JP2003311296A - Sewage treatment apparatus - Google Patents
Sewage treatment apparatusInfo
- Publication number
- JP2003311296A JP2003311296A JP2002116407A JP2002116407A JP2003311296A JP 2003311296 A JP2003311296 A JP 2003311296A JP 2002116407 A JP2002116407 A JP 2002116407A JP 2002116407 A JP2002116407 A JP 2002116407A JP 2003311296 A JP2003311296 A JP 2003311296A
- Authority
- JP
- Japan
- Prior art keywords
- nitrification
- treated
- sludge
- treatment
- adjusting means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011282 treatment Methods 0.000 title claims abstract description 108
- 239000010865 sewage Substances 0.000 title claims abstract description 66
- 239000010802 sludge Substances 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910001868 water Inorganic materials 0.000 claims abstract description 73
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 244000005700 microbiome Species 0.000 claims abstract description 11
- 238000011221 initial treatment Methods 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 235000008216 herbs Nutrition 0.000 claims description 4
- 230000002503 metabolic effect Effects 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 238000005273 aeration Methods 0.000 abstract description 5
- 239000002207 metabolite Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 244000246386 Mentha pulegium Species 0.000 description 10
- 235000016257 Mentha pulegium Nutrition 0.000 description 10
- 235000004357 Mentha x piperita Nutrition 0.000 description 10
- 235000001050 hortel pimenta Nutrition 0.000 description 10
- 238000005192 partition Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 235000006679 Mentha X verticillata Nutrition 0.000 description 5
- 244000245214 Mentha canadensis Species 0.000 description 5
- 235000016278 Mentha canadensis Nutrition 0.000 description 5
- 235000002899 Mentha suaveolens Nutrition 0.000 description 5
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 5
- 230000001877 deodorizing effect Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- NOOLISFMXDJSKH-UTLUCORTSA-N (+)-Neomenthol Chemical compound CC(C)[C@@H]1CC[C@@H](C)C[C@@H]1O NOOLISFMXDJSKH-UTLUCORTSA-N 0.000 description 3
- NOOLISFMXDJSKH-UHFFFAOYSA-N DL-menthol Natural products CC(C)C1CCC(C)CC1O NOOLISFMXDJSKH-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000077 insect repellent Substances 0.000 description 3
- 229940041616 menthol Drugs 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 235000014749 Mentha crispa Nutrition 0.000 description 1
- 244000078639 Mentha spicata Species 0.000 description 1
- 235000010679 Nepeta cataria Nutrition 0.000 description 1
- 240000009215 Nepeta cataria Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical group 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
Landscapes
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、硝化による生物学
的反応を利用した汚水処理装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus utilizing a biological reaction due to nitrification.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来の
汚水処理装置においては、流入汚水をそのまま汚水導入
部から曝気処理部に供給し、その曝気処理部で処理した
処理汚水を固液分離部で処理汚泥と処理水とに分離して
いた。しかし、流入汚水をそのまま処理する曝気処理部
では汚泥の発生を抑制することが困難であった。また、
発生した汚泥の悪臭等を抑制することも困難であった。2. Description of the Related Art In a conventional sewage treatment apparatus, inflowing sewage is supplied as it is from an sewage introduction part to an aeration treatment part, and the treated sewage treated in the aeration treatment part is solid-liquid separation part. It was separated into treated sludge and treated water. However, it was difficult to suppress the generation of sludge in the aeration processing unit that directly processes the inflowing wastewater. Also,
It was also difficult to suppress the offensive odor of the generated sludge.
【０００３】この発明は、汚水処理装置において、曝気
処理部に代えて硝化処理部を採用し、その硝化処理部で
硝化効率を良くして、汚泥の発生を抑制するとともに、
発生した汚泥の悪臭等も抑制することを目的としてい
る。This invention employs a nitrification treatment section instead of an aeration treatment section in a sewage treatment apparatus, improves the nitrification efficiency in the nitrification treatment section, and suppresses the generation of sludge.
The purpose is to suppress the offensive odor of the generated sludge.
【０００４】[0004]
【課題を解決するための手段及び発明の効果】後記実施
形態の図面（図１〜４）の符号を援用して本発明を説明
する。
＊ 請求項１の発明
この発明にかかる汚水処理装置（Ｍ）は、流入汚水
（８）に対し微生物を働かせることによりその流入汚水
（８）を分解処理する嫌気処理を少なくとも行う前処理
部（嫌気処理部としての耐気性部１及び絶対嫌気性部
２）と、この前処理部（１，２）からの処理汚水（１
１）を硝化して硝化汚泥を含む処理汚水（１８）に変え
る硝化処理部（３）とを備えている。なお、前処理部
（１，２）では、嫌気処理に加え、好気処理が行われて
もよい。Means for Solving the Problems and Effects of the Invention The present invention will be described with reference to the reference numerals in the drawings (FIGS. 1 to 4) of the embodiments described below. * Invention of claim 1 The sewage treatment apparatus (M) according to the present invention is a pretreatment unit (anaerobic) for performing at least an anaerobic treatment for decomposing the inflow sewage (8) by causing microorganisms to act on the inflow sewage (8). The air-resistant part 1 and the absolutely anaerobic part 2) as the treatment part, and the treated sewage (1) from the pretreatment part (1, 2)
A nitrification treatment section (3) for nitrifying 1) to convert it into treated sewage (18) containing nitrification sludge. Note that the pretreatment unit (1, 2) may perform aerobic treatment in addition to anaerobic treatment.
【０００５】この発明では、硝化処理前に行う嫌気処理
により、硝化処理部（３）に流入する処理汚水（１１）
を軽減させることができる。そのため、硝化処理部
（３）では、少ない量の処理汚水（１１）を効率良く硝
化することができる。従って、硝化処理部（３）で処理
汚水（１８）における硝化汚泥の発生を抑制することが
できる。In the present invention, the treated sewage (11) flowing into the nitrification treatment section (3) by the anaerobic treatment performed before the nitrification treatment.
Can be reduced. Therefore, the nitrification treatment section (3) can efficiently nitrify a small amount of the treated sewage (11). Therefore, it is possible to suppress the generation of nitrification sludge in the treated wastewater (18) in the nitrification treatment section (3).
【０００６】＊ 請求項２の発明
この発明にかかる汚水処理装置（Ｍ）は、流入汚水
（８）と汚泥（例えば硝化汚泥である処理汚泥９）との
混合液（１０）に対し微生物を接触させる一次処理と、
この一次処理がなされた混合液（１０）に対し微生物を
働かせることにより、代謝生産物を経て、この混合液
（１０）を分解処理する二次処理とを行う嫌気処理部
（耐気性部１、絶対嫌気性部２）である前処理部と、こ
の前処理部（１，２）からの処理汚水（１１）を硝化し
て硝化汚泥を含む処理汚水（１８）に変える硝化処理部
（３）とを備えている。* Invention of claim 2 In the wastewater treatment device (M) according to the present invention, microorganisms are brought into contact with a mixed liquid (10) of inflowing wastewater (8) and sludge (for example, treated sludge 9 which is nitrifying sludge). Primary processing to
The anaerobic treatment section (the gas-proof section 1, which performs a secondary treatment of decomposing the mixed solution (10) through a metabolite by allowing a microorganism to act on the mixed solution (10) subjected to the primary treatment. A pretreatment unit that is an absolute anaerobic unit 2) and a nitrification treatment unit (3) that nitrifies the treated sewage (11) from the pretreatment units (1, 2) to convert it into treated sewage (18) containing nitrifying sludge. It has and.
