JP2001062493A - Sludge treatment equipment - Google Patents
Sludge treatment equipmentInfo
- Publication number
- JP2001062493A JP2001062493A JP23714299A JP23714299A JP2001062493A JP 2001062493 A JP2001062493 A JP 2001062493A JP 23714299 A JP23714299 A JP 23714299A JP 23714299 A JP23714299 A JP 23714299A JP 2001062493 A JP2001062493 A JP 2001062493A
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- sludge
- reaction tank
- pump
- tank
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 65
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000005273 aeration Methods 0.000 claims abstract description 15
- 238000005374 membrane filtration Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims abstract description 4
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 238000004065 wastewater treatment Methods 0.000 description 7
- 239000006260 foam Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005276 aerator Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Landscapes
- Treatment Of Sludge (AREA)
Abstract
(57)【要約】
【課題】 オゾン処理時の発砲対策を有する汚泥処理装
置を提供する。
【解決手段】 汚泥を受入れる円筒状のオゾン反応槽１
と、オゾン反応槽１から汚泥を抜き出し、それを反応槽
１に接線方向に流入するように戻して、反応槽１内に旋
回流を起させる旋回流用ポンプ４と、上記旋回流用ポン
プ４のサクション側にオゾンを注入するオゾン注入管５
と、ばっ気部９ａと越流部９ｂとを有し、オゾン反応槽
１から流出する汚泥を受入れる好気性処理槽９と、好気
性処理槽９内のばっ気部９ａ内に浸漬して汚泥から濾過
水を吸引する膜濾過装置１３と、膜濾過装置１３で吸引
された濾過水をオゾン反応槽１上部に設けられた消泡ス
プレー１９に送水する消泡用ポンプ１８とを有してな
る。
(57) [Summary] [PROBLEMS] To provide a sludge treatment apparatus having measures against firing during ozone treatment. SOLUTION: A cylindrical ozone reactor 1 for receiving sludge.
The sludge is extracted from the ozone reaction tank 1 and returned to the reaction tank 1 so as to flow in a tangential direction to generate a swirl flow in the reaction tank 1; and the suction of the swirl flow pump 4 Ozone injection tube 5 for injecting ozone into the side
And an aerobic treatment tank 9 having an aeration section 9a and an overflow section 9b for receiving the sludge flowing out of the ozone reaction tank 1, and immersing the sludge in the aeration section 9a in the aerobic treatment tank 9 And a defoaming pump 18 for feeding filtered water sucked by the membrane filtration device 13 to a defoaming spray 19 provided at the top of the ozone reaction tank 1. .
Description
【０００１】[0001]
【発明の属する技術分野】本発明は排水処理場で発生す
る汚泥の減容化を図る汚泥処理装置に関する。The present invention relates to a sludge treatment apparatus for reducing the volume of sludge generated in a wastewater treatment plant.
【０００２】[0002]
【従来の技術】下水の活性汚泥処理施設などからは大量
の下水汚泥、余剰活性汚泥や生汚泥などの有機性汚泥が
発生しており、それらの発生量は下水道の施設の拡充に
伴って増大しつつあり、現在、その増大する有機性汚泥
の処分が大きな問題となっている。従来、有機性汚泥は
脱水助剤を添加し、遠心分離機、ベルトプレスなどの脱
水機で含水率７０〜８０％に脱水された後、埋立て処分
あるいは乾燥され、焼却処分されているが、汚泥が大量
の場合には、脱水機および焼却炉が大規模なものにな
り、設備費、維持管理費などが多大の額となり、焼却処
分は経済的にも困難のものとなっている。2. Description of the Related Art A large amount of organic sludge such as sewage sludge, surplus activated sludge and raw sludge is generated from sewage activated sludge treatment facilities, and the amount of the generated sludge increases with expansion of sewage facilities. At present, disposal of the growing organic sludge has become a major problem. Conventionally, organic sludge is added to a dehydration aid, dewatered to a water content of 70 to 80% by a dehydrator such as a centrifuge or a belt press, and then landfilled or dried and incinerated. When the amount of sludge is large, the dehydrator and the incinerator become large-scale, and the equipment cost, the maintenance and management cost, etc. become large, and the incineration disposal becomes economically difficult.