【０００７】この発明では、硝化処理前に行う嫌気処理
により、硝化処理部（３）に流入する処理汚水（１１）
を軽減させることができる。そのため、硝化処理部
（３）では、少ない量の処理汚水（１１）を効率良く硝
化することができる。従って、硝化処理部（３）で処理
汚水（１８）における硝化汚泥の発生を抑制することが
できる。In the present invention, the treated sewage (11) that flows into the nitrification treatment section (3) by the anaerobic treatment performed before the nitrification treatment.
Can be reduced. Therefore, the nitrification treatment section (3) can efficiently nitrify a small amount of the treated sewage (11). Therefore, it is possible to suppress the generation of nitrification sludge in the treated wastewater (18) in the nitrification treatment section (3).
【０００８】さらに、この発明では、一次処理部（下水
管１ａ等の汚水導入部である耐気性部１）と、この一次
処理部からつながる二次処理部（ポンプ井等の主処理部
である絶対嫌気性部２）とに分けているので、微生物接
触域を広げて微生物反応時間を長くすることができる。
従って、汚泥（９）を利用した嫌気処理により、悪臭源
やスカムなどの発生を抑制して軽減することができる。Further, according to the present invention, the primary treatment section (the air-proof section 1 which is the sewage introduction section such as the sewer pipe 1a) and the secondary treatment section (main treatment section such as a pump well) connected from the primary treatment section. Since it is divided into the absolutely anaerobic part 2), it is possible to extend the microbial contact area and prolong the microbial reaction time.
Therefore, by the anaerobic treatment using the sludge (9), it is possible to suppress and reduce the generation of offensive odor sources, scum, and the like.
【０００９】＊ 請求項３の発明
この発明においては、請求項１または請求項２の発明に
かかる硝化処理部（３）で処理された処理汚水（１８）
を硝化汚泥含有処理汚泥（９）と処理水（２４）とに分
離し、その処理汚泥（９）を前処理部（１，２）に返送
する固液分離部（４）を備えている。請求項２の発明で
は、固液分離部（４）からの処理汚泥（９）を嫌気処理
部（１，２）で流入汚水（８）と混合する汚泥として返
送する。Invention of Claim 3 In this invention, the treated wastewater (18) treated in the nitrification treatment section (3) according to the invention of Claim 1 or Claim 2.
Is provided with a solid-liquid separation section (4) for separating the treated sludge containing nitrification sludge (9) and the treated water (24) and returning the treated sludge (9) to the pretreatment sections (1, 2). In the invention of claim 2, the treated sludge (9) from the solid-liquid separation section (4) is returned as sludge to be mixed with the inflowing wastewater (8) in the anaerobic treatment section (1, 2).
【００１０】この発明では、硝化処理部（３）で処理さ
れた処理汚水（１８）から分離した処理汚泥（９）を前
処理部（１，２）に返送しているので、処理汚泥（９）
を循環させた嫌気処理により、悪臭源やスカムなどの発
生をより一層抑制して軽減するとともに、汚泥の発生も
抑制することができる。In the present invention, the treated sludge (9) separated from the treated wastewater (18) treated in the nitrification treatment section (3) is returned to the pretreatment section (1, 2), so the treated sludge (9) )
By circulating the anaerobic treatment, it is possible to further suppress and reduce the generation of a bad smell source, scum, and the like, and also to suppress the generation of sludge.
【００１１】＊ 請求項４の発明
この発明においては、請求項３の発明にかかる固液分離
部（４）からの処理水（２４）をハーブと接触させる処
理水流出部（ハーブ水路２６）を備えている。この発明
では、処理水（２４）がハーブと接触してハーブの成分
を吸収するとハーブ含有水に変化するため、このハーブ
含有水が有する芳香脱臭効果により悪臭の発生を抑制す
ることができる。例えば、このハーブは、和種ハッカと
洋種ハッカとのうち少なくとも和種ハッカであり、植生
されていることが好ましい。特にハッカに含まれている
メントールやメントンなどが、高い芳香脱臭効果に加
え、防虫効果も発揮するので、設備環境をより一層改善
することができる。特に和種ハッカはペパーミント等の
洋種ハッカと比較してメントールを最も多く含むので、
脱臭効果や防虫効果をより一層期待することができる。
一方、ペパーミント等の洋種ハッカは香りの点で優れて
いるため、芳香効果をより一層期待することができる。
そのため、和種ハッカと洋種ハッカとを組み合わせた場
合には、和種ハッカの特徴と洋種ハッカの特徴とを互い
に発揮し合い、従来にない芳香脱臭効果及び防虫効果を
同時に奏する。また、和種ハッカは洋種ハッカと異なる
芳香効果も有するため、和種ハッカのみでもこれらの効
果を十分に期待することができる。さらに、生きた状態
で伸びている植生ハーブにより、脱臭効果をより一層高
めることができる。* Invention of Claim 4 In the present invention, the treated water outflow portion (herb water channel 26) for contacting the treated water (24) from the solid-liquid separation portion (4) according to the invention of claim 3 with herbs is provided. I have it. According to the present invention, when the treated water (24) comes into contact with the herbs and absorbs the herb components, the treated water changes to the herb-containing water. Therefore, the aroma deodorizing effect of the herb-containing water can suppress the generation of malodor. For example, this herb is at least a Japanese peppermint among Japanese peppermint and Western peppermint, and is preferably vegetated. In particular, menthol, menthol and the like contained in peppermint exhibit a high aroma deodorizing effect as well as an insect repellent effect, so that the equipment environment can be further improved. In particular, Japanese mint has more menthol than Western mint such as peppermint,
The deodorizing effect and insect repellent effect can be further expected.
On the other hand, since Western mint such as peppermint is excellent in scent, it is possible to further expect an aroma effect.
Therefore, when the Japanese mint and the Western mint are combined, the characteristics of the Japanese mint and the characteristics of the Western mint are mutually exerted, and the aroma deodorizing effect and the insect repellent effect which have not been hitherto exhibited. Further, since Japanese mint has an aroma effect different from that of Western mint, these effects can be sufficiently expected even with Japanese mint alone. Furthermore, the deodorizing effect can be further enhanced by the vegetation herbs that grow in a living state.
【００１２】＊ 請求項５の発明
この発明にかかる汚水処理装置においては、汚水（処理
汚水１１）を硝化して硝化汚泥を含む処理汚水（１８）
に変える硝化処理部（３）を備え、この硝化処理部
（３）で、前記汚水（１１）が入る流入路（１２，１
３）には流入量調節手段（堰１４、ポンプ１６等）を設
けるとともに、前記硝化汚泥を含む処理汚水（１８）が
出る流出路（１９，２０）には流出量調節手段（堰２
１、ポンプ２３等）を設け、この流入量調節手段（１
４，１６）と流出量調節手段（２１，２３）との間で硝
化処理部（３）内に攪拌手段（攪拌部１７）を設けてい
る。この発明では、流入量調節手段（１４，１６）と流
出量調節手段（２１，２３）とにより、硝化処理部
（３）で汚水（処理汚水１１）を適切な量に保ち易くな
り、攪拌手段（１７）と相まって、汚水（１１）を効率
良く硝化することができる。Invention of Claim 5 In the wastewater treatment apparatus according to the present invention, treated wastewater containing nitrifying sludge by nitrifying the wastewater (treated wastewater 11) (18).
A nitrification treatment part (3) for changing into the inflow passage (12, 1) into which the waste water (11) enters.
3) is provided with an inflow amount adjusting means (weir 14, pump 16, etc.), and an outflow amount adjusting means (weir 2) is provided in an outflow passage (19, 20) from which the treated wastewater (18) containing the nitrifying sludge is discharged.
1, a pump 23, etc. are provided, and the inflow amount adjusting means (1
4, 16) and the outflow amount adjusting means (21, 23) are provided with a stirring means (stirring section 17) in the nitrification processing section (3). According to the present invention, the inflow amount adjusting means (14, 16) and the outflow amount adjusting means (21, 23) make it easy to maintain an appropriate amount of sewage (treated sewage 11) in the nitrification treatment section (3), and the stirring means. In combination with (17), the wastewater (11) can be efficiently nitrified.
【００１３】＊ 請求項６の発明
この発明においては、請求項１から請求項４のうちいず
れかの請求項の発明にかかる硝化処理部（３）で、前処
理部（１，２）からの処理汚水（１１）が入る流入路
（１２，１３）には流入量調節手段（堰１４，ポンプ１
６等）を設けるとともに、硝化汚泥を含む処理汚水（１
８）が出る流出路（１９，２０）には流出量調節手段
（堰２１，ポンプ２３等）を設け、この流入量調節手段
（１４，１６）と流出量調節手段（２１，２３）との間
で硝化処理部（３）内に攪拌手段（攪拌部１７）を設け
ている。この発明では、流入量調節手段（１４，１６）
と流出量調節手段（２１，２３）とにより、硝化処理部
（３）で処理汚水（１１）を適切な量に保ち易くなり、
攪拌手段（１７）と相まって、処理汚水（１１）を効率
良く硝化することができる。* Invention of claim 6 In the present invention, the nitrification treatment section (3) according to the invention of any one of claims 1 to 4 is provided from the pretreatment section (1, 2). The inflow passages (12, 13) into which the treated sewage (11) enters are provided with inflow control means (weir 14, pump 1).
6), and treated wastewater containing nitrifying sludge (1
8) Outflow passages (19, 20) are provided with outflow amount adjusting means (weir 21, pump 23, etc.), and these inflow amount adjusting means (14, 16) and outflow amount adjusting means (21, 23) are connected. A stirring means (stirring section 17) is provided in the nitrification processing section (3). In this invention, the inflow amount adjusting means (14, 16)
With the outflow amount adjusting means (21, 23), it becomes easy to keep the treated wastewater (11) in an appropriate amount in the nitrification treatment section (3),
Together with the stirring means (17), the treated wastewater (11) can be nitrified efficiently.
【００１４】＊ 請求項７の発明
この発明は、請求項５または請求項６の発明を前提とし
て下記のように構成されている。* Invention of Claim 7 This invention is configured as follows on the premise of the invention of Claim 5 or Claim 6.
【００１５】前記流入路は硝化処理部（３）に対し互い
に並列に接続した第一流入路（１２）と第二流入路（１
３）とを備えている。前記流入量調節手段は、この第一
流入路（１２）の開口面積（Ｓ）を調節する開口面積調
節手段（堰１４）と、硝化処理部（３）内の水位に応じ
てこの第二流入路（１３）の流入量を調節する水位調節
手段（ポンプ１６等）とを備えている。例えば、この開
口面積調節手段は第一流入路（１２）の上流側と下流側
とを仕切る仕切板（１５）を有する堰（１４）であっ
て、この仕切板（１５）は一または複数の可動板（１５
ａ）を有し、この可動板（１５ａ）は第一流入路（１
２）の底面に対し接近離間する上下方向へ開閉動して第
一流入路（１２）の開口面積（Ｓ）を調節し得る。ま
た、この水位調節手段においては、汚水（処理汚水１
１）を第二流入路（１３）から硝化処理部（３）に送る
ポンプ（１６）と、硝化処理部（３）内の水位を検知す
る水位センサ（３０，３１）とを設けるか、または、こ
のポンプ（１６）の駆動時間を設定するタイマ（３３）
を設けるか、またはそれらの両方を設け、この水位セン
サ（３０，３１）からの検知信号、またはこのタイマ
（３３）からの指令信号に基づき、ポンプ（１６）を駆
動制御する駆動制御手段（コントローラ３２）を設け
た。The inflow passages are a first inflow passage (12) and a second inflow passage (1) connected in parallel to the nitrification treatment section (3).
3) and are provided. The inflow amount adjusting means adjusts the opening area (S) of the first inflow path (12) and the second inflow according to the water level in the nitrification treatment section (3). It is provided with a water level adjusting means (pump 16 or the like) for adjusting the inflow amount of the passage (13). For example, the opening area adjusting means is a weir (14) having a partition plate (15) for partitioning the upstream side and the downstream side of the first inflow path (12), and the partition plate (15) is one or more. Movable plate (15
a), and the movable plate (15a) has a first inflow passage (1
The opening area (S) of the first inflow path (12) can be adjusted by opening / closing in the vertical direction approaching and separating from the bottom surface of 2). Further, in this water level adjusting means, sewage (treated sewage 1
A pump (16) for sending 1) from the second inflow passage (13) to the nitrification treatment section (3) and a water level sensor (30, 31) for detecting the water level in the nitrification treatment section (3) are provided, or , A timer (33) for setting the drive time of this pump (16)
Drive control means (controller) for controlling the pump (16) based on a detection signal from the water level sensor (30, 31) or a command signal from the timer (33). 32) is provided.
【００１６】前記流出路は硝化処理部（３）に対し互い
に並列に接続した第一流出路（１９）と第二流出路（２
０）とを備えている。前記流出量調節手段は、この第一
流出路（１９）の開口面積（Ｓ）を調節する開口面積調
節手段（堰２１）と、硝化処理部（３）内の水位に応じ
てこの第二流出路（２０）の流出量を調節する水位調節
手段（ポンプ２３等）とを備えている。例えば、この開
口面積調節手段は第一流出路（１９）の上流側と下流側
とを仕切る仕切板（２２）を有する堰（２１）であっ
て、この仕切板（２２）は一または複数の可動板（２２
ａ）を有し、この可動板（２２ａ）は第一流出路（１
９）の底面に対し接近離間する上下方向へ開閉動して第
一流出路（１９）の開口面積（Ｓ）を調節し得る。ま
た、この水位調節手段においては、硝化処理部（３）か
ら処理汚水（１８）を第二流出路（２０）に送るポンプ
（２３）と、硝化処理部（３）内の水位を検知する水位
センサ（３０，３１）とを設けるか、または、このポン
プ（２３）の駆動時間を設定するタイマ（３４）を設け
るか、またはそれらの両方を設け、この水位センサ（３
０，３１）からの検知信号、またはこのタイマ（３４）
からの指令信号に基づき、ポンプ（２３）を駆動制御す
る駆動制御手段（コントローラ３２）を設けた。The outflow passages are a first outflow passage (19) and a second outflow passage (2) connected in parallel to the nitrification treatment section (3).