【０００３】このような汚泥を減容化する技術として、
汚泥にオゾンを添加して化学酸化により可溶化する技術
が注目されている（特開平７−８０５００号 特開平９
−１３６１００など）。すなわち、オゾンは強力な酸化
力を持っており、微生物の細胞壁を破壊し、汚泥を部分
的に可溶化しＢＯＤ化して減容する。As a technology for reducing the volume of such sludge,
A technique of adding ozone to sludge to solubilize it by chemical oxidation has attracted attention (Japanese Patent Laid-Open No. 7-80500, Japanese Patent Laid-Open No. 9-80500).
-136100). That is, ozone has a strong oxidizing power, destroys the cell wall of microorganisms, partially solubilizes sludge, converts it into BOD, and reduces its volume.
【０００４】[0004]
【発明が解決しようとする課題】このようなオゾン処理
に用いるオゾンは、酸素をオゾナイザに送り、濃度１％
程度のオゾンガスとして汚泥に吹込むものであるが、オ
ゾン処理時に著しく発泡することがある。そのためオゾ
ン反応槽よりも泡対策用のスペースの方が大きくなるケ
ースもあった。特開平７−８０５００号には、オゾン処
理と膜分離を組合せた技術、特開平９−１３６１００号
には、オゾン処理と好気性処理と固液分離手段とを組合
せた技術がそれぞれ開示されているが、泡処理について
は何ら言及されていない。The ozone used in such an ozone treatment sends oxygen to an ozonizer and has a concentration of 1%.
Although this is blown into sludge as ozone gas to a certain extent, it may foam significantly during ozone treatment. Therefore, in some cases, the space for foam measures is larger than the ozone reaction tank. JP-A-7-80500 discloses a technique combining ozone treatment and membrane separation, and JP-A-9-136100 discloses a technique combining ozone treatment, aerobic treatment and solid-liquid separation means. However, there is no mention of foam treatment.
【０００５】本発明は従来技術のかかる問題点に鑑み案
出されたもので、オゾン処理時の発泡対策を有する汚泥
処理装置を提供することを目的とする。[0005] The present invention has been devised in view of such problems of the prior art, and has as its object to provide a sludge treatment apparatus having measures against foaming during ozone treatment.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
本発明の汚泥処理装置は、汚泥を受入れる円筒状のオゾ
ン反応槽と、オゾン反応槽から汚泥を抜き出し、それを
反応槽に接線方向に流入するように戻して、反応槽内に
旋回流を起させる旋回流用ポンプと、上記旋回流用ポン
プのサクション側にオゾンを注入するオゾン注入管と、
ばっ気部と越流部とを有し、オゾン反応槽から流出する
汚泥を受入れる好気性処理槽と、好気性処理槽内のばっ
気部内に浸漬して汚泥から濾過水を吸引する膜濾過装置
と、膜濾過装置で吸引された濾過水をオゾン反応膜上部
に設けられた消泡スプレーに送水する消泡用ポンプとを
有してなるものである。In order to achieve the above object, a sludge treatment apparatus according to the present invention comprises a cylindrical ozone reaction tank for receiving sludge, extracting sludge from the ozone reaction tank, and tangentially feeding the sludge to the reaction tank. A swirl pump for returning to flow and causing a swirl flow in the reaction tank, an ozone injection pipe for injecting ozone to the suction side of the swirl flow pump,
An aerobic treatment tank that has an aeration section and an overflow section and receives sludge flowing out of an ozone reaction tank, and a membrane filtration device that is immersed in the aeration section of the aerobic treatment tank and sucks filtered water from the sludge. And a defoaming pump for feeding filtered water sucked by the membrane filtration device to a defoaming spray provided above the ozone reaction membrane.
【０００７】上記旋回流用ポンプは渦流ポンプであるこ
とが好ましい。The swirl pump is preferably a vortex pump.
【０００８】次に、本発明の作用を説明する。汚泥に注
入するオゾンは、先に述べたように酸素ガス中に低濃度
で含まれているものであり、酸素は水に不溶性なので汚
泥中に注入すると多量の気泡が発生する。汚泥はオゾン
との反応により粘性が高くなることが多いので発生した
気泡は汚泥と分離・浮上してオゾン反応槽の気相中に放
散されにくく、むしろ汚泥とともに粘調な泡の層を形成
することがあるが、オゾン反応槽内を旋回流にしてアジ
テーションすることにより、気泡は容易に浮上してオゾ
ン反応槽の気相中に放散される。Next, the operation of the present invention will be described. As described above, the ozone to be injected into the sludge is contained in the oxygen gas at a low concentration. Since oxygen is insoluble in water, a large amount of bubbles are generated when the ozone is injected into the sludge. Since the sludge often becomes viscous due to the reaction with ozone, the generated bubbles are separated and floated from the sludge and are not easily diffused into the gas phase of the ozone reaction tank, but rather form a viscous foam layer with the sludge. However, by agitating the swirling flow in the ozone reaction tank, the bubbles easily float and are diffused into the gas phase of the ozone reaction tank.