0) and. The outflow amount adjusting means adjusts the opening area (S) of the first outflow path (19) and the second outflow path according to the water level in the nitrification treatment section (3). The water level adjusting means (pump 23 or the like) for adjusting the outflow amount of (20) is provided. For example, the opening area adjusting means is a weir (21) having a partition plate (22) for partitioning the upstream side and the downstream side of the first outflow path (19), and the partition plate (22) is one or more movable. Board (22
a), the movable plate (22a) has a first outflow passage (1
The opening area (S) of the first outflow passage (19) can be adjusted by opening and closing in the up and down direction approaching and separating from the bottom surface of 9). Further, in this water level adjusting means, a pump (23) for sending the treated wastewater (18) from the nitrification treatment section (3) to the second outflow passage (20) and a water level for detecting the water level in the nitrification treatment section (3). The sensor (30, 31) is provided, or the timer (34) for setting the drive time of the pump (23) is provided, or both of them are provided, and the water level sensor (3
0, 31), or this timer (34)
Drive control means (controller 32) for controlling the drive of the pump (23) based on the command signal from is provided.
【００１７】この発明では、硝化処理部（３）の水位を
設定範囲に保ち易くなるため、硝化処理部（３）では処
理汚水（１１）をより一層効率良く硝化することができ
る。
＊ 請求項８の発明
この発明においては、請求項１から請求項７のうちいず
れかの請求項の発明にかかる硝化処理部（３）内に空気
を送る空気供給手段（送風機２８）を設けている。この
場合、例えば、この硝化処理部（３）内のペーハーを検
出するペーハセンサ（２９）を設け、このペーハセンサ
（２９）によるペーハーの検出値に基づき、この空気供
給手段（送風機２８）を駆動制御する駆動制御手段（コ
ントローラ３２）を設ける。この発明では、硝化汚泥の
ペーハー値（ＰＨ）を適切な範囲に設定し易くなる。According to the present invention, since the water level of the nitrification treatment section (3) can be easily maintained within the set range, the treated wastewater (11) can be nitrified in the nitrification treatment section (3) more efficiently. * Invention of claim 8 In this invention, an air supply means (blower 28) for sending air is provided in the nitrification treatment section (3) according to the invention of any one of claims 1 to 7. There is. In this case, for example, a pH sensor (29) for detecting the pH in the nitrification processing section (3) is provided, and the air supply means (blower 28) is drive-controlled based on the detected value of the pH by the pH sensor (29). Drive control means (controller 32) is provided. According to the present invention, it becomes easy to set the pH value (PH) of the nitrifying sludge within an appropriate range.
【００１８】＊ 請求項９の発明
この発明にかかる汚水処理装置（Ｍ）は、汚水（処理汚
水１１）を硝化して硝化汚泥を含む処理汚水（１８）に
変える硝化処理部（３）を備え、この硝化処理部（３）
の硝化汚泥は、活性汚泥数（ＭＬＳＳ）が１リットルあ
たり平均４５００ｍｇ以上７０００ｍｇ以下である第一
条件と、ペーハー値（ＰＨ）が平均６．５以上６．７以
下である第二条件と、溶存酸素値（ＤＯ）が１リットル
あたり平均０．２ｍｇ以上０．５ｍｇ以下である第三条
件とのうち、第一条件と第二条件とを有するか、また
は、第一条件と第三条件とを有するものである。この発
明にかかる硝化汚泥では、汚泥や悪臭やスカムの発生を
抑制することができるとともに、酸化作用による殺菌効
果も生じ、汚泥を良質にすることができる。* Invention of Claim 9 A wastewater treatment device (M) according to the present invention comprises a nitrification treatment section (3) for nitrifying wastewater (treatment wastewater 11) into treatment wastewater (18) containing nitrifying sludge. , This nitrification unit (3)
The nitrifying sludge of No. 1 has a first condition that the number of activated sludge (MLSS) is 4500 mg or more and 7000 mg or less per liter on average, and a second condition that the pH value (PH) is 6.5 or more and 6.7 or less on average, and is dissolved. Among the third conditions having an average oxygen value (DO) of 0.2 mg or more and 0.5 mg or less per liter, the first condition and the second condition are satisfied, or the first condition and the third condition are satisfied. I have. With the nitrifying sludge according to the present invention, it is possible to suppress the generation of sludge, malodor, and scum, and also to produce a bactericidal effect due to the oxidizing action, so that the sludge can be improved in quality.
【００１９】[0019]
【発明の実施の形態】以下、本発明の一実施形態にかか
る汚水処理装置について図１〜４を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION A sewage treatment apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
【００２０】図１に示す汚水処理装置Ｍは、硝化前処理
部である嫌気処理部としての耐気性部１（一次処理部）
及び絶対嫌気性部２（二次処理部）と、硝化処理部３
と、固液分離部４とを備えている。この固液分離部４に
は処理汚泥排出口５と処理水排出口６とが設けられてい
る。この固液分離部４の処理汚泥排出口５は、汚泥返送
経路７により前記耐気性部１に接続されている。The sewage treatment apparatus M shown in FIG. 1 has an air resistant portion 1 (primary treatment portion) as an anaerobic treatment portion which is a nitrification pretreatment portion.
And absolute anaerobic part 2 (secondary processing part) and nitrification processing part 3
And a solid-liquid separation unit 4. The solid-liquid separation section 4 is provided with a treated sludge discharge port 5 and a treated water discharge port 6. The treated sludge discharge port 5 of the solid-liquid separation section 4 is connected to the gas resistant section 1 by a sludge return path 7.
【００２１】流入汚水８は、まず、前記耐気性部１（例
えば汚水導入部としての下水管１ａなど、汚水を運ぶ通
路を広く意味する汚水管）に至る。この耐気性部１で
は、後述するように固液分離部４から汚泥返送経路７に
より返送された処理汚泥９（硝化汚泥）が、図２に示す
ように、例えば下水管１ａに通じるマンホール１ｂから
取り込まれ、酸素が少ない状態にある流入汚水８に混合
されるとともに、この処理汚泥９からのみ酸素が流入汚
水８に補充される。この下水管１ａ内では、前記処理汚
泥９内の微生物が、流入汚水８への処理汚泥９の取り込
み位置Ｐで、それらの混合液１０に接触する。The inflowing sewage 8 first reaches the air-resistant part 1 (for example, a sewage pipe 1a serving as a sewage introduction part, such as a sewage pipe broadly meaning a passage for carrying sewage). In this air-resistant portion 1, as shown in FIG. 2, treated sludge 9 (nitrification sludge) returned from the solid-liquid separation portion 4 through the sludge return passage 7 is, for example, from the manhole 1b leading to the sewer pipe 1a. The ingested wastewater 8 is taken in and mixed with the inflowing wastewater 8 having a low oxygen content, and the inflowing wastewater 8 is supplemented with oxygen only from the treated sludge 9. In this sewage pipe 1a, the microorganisms in the treated sludge 9 come into contact with the mixed liquid 10 of the treated sludge 9 at the intake position P of the treated sludge 9.
【００２２】次に、この混合液１０は前記絶対嫌気性部
２（例えば攪拌機能を有するポンプ井である主処理槽）
に至る。混合液１０が前記下水管１ａからポンプ井に至
るとともにそのポンプ井で滞留する間（平均１〜２時
間）に、混合液１０に対し微生物が働くと、酸素の供給
が極めて少ない状態で、混合液１０は、有機酸やアルコ
ールなどの代謝生産物を経て、二酸化炭素や水や硫化水
素やメタンや窒素ガスなどに分解処理される。すなわ
ち、酸発酵や、硫酸還元や、部分的なメタン発酵が行わ
れる。その場合、悪臭発生源となる脂肪及び油を吸着及
び酸化して悪臭を除去する。ちなみに、この絶対嫌気性
部２内で、活性汚泥数（ＭＬＳＳ）は１リットルあたり
平均３０００ｍｇ以上１００００ｍｇ以下であり、ペー
ハー値（ＰＨ）は平均６．７以上７．３以下であり、溶
存酸素値（ＤＯ）は１リットルあたり極めて微量であ
る。また、この絶対嫌気性部２で処理された処理汚水１
１における生物化学的酸素供給量（ＢＯＤ）は、１リッ
トルあたり平均２０ｍｇ以下であり、前記流入汚水８に
おけるＢＯＤと比較して、約９０％以上低下している。
従って、硝化処理前に行う嫌気処理により、後記硝化処
理部３に流入する処理汚水１１を流入汚水８の約１０分
の１の量に軽減させることができる。Next, the mixed solution 10 is used as the absolute anaerobic part 2 (for example, a main processing tank which is a pump well having a stirring function).
Leading to. When microorganisms act on the mixed liquid 10 while the mixed liquid 10 reaches the pump well from the sewage pipe 1a and stays in the pump well (1 to 2 hours on average), the mixture is mixed with a very small amount of oxygen supply. The liquid 10 is decomposed into carbon dioxide, water, hydrogen sulfide, methane, nitrogen gas and the like through metabolic products such as organic acids and alcohols. That is, acid fermentation, sulfuric acid reduction, and partial methane fermentation are performed. In that case, the malodor is removed by adsorbing and oxidizing the fat and oil that are the source of malodor. By the way, in this absolute anaerobic part 2, the number of activated sludge (MLSS) is an average of 3000 mg or more and 10000 mg or less per liter, the pH value (PH) is an average of 6.7 or more and 7.3 or less, and the dissolved oxygen value is (DO) is extremely small per liter. In addition, the treated sewage 1 treated in this absolute anaerobic part 2
The biochemical oxygen supply amount (BOD) in 1 is 20 mg or less per liter on average, which is about 90% or more lower than the BOD in the inflow wastewater 8.
Therefore, the anaerobic treatment performed before the nitrification treatment can reduce the amount of the treated sewage 11 flowing into the nitrification treatment unit 3 described later to about one-tenth of the amount of the inflowing sewage 8.
【００２３】次に、前記絶対嫌気性部２で処理された処
理汚水１１は、この絶対嫌気性部２と前記硝化処理部３
との間で互いに並列に接続された第一流入路１２と第二
流入路１３とのうち、第一流入路１２で堰１４（流入量
調節手段としての開口面積調節手段）を通って硝化処理
部３に至る。この堰１４においては、図３に示すよう
に、第一流入路１２の上流側と下流側とを仕切る仕切板
１５で一または複数の可動板１５ａを有し、この可動板
１５ａは第一流入路１２の底面に対し接近離間する上下
方向へ開閉動して第一流入路１２の開口面積Ｓを調節し
得る。従って、第一流入路１２から流入する処理汚水１
１の流量を調節することができる。また、この処理汚水
１１は、流入量調節手段の水位調節手段として後述する
ように、硝化処理部３の下限水位に応じてポンプ１６を
駆動制御することにより、第二流入路１３からも強制的
に硝化処理部３に送られる。Next, the treated sewage 11 treated in the absolute anaerobic section 2 is treated with the absolute anaerobic section 2 and the nitrification treatment section 3.
Of the first inflow path 12 and the second inflow path 13 connected in parallel with each other through the weir 14 (opening area adjusting means as inflow amount adjusting means) in the first inflow path 12 Reach Part 3. As shown in FIG. 3, the weir 14 has one or a plurality of movable plates 15a with a partition plate 15 that partitions the upstream side and the downstream side of the first inflow passage 12, and the movable plate 15a is used for the first inflow. The opening area S of the first inflow passage 12 can be adjusted by opening and closing in the up and down direction approaching and separating from the bottom surface of the passage 12. Therefore, the treated sewage 1 flowing from the first inflow passage 12
A flow rate of 1 can be adjusted. The treated wastewater 11 is also forcedly supplied from the second inflow passage 13 by driving and controlling the pump 16 according to the lower limit water level of the nitrification treatment unit 3 as described below as a water level adjusting means of the inflow amount adjusting means. Then, it is sent to the nitrification processing unit 3.
【００２４】この硝化処理部３では、前記絶対嫌気性部
２からの処理汚水１１が各種攪拌手段（攪拌羽根や流体
噴射などの攪拌部１７）により攪拌され、主にその攪拌
と前記流入量調節と後記流出量調節とにより、その処理
汚水１１を効率良く硝化して硝化汚泥を含む処理汚水１
８に変える。ちなみに、硝化とは、窒素化合物の分解に
よって生じたアンモニアが、栄養菌などの微生物によっ
て酸化され、硝酸や亜硝酸に変化する現象をいう。この
硝化処理部３内の硝化汚泥については、その活性汚泥数
（ＭＬＳＳ）やペーハー値（ＰＨ）や溶存酸素値（Ｄ
Ｏ）が適切な範囲に設定されるので、汚泥や悪臭やスカ
ムの発生を抑制することができるとともに、酸化作用に
よる殺菌効果も生じる。ちなみに、活性汚泥数（ＭＬＳ
Ｓ）は１リットルあたり平均４５００ｍｇ以上７０００
ｍｇ以下であり、ペーハー値（ＰＨ）は平均６．５以上
６．７以下であり、溶存酸素値（ＤＯ）は１リットルあ
たり平均０．２ｍｇ以上０．５ｍｇ以下である。In the nitrification processing section 3, the treated sewage 11 from the absolute anaerobic section 2 is agitated by various agitating means (agitating section 17 such as agitating blades and fluid jets), and the agitation and the inflow rate adjustment are mainly performed. And the effluent amount adjustment described later, the treated sewage 11 is efficiently nitrified to contain nitrified sludge, and the treated sewage 1
Change to 8. Incidentally, nitrification is a phenomenon in which ammonia generated by decomposition of nitrogen compounds is oxidized by microorganisms such as vegetative bacteria and converted into nitric acid or nitrous acid. Regarding the nitrification sludge in the nitrification treatment section 3, the number of activated sludge (MLSS), pH value (PH), dissolved oxygen value (D)
Since O) is set in an appropriate range, generation of sludge, malodor and scum can be suppressed, and a sterilizing effect due to an oxidizing action is also produced. By the way, the number of activated sludge (MLS
S) is an average of 4500 mg or more and 7,000 per liter
The average value is not more than mg, the pH value (PH) is not less than 6.5 and not more than 6.7 on average, and the dissolved oxygen value (DO) is not less than 0.2 mg and not more than 0.5 mg per liter on average.