【０００９】一方、このように気泡が速やかに浮上して
気相中に放散されると、オゾンの溶解効率が低下する
が、オゾン反応槽内の液を渦流ポンプ経由で循環させ、
ポンプのサクション側のポンプ羽根付近にオゾンを吹き
込み、オゾンと汚泥との混合を良くするので、上記のオ
ゾン溶解効率の低下の問題は解決する。[0009] On the other hand, when the air bubbles quickly float and dissipate in the gas phase, the efficiency of dissolving ozone is reduced. However, the liquid in the ozone reaction tank is circulated through a vortex pump.
Since ozone is blown into the vicinity of the pump blade on the suction side of the pump to improve the mixing of the ozone and the sludge, the above-described problem of the decrease in the ozone dissolving efficiency is solved.
【００１０】オゾン反応槽の後工程に、溶出有機物を浄
化する好気性処理槽を設け、そのばっ気部内に浸漬した
膜濾過装置で吸引した濾過水を、オゾン反応槽の消泡水
に用いたので、消泡用の水を他から供給する場合に比べ
て汚泥処理装置の水量負荷の増加がない。An aerobic treatment tank for purifying eluted organic matter is provided in the subsequent step of the ozone reaction tank, and the filtered water sucked by the membrane filtration device immersed in the aeration section is used as defoaming water in the ozone reaction tank. Therefore, there is no increase in the water load of the sludge treatment device as compared with the case where defoaming water is supplied from another source.
【００１１】好気性処理槽に越流部を設け、越流後の部
分に消泡剤を添加するので、好気性微生物に悪影響がな
い。Since the overflow section is provided in the aerobic treatment tank and the defoaming agent is added to the section after the overflow, there is no adverse effect on the aerobic microorganisms.
【００１２】[0012]
【発明の実施の形態】以下、本発明の１実施形態につい
て図面を参照しつつ説明する。図１は本発明の汚泥処理
装置の排水処理場との関係を示すフローシートであり、
図３は本発明の汚泥処理装置のフローシートであり、図
４はオゾン反応槽１の平面断面図である。これらの図に
おいて、１は密閉された円筒状のオゾン反応槽である。
２は汚泥流入管で、オゾン反応槽１の側壁に設けられた
汚泥流入口２ａに接続されており、排水処理場で発生し
た汚泥が流入する。３は循環ラインでありオゾン反応槽
１の側壁下部に設けた吸入口３ａから反応槽１内の汚泥
を抜き出し、渦流ポンプ（旋回流用ポンプ）４で昇圧
し、再び反応槽１の側壁に設けた吐出口３ｂを経て反応
槽１内に戻す。吸入口３ａと吐出口３ｂとは、図４に示
すように反応槽１の側壁に接線方向に取り付けられてお
り、循環ライン３により反応槽１内に旋回流を起すよう
になっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a flow sheet showing the relationship between the sludge treatment apparatus of the present invention and a wastewater treatment plant,
FIG. 3 is a flow sheet of the sludge treatment apparatus of the present invention, and FIG. 4 is a plan sectional view of the ozone reactor 1. In these figures, reference numeral 1 denotes a closed cylindrical ozone reaction tank.
Reference numeral 2 denotes a sludge inflow pipe, which is connected to a sludge inlet 2a provided on a side wall of the ozone reaction tank 1, and into which sludge generated in a wastewater treatment plant flows. Reference numeral 3 denotes a circulation line, which draws sludge from the reaction tank 1 through a suction port 3a provided at a lower portion of the side wall of the ozone reaction tank 1, pressurizes the sludge with a vortex pump (swirling flow pump) 4, and installs the sludge again on the side wall of the reaction tank 1. It is returned into the reaction tank 1 via the discharge port 3b. The suction port 3 a and the discharge port 3 b are tangentially attached to the side wall of the reaction tank 1 as shown in FIG. 4, and generate a swirling flow in the reaction tank 1 by the circulation line 3.