【００２５】次に、前記硝化処理部３で処理された処理
汚水１８は、この硝化処理部３と前記固液分離部４との
間で互いに並列に接続された第一流出路１９と第二流出
路２０とのうち、第一流出路１９で堰２１（流出量調節
手段としての開口面積調節手段）を通って固液分離部４
に至る。この堰２１においては、図４に示すように、第
一流出路１９の上流側と下流側とを仕切る仕切板２２で
一または複数の可動板２２ａを有し、この可動板２２ａ
は第一流出路１９の底面に対し接近離間する上下方向へ
開閉動して第一流出路１９の開口面積Ｓを調節し得る。
従って、第一流出路１９に流出する処理汚水１８の流量
を調節することができる。また、この処理汚水１８は、
流出量調節手段の水位調節手段として後述するように、
硝化処理部３の上限水位に応じてポンプ２３を駆動制御
することにより、第二流出路２０からも強制的に固液分
離部４に送られる。Next, the treated wastewater 18 treated in the nitrification treatment section 3 is connected to the nitrification treatment section 3 and the solid-liquid separation section 4 in parallel with each other by a first outflow passage 19 and a second outflow passage. Of the passage 20 and the first outflow passage 19, the solid-liquid separation section 4 is passed through the weir 21 (opening area adjusting means as the outflow amount adjusting means).
Leading to. As shown in FIG. 4, the weir 21 has one or a plurality of movable plates 22a, which are partition plates 22 that partition the upstream side and the downstream side of the first outflow passage 19, and the movable plate 22a.
The opening area S of the first outflow passage 19 can be adjusted by opening and closing in the up and down direction approaching and separating from the bottom surface of the first outflow passage 19.
Therefore, the flow rate of the treated sewage 18 flowing out to the first outflow passage 19 can be adjusted. In addition, this treated wastewater 18 is
As described below as the water level adjusting means of the outflow amount adjusting means,
By driving and controlling the pump 23 according to the upper limit water level of the nitrification treatment unit 3, the second outflow passage 20 is also forcedly sent to the solid-liquid separation unit 4.
【００２６】前記処理汚水１８は、固液分離部４におい
て前記処理汚泥排出口５から排出される処理汚泥９（硝
化汚泥）と、前記処理水排出口６から排出される処理水
２４とに分離される。この処理水２４は、放流水路２５
から直接、または、ハーブ水路２６（処理水流出部）で
植生ハーブと接触した後に放流水路２５から、例えば河
川などに放流される。このハーブとしては、日本ハッカ
とも言う和種ハッカを植生させ、そのほか洋種ハッカ
（ペパーミントやスペアミントやキャットミントなど）
を植生させてもよい。また、この処理汚泥９（硝化汚
泥）は、前記耐気性部１で流入汚水８と混合される汚泥
として前記汚泥返送経路７により返送される。なお、固
液分離部４からの処理汚泥９とは別に汚泥（硝化汚泥）
を供給路２７から補充的に投入してもよい。The treated wastewater 18 is separated into a treated sludge 9 (nitrified sludge) discharged from the treated sludge discharge port 5 and a treated water 24 discharged from the treated water discharge port 6 in the solid-liquid separation section 4. To be done. The treated water 24 is discharged into the discharge channel 25.
Directly or from the discharge channel 25 after contact with the vegetation herb in the herb channel 26 (treated water outlet), for example, to a river. As this herb, Japanese peppermint, also called Japanese peppermint, is vegetated, and other western peppermint (peppermint, spearmint, catmint, etc.)
May be vegetated. The treated sludge 9 (nitrification sludge) is returned by the sludge return path 7 as sludge that is mixed with the inflowing wastewater 8 in the air resistant portion 1. In addition to the treated sludge 9 from the solid-liquid separation unit 4, sludge (nitrification sludge)
May be replenished from the supply path 27.
【００２７】前記硝化処理部３には一または複数の送風
機２８（空気供給手段）が取り付けられ、この硝化処理
部３の内部に空気を送るようになっている。この硝化処
理部３内には一または複数のペーハセンサ２９が取り付
けられ、硝化処理部３内のペーハー値（ＰＨ）を検出す
るようになっている。この硝化処理部３内には上限水位
センサ３０が取り付けられてこの硝化処理部３内の上限
水位を検知するとともに、下限水位センサ３１が取り付
けられてこの硝化処理部３内の下限水位を検知するよう
になっている。One or a plurality of air blowers 28 (air supply means) are attached to the nitrification processing section 3 so that air is sent into the nitrification processing section 3. One or a plurality of pH sensors 29 are mounted in the nitrification processing unit 3 so as to detect the pH value (PH) in the nitrification processing unit 3. An upper limit water level sensor 30 is installed in the nitrification processing unit 3 to detect the upper limit water level in the nitrification processing unit 3, and a lower limit water level sensor 31 is installed to detect the lower limit water level in the nitrification processing unit 3. It is like this.
【００２８】コントローラ３２（駆動制御手段）は、前
記ペーハセンサ２９からの検出信号に基づき、前記送風
機２８を駆動制御する。なお、複数の送風機２８と複数
のペーハセンサ２９とがある場合、所定ペーハセンサ２
９と所定送風機２８とを互いに対応させて一組とし、そ
れぞれの組で別々に駆動制御して所定ペーハセンサ２９
の付近に所定送風機２８から送風する。このコントロー
ラ３２は、ペーハー値（ＰＨ）の検出値αがペーハー値
（ＰＨ）の設定値βよりも大きい場合（α＞β）、前記
送風機２８から前記硝化処理部３へ空気を送る。また、
このコントローラ３２は、ペーハー値（ＰＨ）の検出値
αがペーハー値（ＰＨ）の設定値βよりも小さい場合
（α＜β）と、ペーハー値（ＰＨ）の検出値αがペーハ
ー値（ＰＨ）の設定値βに達した場合（α＝β）とにお
いて、前記送風機２８から前記硝化処理部３への送風を
停止する。なお、このような駆動停止制御ばかりでな
く、α＝βの付近で送風量を小さくするように調節して
もよい。前記送風機２８から前記硝化処理部３への送風
量が多くなると、この硝化処理部３内のペーハー値（Ｐ
Ｈ）が下がり、この送風量が少なくなると、このペーハ
ー値（ＰＨ）が上がる。この送風機２８の駆動制御によ
り、ペーハー値（ＰＨ）を適切な範囲に設定し易くな
る。The controller 32 (drive control means) drives and controls the blower 28 based on the detection signal from the pH sensor 29. When there are a plurality of blowers 28 and a plurality of pH sensors 29, the predetermined pH sensor 2
9 and the predetermined blower 28 are made to correspond to each other to form one set, and each set is separately driven and controlled to set the predetermined pH sensor 29.
The air is blown from the predetermined blower 28 to the vicinity of. When the detected value α of the pH value (PH) is larger than the set value β of the pH value (PH) (α> β), the controller 32 sends air from the blower 28 to the nitrification processing unit 3. Also,
When the detected value α of the pH value (PH) is smaller than the set value β of the pH value (PH) (α <β), the controller 32 determines that the detected value α of the pH value (PH) is the pH value (PH). When the set value β is reached (α = β), the air blow from the air blower 28 to the nitrification processing unit 3 is stopped. Not only the drive stop control as described above, but the air flow rate may be adjusted to be small near α = β. When the amount of air blown from the blower 28 to the nitrification processing unit 3 increases, the pH value (P
When H) decreases and the amount of blown air decreases, the pH value (PH) increases. This drive control of the blower 28 facilitates setting the pH value (PH) in an appropriate range.
【００２９】コントローラ３２（駆動制御手段）は、前
記上限水位センサ３０からの上限水位検知信号と、前記
下限水位センサ３１からの下限水位検知信号とに基づ
き、前記ポンプ１６，２３を駆動制御する。硝化処理部
３の水位が上限水位と下限水位との間の水位設定範囲に
ある場合、コントローラ３２はポンプ１６，２３を停止
させる。硝化処理部３の水位が上がって上限水位センサ
３０が硝化処理部３の上限水位を検知した場合、その上
限水位検知信号に基づき、コントローラ３２は停止状態
のポンプ２３を駆動させる。そのため、硝化処理部３の
水位が下がり、コントローラ３２はポンプ２３を停止さ
せる。また、硝化処理部３の水位が下がって下限水位セ
ンサ３１が硝化処理部３の下限水位を検知した場合、そ
の下限水位検知信号に基づき、コントローラ３２は停止
状態のポンプ１６を駆動させる。そのため、硝化処理部
３の水位が上がり、コントローラ３２はポンプ１６を停
止させる。なお、流入汚水８の変動がある程度明らかで
ある場合には、コントローラ３２（駆動制御手段）は、
前記ポンプ１６の駆動時間を設定するタイマ３３からの
指令信号と、前記ポンプ２３の駆動時間を設定するタイ
マ３４からの指令信号に基づき、ポンプ１６，２３を駆
動制御する。The controller 32 (driving control means) drives and controls the pumps 16 and 23 based on the upper limit water level detection signal from the upper limit water level sensor 30 and the lower limit water level detection signal from the lower limit water level sensor 31. When the water level of the nitrification processing unit 3 is in the water level setting range between the upper limit water level and the lower limit water level, the controller 32 stops the pumps 16 and 23. When the water level of the nitrification processing unit 3 rises and the upper limit water level sensor 30 detects the upper limit water level of the nitrification processing unit 3, the controller 32 drives the pump 23 in the stopped state based on the upper limit water level detection signal. Therefore, the water level of the nitrification processing unit 3 is lowered, and the controller 32 stops the pump 23. When the water level of the nitrification processing unit 3 is lowered and the lower limit water level sensor 31 detects the lower limit water level of the nitrification processing unit 3, the controller 32 drives the pump 16 in the stopped state based on the lower limit water level detection signal. Therefore, the water level of the nitrification processing unit 3 rises, and the controller 32 stops the pump 16. In addition, when the fluctuation of the inflow sewage 8 is clear to some extent, the controller 32 (drive control means)
The pumps 16 and 23 are drive-controlled based on a command signal from a timer 33 that sets the drive time of the pump 16 and a command signal from a timer 34 that sets the drive time of the pump 23.
【００３０】上記ポンプ１６，２３の駆動制御により、
硝化処理部３の水位を上限水位と下限水位との間の水位
設定範囲に保ち易くなる。そのため、前記堰１４による
第一流入路１２の流入量調節と前記堰２１による第一流
出路１９の流出量調節とにより、硝化処理部３の水位は
上限水位と下限水位との間の水位設定範囲で増減する。
従って、硝化処理部３では、処理汚水１１をより一層効
率良く硝化して硝化汚泥を含む処理汚水１８に変えるこ
とができる。By controlling the drive of the pumps 16 and 23,
It becomes easy to maintain the water level of the nitrification treatment unit 3 within the water level setting range between the upper limit water level and the lower limit water level. Therefore, the water level of the nitrification treatment unit 3 is set to a water level setting range between the upper limit water level and the lower limit water level by adjusting the inflow amount of the first inflow passage 12 by the weir 14 and the outflow amount of the first outflow passage 19 by the weir 21. Increase or decrease with.
Therefore, in the nitrification treatment section 3, the treated sewage 11 can be converted into the treated sewage 18 containing the nitrification sludge by nitrifying the treated sewage 11 more efficiently.
【図１】 本実施形態にかかる汚水処理装置を示すシス
テム図である。FIG. 1 is a system diagram showing a sewage treatment apparatus according to this embodiment.
【図２】 上記汚水処理装置の前処理部である嫌気処理
部において耐気性部で流入汚水と硝化汚泥との混合状態
を概略的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing a mixed state of inflowing sewage and nitrifying sludge in an anaerobic treatment section which is a pretreatment section of the sewage treatment apparatus.
【図３】 上記汚水処理装置において硝化処理部への流
入側の堰を概略的に示す断面図である。FIG. 3 is a cross-sectional view schematically showing a weir on the inflow side to the nitrification treatment section in the wastewater treatment device.
【図４】 上記汚水処理装置において硝化処理部からの
流出側の堰を概略的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing a weir on the outflow side from the nitrification treatment section in the sewage treatment apparatus.
１…耐気性部（前処理部）、２…絶対嫌気性部（前処理
部）、３…硝化処理部、４…固液分離部、８…流入汚
水、９…処理汚泥、１０…混合液、１１…処理汚水、１
２…第一流入路、１３…第二流入路、１４…堰（流入量
調節手段としての開口面積調節手段）、１６…ポンプ
（流入量調節手段としての水位調節手段）、１７…攪拌
部（攪拌手段）、１８…処理汚水、１９…第一流出路、
２０…第二流出路、２１…堰（流出量調節手段としての
開口面積調節手段）、２３…ポンプ（流出量調節手段と
しての水位調節手段）、２４…処理水、２６…ハーブ水
路（処理水流出部）、２８…送風機（空気供給手段）、
Ｓ…開口面積。DESCRIPTION OF SYMBOLS 1 ... Air-resistant part (pretreatment part), 2 ... Absolute anaerobic part (pretreatment part), 3 ... Nitrification treatment part, 4 ... Solid-liquid separation part, 8 ... Inflow sewage, 9 ... Treated sludge, 10 ... Mixed liquid , 11 ... Treated sewage, 1
2 ... 1st inflow path, 13 ... 2nd inflow path, 14 ... Weir (opening area adjusting means as inflow amount adjusting means), 16 ... Pump (water level adjusting means as inflow amount adjusting means), 17 ... Stirring part ( (Stirring means), 18 ... treated wastewater, 19 ... first outflow passage,
20 ... Second outflow passage, 21 ... Weir (opening area adjusting means as outflow amount adjusting means), 23 ... Pump (water level adjusting means as outflow amount adjusting means), 24 ... Treated water, 26 ... Herb canal (treated water) Outflow part), 28 ... Blower (air supply means),
S ... Opening area.