【００１３】渦流ポンプ４は図２に示すような構造にな
っている。図２（Ａ）は羽根車の斜視図であり、（Ｂ）
は断面図であり、（Ｃ）は（Ｂ）のＡ−Ａ矢視断面図で
ある。渦流ポンプ４は外周に沿って放射状のみぞを持つ
回転円板状の羽根車を有している。羽根のみぞから周速
に近い旋回速度を持って飛び出す液体は、その運動量を
混合室内の液体に与えて回転方向に液体を昇圧する。そ
のような作用をたくさんのみぞが同時に行うので、液体
はケーシングの混合室内を渦流（循環流）となってスパ
イラル状に進行し、吐出口から排出する。渦流ポンプ４
は効率は低いが高い圧力上昇が得られるとともに、気体
が混合した液に対してもキャビテーションやエアロック
を起こしにくい特性がある。The vortex pump 4 has a structure as shown in FIG. FIG. 2A is a perspective view of the impeller, and FIG.
Is a cross-sectional view, and (C) is a cross-sectional view taken along line AA of (B). The vortex pump 4 has a rotating disk-shaped impeller having radial grooves along its outer circumference. The liquid that jumps out from the groove of the blade with a swirling speed close to the peripheral speed gives its momentum to the liquid in the mixing chamber, and pressurizes the liquid in the rotation direction. Since many grooves perform such an action at the same time, the liquid forms a vortex (circulation flow) in the mixing chamber of the casing, spirally advances, and is discharged from the discharge port. Swirl pump 4
Has a low efficiency but a high pressure rise, and also has a characteristic that cavitation and airlock hardly occur even in a liquid mixed with gas.
【００１４】５はオゾン流入管であり、図示しないオゾ
ナイザで発生したオゾンをオゾン注入口５ａを経て、渦
流ポンプ４のサクション側から羽根車に望んで注入す
る。オゾンは酸素をオゾナイザによりその１部をオゾン
化したガスで、通常１％程度の有効濃度を有している。
注入されたオゾンは渦流ポンプ４で羽根車により微細な
気泡となって汚泥中に混入する。Reference numeral 5 denotes an ozone inflow pipe, which injects ozone generated by an ozonizer (not shown) from the suction side of the vortex pump 4 into the impeller through an ozone inlet 5a. Ozone is a gas in which oxygen is partially ozonized by an ozonizer, and usually has an effective concentration of about 1%.
The injected ozone is converted into fine bubbles by the impeller by the vortex pump 4 and mixed into the sludge.
【００１５】６は反応槽１の下部付近の側壁から一旦横
へ出て立上る水封部であり、その上方に設けた流出口６
ａに流出ライン７が接続されている。水封部６の上部は
開放されていてもよいし、盲板を設けてもよい。反応槽
１の上部にはオゾン排出ライン８が接続されており、余
剰のオゾンは図示しないオゾンキラーに送られる。Numeral 6 denotes a water seal portion which rises out of the side wall near the lower portion of the reaction tank 1 and rises sideways.
The outflow line 7 is connected to a. The upper part of the water sealing part 6 may be open or a blind plate may be provided. An ozone discharge line 8 is connected to an upper part of the reaction tank 1, and surplus ozone is sent to an ozone killer (not shown).
【００１６】９は好気性処理槽である。好気性処理溝９
はばっ気部９ａと越流部９ｂとを有しており、ばっ気部
９ａと越流部９ｂとの間に越流堰１０が設けられてい
る。ばっ気部９ａにはオゾン反応槽１からの汚泥が流入
する。ばっ気部９ａの底部には空気を吹き出す散気管１
２が設けられており、散気管１２にはブロワ１１が接続
されている。１３は膜濾過装置であり、散気管１２の上
方に設けられている。膜濾過装置１３は１対のヘッダ１
３ａの間に多数の半透膜製で直径が１ｍｍ程度の細管１
３ｂが張設された構造をしており、両方のヘッダ１３ａ
から吸引することにより、濾過液が細管１３ｂ内に侵入
し、細管１３ｂからヘッダ１３ａに流入する。１５は吸
引ポンプであり、吸引ライン１４によりサクション側が
膜濾過装置１３に接続されている。１６は消泡水槽であ
り、膜濾過装置１３からの濾過液を受入れる。１８は消
泡ポンプで、消泡水槽１６からの濾過液を、オゾン反応
槽１内上部に設けられた消泡ノズル１９に圧送する。膜
濾過装置１３で濾過された濾過液中には可溶性の有機物
を含んでいるので、消泡ノズル１９で使用して余った分
は返送ライン２３を経て排水処理場に返送し、活性汚泥
処理される。なお、２２は消泡水槽のオーバーフロー管
である。Reference numeral 9 denotes an aerobic treatment tank. Aerobic groove 9
The aerator 9 has an aeration section 9a and an overflow section 9b, and an overflow weir 10 is provided between the aeration section 9a and the overflow section 9b. Sludge from the ozone reactor 1 flows into the aeration section 9a. A diffuser tube 1 for blowing air is provided at the bottom of the aeration section 9a.
The blower 11 is connected to the air diffuser 12. Reference numeral 13 denotes a membrane filtration device, which is provided above the air diffuser 12. The membrane filtration device 13 includes a pair of headers 1
3a, a large number of thin tubes 1 made of semipermeable membrane and having a diameter of about 1 mm.
3b is extended, and both headers 13a
, The filtrate enters the thin tube 13b and flows into the header 13a from the thin tube 13b. Reference numeral 15 denotes a suction pump whose suction side is connected to the membrane filtration device 13 by a suction line 14. Reference numeral 16 denotes a defoaming water tank that receives a filtrate from the membrane filtration device 13. Reference numeral 18 denotes a defoaming pump which pumps the filtrate from the defoaming water tank 16 to a defoaming nozzle 19 provided at an upper part in the ozone reaction tank 1. Since the filtrate filtered by the membrane filtration device 13 contains a soluble organic substance, the surplus used by the defoaming nozzle 19 is returned to a wastewater treatment plant via a return line 23 to be subjected to activated sludge treatment. You. In addition, 22 is an overflow pipe of a defoaming water tank.
【００１７】ばっ気部９ａでも可溶化しなかった汚泥
は、越流堰１０を越えて越流部９ｂに流入する。２０は
消泡剤注入ラインで越流部９ｂの上方に設けられたノズ
ルから消泡剤を噴射する。２１は汚泥抜出しラインで越
流部９ｂ内の汚泥を抜き出し図示しない汚泥処理装置に
送る。The sludge that has not been solubilized in the aeration section 9a flows into the overflow section 9b over the overflow weir 10. Reference numeral 20 denotes an antifoaming agent injection line for injecting an antifoaming agent from a nozzle provided above the overflow section 9b. Reference numeral 21 denotes a sludge extraction line, which extracts the sludge in the overflow section 9b and sends it to a sludge treatment device (not shown).
【００１８】次に、本実施形態の作用を説明する。汚泥
に注入するオゾンは、先に述べたように酸素ガス中に低
濃度で含まれているものであり、酸素は水に不溶性なの
で汚泥中に注入すると多量の気泡が発生する。汚泥はオ
ゾンとの反応により粘性が高くなることが多いので発生
した気泡は汚泥と分離・浮上してオゾン反応槽１の気相
中に放散されにくく、むしろ汚泥とともに粘調な泡の層
を形成することがあるが、オゾン反応槽１内を旋回流に
してアジテーションすることにより、気泡は容易に浮上
してオゾン反応槽１の気相中に放散される。Next, the operation of the present embodiment will be described. As described above, the ozone to be injected into the sludge is contained in the oxygen gas at a low concentration. Since oxygen is insoluble in water, a large amount of bubbles are generated when the ozone is injected into the sludge. Since the sludge often becomes highly viscous due to the reaction with ozone, the generated bubbles are separated and floated from the sludge and are not easily diffused into the gas phase of the ozone reaction tank 1, but rather form a viscous foam layer together with the sludge. However, by agitating the inside of the ozone reaction tank 1 with a swirling flow, the bubbles easily float and are diffused into the gas phase of the ozone reaction tank 1.
【００１９】一方、このように気泡が速やかに浮上し
て、気相中に放散されるとオゾンの溶解効率が低下する
が、オゾン反応槽１内の液を渦流ポンプ４経由で循環さ
せ、渦流ポンプ４のサクション側のポンプ羽根付近にオ
ゾンを吹き込みオゾンと汚泥との混合を良くするので、
上記のオゾン溶解効率の低下の問題は解決する。On the other hand, when the bubbles quickly float and dissipate in the gas phase, the dissolution efficiency of ozone is reduced. However, the liquid in the ozone reaction tank 1 is circulated through the vortex pump 4 and Since ozone is blown into the vicinity of the pump blade on the suction side of the pump 4 to improve the mixing of the ozone and the sludge,
The above-mentioned problem of a decrease in ozone dissolution efficiency is solved.