Claims (9)
よりその流入汚水を分解処理する嫌気処理を少なくとも
行う前処理部と、この前処理部からの処理汚水を硝化し
て硝化汚泥を含む処理汚水に変える硝化処理部とを備え
たことを特徴とする汚水処理装置。1. A pretreatment unit for performing at least an anaerobic treatment for decomposing the influent wastewater by activating microorganisms in the influent wastewater, and a treated wastewater from the pretreatment unit is nitrified into a treated wastewater containing nitrifying sludge. A sewage treatment apparatus comprising a changing nitrification treatment unit.
を接触させる一次処理と、この一次処理がなされた混合
液に対し微生物を働かせることにより、代謝生産物を経
て、この混合液を分解処理する二次処理とを行う嫌気処
理部である前処理部と、 この前処理部からの処理汚水を硝化して硝化汚泥を含む
処理汚水に変える硝化処理部とを備えたことを特徴とす
る汚水処理装置。2. A primary treatment in which microorganisms are brought into contact with a mixed liquid of inflowing wastewater and sludge, and microorganisms are allowed to act on the mixed liquid subjected to the primary treatment, whereby the mixed liquid is decomposed through a metabolic product. A pretreatment unit that is an anaerobic treatment unit that performs a secondary treatment to be treated, and a nitrification treatment unit that nitrifies the treated wastewater from the pretreatment unit to convert it to treated wastewater containing nitrifying sludge. Sewage treatment equipment.
硝化汚泥含有処理汚泥と処理水とに分離し、その処理汚
泥を前記前処理部に返送する固液分離部を備えているこ
とを特徴とする請求項１または請求項２に記載の汚水処
理装置。3. A solid-liquid separation unit that separates the treated sludge treated by the nitrification treatment unit into treated sludge containing nitrification sludge and treated water, and returns the treated sludge to the pretreatment unit. The sewage treatment apparatus according to claim 1 or 2, which is characterized.
接触させる処理水流出部を備えたことを特徴とする請求
項３に記載の汚水処理装置。4. The sewage treatment apparatus according to claim 3, further comprising a treated water outflow unit for bringing treated water from the solid-liquid separation unit into contact with herbs.
に変える硝化処理部を備え、この硝化処理部において、
前記汚水が入る流入路には流入量調節手段を設けるとと
もに、前記硝化汚泥を含む処理汚水が出る流出路には流
出量調節手段を設け、この流入量調節手段と流出量調節
手段との間で硝化処理部内に攪拌手段を設けたことを特
徴とする汚水処理装置。5. A nitrification treatment unit is provided, which converts nitrification wastewater into treated wastewater containing nitrification sludge, and in this nitrification treatment unit,
An inflow rate adjusting means is provided in the inflow path for the wastewater, and an outflow rate adjusting means is provided in the outflow path for the treated wastewater containing the nitrifying sludge, and between the inflow rate adjusting means and the outflow rate adjusting means. A sewage treatment apparatus characterized in that a stirring means is provided in the nitrification treatment section.
からの処理汚水が入る流入路には流入量調節手段を設け
るとともに、前記硝化汚泥を含む処理汚水が出る流出路
には流出量調節手段を設け、この流入量調節手段と流出
量調節手段との間で硝化処理部内に攪拌手段を設けたこ
とを特徴とする請求項１から請求項４のうちいずれかの
請求項に記載の汚水処理装置。6. In the nitrification treatment section, an inflow amount adjusting means is provided in an inflow passage for the treated wastewater from the pretreatment portion, and an outflow amount adjusting means is provided in an outflow passage for the treated wastewater containing the nitrification sludge. The sewage treatment according to any one of claims 1 to 4, characterized in that a stirrer is provided in the nitrification treatment section between the inflow rate adjusting means and the outflow rate adjusting means. apparatus.
列に接続した第一流入路と第二流入路とを備え、前記流
入量調節手段は、この第一流入路の開口面積を調節する
開口面積調節手段と、硝化処理部内の水位に応じてこの
第二流入路の流入量を調節する水位調節手段とを備え、 前記流出路は硝化処理部に対し互いに並列に接続した第
一流出路と第二流出路とを備え、前記流出量調節手段
は、この第一流出路の開口面積を調節する開口面積調節
手段と、硝化処理部内の水位に応じてこの第二流出路の
流出量を調節する水位調節手段とを備えていることを特
徴とする請求項５または請求項６に記載の汚水処理装
置。7. The inflow path includes a first inflow path and a second inflow path connected in parallel to the nitrification processing section, and the inflow amount adjusting means adjusts an opening area of the first inflow path. An opening area adjusting means and a water level adjusting means for adjusting the inflow rate of the second inflow path according to the water level in the nitrification processing section are provided, and the outflow path is a first outflow path connected in parallel to the nitrification processing section. A second outflow passage is provided, and the outflow amount adjusting means adjusts the outflow amount of the second outflow passage according to the water level in the nitrification treatment unit and the opening area adjusting means for adjusting the opening area of the first outflow passage. The sewage treatment apparatus according to claim 5 or 6, further comprising a water level adjusting means.
手段を設けたことを特徴とする請求項１から請求項７の
うちいずれかの請求項に記載の汚水処理装置。8. The sewage treatment apparatus according to any one of claims 1 to 7, further comprising air supply means for supplying air into the nitrification treatment section.
に変える硝化処理部を備え、この硝化処理部の硝化汚泥
は、活性汚泥数（ＭＬＳＳ）が１リットルあたり平均４
５００ｍｇ以上７０００ｍｇ以下である第一条件と、ペ
ーハー値（ＰＨ）が平均６．５以上６．７以下である第
二条件と、溶存酸素値（ＤＯ）が１リットルあたり平均
０．２ｍｇ以上０．５ｍｇ以下である第三条件とのう
ち、第一条件と第二条件とを有するか、または、第一条
件と第三条件とを有するものであることを特徴とする汚
水処理装置。9. A nitrification treatment section for converting sewage into treatment wastewater containing nitrification sludge, wherein the nitrification sludge in this nitrification treatment section has an average number of activated sludge (MLSS) of 4 per liter.
The first condition is 500 mg or more and 7,000 mg or less, the second condition is that the pH value (PH) is 6.5 or more and 6.7 on average, and the dissolved oxygen value (DO) is 0.2 mg or more and 0.1. A sewage treatment apparatus characterized by having the first condition and the second condition or having the first condition and the third condition among the third conditions of 5 mg or less.
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|---|---|---|---|
| JP2002116407A JP2003311296A (en) | 2002-04-18 | 2002-04-18 | Sewage treatment apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002116407A JP2003311296A (en) | 2002-04-18 | 2002-04-18 | Sewage treatment apparatus |
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| Publication Number | Publication Date |
|---|---|
| JP2003311296A true JP2003311296A (en) | 2003-11-05 |
| JP2003311296A5 JP2003311296A5 (en) | 2004-11-11 |
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ID=29534010
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926020A (en) * | 2015-05-21 | 2015-09-23 | 徐强富 | Bacteria-modified rapid purification method for municipal sewage |
-
2002
- 2002-04-18 JP JP2002116407A patent/JP2003311296A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926020A (en) * | 2015-05-21 | 2015-09-23 | 徐强富 | Bacteria-modified rapid purification method for municipal sewage |
| CN104926020B (en) * | 2015-05-21 | 2017-02-01 | 徐强富 | Bacteria-modified rapid purification method for municipal sewage |
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