【００２０】オゾン反応槽１の後工程に、溶出有機物を
酸化し炭酸ガスに分解して浄化する好気処理槽９を設
け、そのばっ気部９ａ内に浸漬した膜濾過装置１３で吸
引した濾過水をオゾン反応槽１の消泡水に用いたので、
消泡用の水を他から供給する場合に比べて汚泥処理装置
の水量負荷の増加がなく、水処理場に送る返送水量が少
ない。In the subsequent step of the ozone reaction tank 1, an aerobic treatment tank 9 for oxidizing the eluted organic matter and decomposing it into carbon dioxide gas for purification is provided, and the filtration sucked by the membrane filtration device 13 immersed in the aeration part 9a. Since water was used for the defoaming water in the ozone reactor 1,
Compared with the case where defoaming water is supplied from another source, there is no increase in the water load of the sludge treatment apparatus, and the amount of water returned to the water treatment plant is small.
【００２１】好気性処理槽９に越流部９ｂを設け、越流
後の部分に消泡剤を添加するので、好気性微生物に影響
がない。Since the overflow section 9b is provided in the aerobic treatment tank 9 and an antifoaming agent is added to a portion after the overflow, the aerobic microorganisms are not affected.
【００２２】本発明は以上述べた実施形態に限定される
ものではなく、発明の要旨を逸脱しない範囲で種々の変
更が可能である。たとえば、旋回流用ポンプは渦流ポン
プであるとして説明したが他の形式のものでもよい。ま
た、膜濾過装置も、中空糸膜でなく平膜でもよい。The present invention is not limited to the embodiment described above, and various changes can be made without departing from the gist of the invention. For example, while the swirl pump has been described as being a swirl pump, it may be of other types. Further, the membrane filtration device may be a flat membrane instead of a hollow fiber membrane.
【００２３】[0023]
【発明の効果】以上説明したように本発明の汚泥処理装
置は次のような優れた効果がある。 （１）オゾン反応槽内で発生した気泡は、旋回流により
容易に気相中に放出されるので、気泡処理のための大が
かりな装置は不要となる。 （２）オゾン反応槽内に消泡のために、スプレーノズル
から噴射する水は好気性処理槽中に浸漬した膜濾過装置
で濾過した濾過液を使用するので、水道水コストを低減
できるし、汚液処理装置の水量負荷を低減でき、さら
に、排水処理場に返送する水量を低減できる。 （３）好気性処理槽はばっ気部と越流部とで構成され、
越流部に消泡剤を添加するようにしたので、消泡剤が好
気性微生物に影響を与えることがない。As described above, the sludge treatment apparatus of the present invention has the following excellent effects. (1) Bubbles generated in the ozone reaction tank are easily released into the gas phase by a swirling flow, so that a large-scale apparatus for bubble treatment is not required. (2) Since water jetted from a spray nozzle is a filtrate filtered by a membrane filtration device immersed in an aerobic treatment tank for defoaming in an ozone reaction tank, tap water cost can be reduced, The amount of water load on the wastewater treatment apparatus can be reduced, and the amount of water returned to the wastewater treatment plant can be reduced. (3) The aerobic treatment tank is composed of an aeration section and an overflow section,
Since the defoamer is added to the overflow section, the defoamer does not affect the aerobic microorganisms.
【図１】本発明の汚泥処理装置の排水処理場との関係を
示すフローシートである。FIG. 1 is a flow sheet showing a relationship of a sludge treatment apparatus of the present invention with a wastewater treatment plant.
【図２】渦流ポンプの構造を示す図である。FIG. 2 is a diagram showing a structure of a vortex pump.
【図３】本発明の汚泥処理装置のフローシートである。FIG. 3 is a flow sheet of the sludge treatment apparatus of the present invention.
【図４】オゾン反応槽の平面断面図である。FIG. 4 is a plan sectional view of an ozone reaction tank.
１ オゾン反応槽 ４ 旋回流用ポンプ ９ 好気性処理槽 ９ａ ばっ気部 ９ｂ 越流部 １３ 膜濾過装置 １８ 消泡ポンプ １９ 消泡ノズル DESCRIPTION OF SYMBOLS 1 Ozone reaction tank 4 Swirling flow pump 9 Aerobic treatment tank 9a Aeration part 9b Overflow part 13 Membrane filtration device 18 Defoaming pump 19 Defoaming nozzle
Claims (2)
と、オゾン反応槽から汚泥を抜き出し、それを反応槽に
接線方向に流入するように戻して、反応槽内に旋回流を
起させる旋回流用ポンプと、上記旋回流用ポンプのサク
ション側にオゾンを注入するオゾン注入管と、ばっ気部
と越流部とを有し、オゾン反応槽から流出する汚泥を受
入れる好気性処理槽と、好気性処理槽内のばっ気部内に
浸漬して汚泥から濾過水を吸引する膜濾過装置と、膜濾
過装置で吸引された濾過水をオゾン反応槽上部に設けら
れた消泡スプレーに送水する消泡用ポンプとを有してな
ることを特徴とする汚泥処理装置。1. A cylindrical ozone reaction tank for receiving sludge, a sludge drawn out of the ozone reaction tank, and returned to flow into the reaction tank in a tangential direction to generate a swirl flow in the reaction tank. A pump, an ozone injection pipe for injecting ozone into the suction side of the swirling flow pump, an aerobic treatment tank having an aeration section and an overflow section, and receiving sludge flowing out of the ozone reaction tank, and an aerobic treatment. A membrane filtration device that immerses the filtrate in sludge by immersing it in the aeration part of the tank, and a defoaming pump that sends the filtered water sucked by the membrane filtration device to the defoaming spray provided at the top of the ozone reaction tank. And a sludge treatment apparatus comprising:
請求項１記載の汚泥処理装置。2. The sludge treatment apparatus according to claim 1, wherein the swirling flow pump is a vortex pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23714299A JP2001062493A (en) | 1999-08-24 | 1999-08-24 | Sludge treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23714299A JP2001062493A (en) | 1999-08-24 | 1999-08-24 | Sludge treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001062493A true JP2001062493A (en) | 2001-03-13 |
Family
ID=17011038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23714299A Pending JP2001062493A (en) | 1999-08-24 | 1999-08-24 | Sludge treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001062493A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007117796A (en) * | 2005-10-25 | 2007-05-17 | Nissei Plant Kk | Equipment for weight reduction of surplus sludge |
| CN114988658A (en) * | 2022-06-28 | 2022-09-02 | 尚迪(南京)生态科技有限公司 | Spiral gas explosion device for water-soaked manure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132598A (en) * | 1985-12-04 | 1987-06-15 | Meidensha Electric Mfg Co Ltd | Treatment of waste water |
| JPH09290286A (en) * | 1996-04-25 | 1997-11-11 | Kubota Corp | Wastewater treatment equipment |
| JPH1015574A (en) * | 1996-07-09 | 1998-01-20 | Kubota Corp | Sewage treatment equipment |
| WO1998003437A1 (en) * | 1996-07-19 | 1998-01-29 | Kurita Water Industries Ltd. | Method and apparatus for biological treatment of waste organic liquid |
-
1999
- 1999-08-24 JP JP23714299A patent/JP2001062493A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132598A (en) * | 1985-12-04 | 1987-06-15 | Meidensha Electric Mfg Co Ltd | Treatment of waste water |
| JPH09290286A (en) * | 1996-04-25 | 1997-11-11 | Kubota Corp | Wastewater treatment equipment |
| JPH1015574A (en) * | 1996-07-09 | 1998-01-20 | Kubota Corp | Sewage treatment equipment |
| WO1998003437A1 (en) * | 1996-07-19 | 1998-01-29 | Kurita Water Industries Ltd. | Method and apparatus for biological treatment of waste organic liquid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007117796A (en) * | 2005-10-25 | 2007-05-17 | Nissei Plant Kk | Equipment for weight reduction of surplus sludge |
| CN114988658A (en) * | 2022-06-28 | 2022-09-02 | 尚迪(南京)生态科技有限公司 | Spiral gas explosion device for water-soaked manure |
| CN114988658B (en) * | 2022-06-28 | 2023-06-02 | 尚迪(南京)生态科技有限公司 | Spiral gas explosion device for water-soaked manure |
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