CN109824219A - Chromium-containing wastewater treatment system and method thereof - Google Patents
Chromium-containing wastewater treatment system and method thereof Download PDFInfo
- Publication number
- CN109824219A CN109824219A CN201910257569.9A CN201910257569A CN109824219A CN 109824219 A CN109824219 A CN 109824219A CN 201910257569 A CN201910257569 A CN 201910257569A CN 109824219 A CN109824219 A CN 109824219A
- Authority
- CN
- China
- Prior art keywords
- sludge
- chromium
- tank
- outlet
- sedimentation basin
- 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
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000011651 chromium Substances 0.000 title claims abstract description 79
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 77
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title abstract description 18
- 239000010802 sludge Substances 0.000 claims abstract description 102
- 239000002351 wastewater Substances 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- 238000002386 leaching Methods 0.000 claims abstract description 53
- 238000004062 sedimentation Methods 0.000 claims abstract description 47
- 238000005273 aeration Methods 0.000 claims abstract description 38
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 36
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 12
- 239000002699 waste material Substances 0.000 claims description 39
- 238000012545 processing Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 230000003750 conditioning effect Effects 0.000 claims description 16
- 239000006228 supernatant Substances 0.000 claims description 16
- 230000001376 precipitating effect Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 230000003311 flocculating effect Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 2
- 150000001844 chromium Chemical class 0.000 abstract 1
- 238000010668 complexation reaction Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000004043 dyeing Methods 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 9
- 239000010985 leather Substances 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000975 dye Substances 0.000 description 3
- 235000018553 tannin Nutrition 0.000 description 3
- 229920001864 tannin Polymers 0.000 description 3
- 239000001648 tannin Substances 0.000 description 3
- 229910001430 chromium ion Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 1
- QFSKIUZTIHBWFR-UHFFFAOYSA-N chromium;hydrate Chemical compound O.[Cr] QFSKIUZTIHBWFR-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
本发明公开了一种含铬废水处理系统及其方法，含铬废水处理系统包括依次相连接的调节池、生化曝气池、第一沉淀池、物化反应池和第二沉淀池；还包括淋滤反应池、高级氧化反应釜、回用铬液储罐和污泥脱水设备；首先在生化曝气池将部分铬吸附在活性污泥的表面，通过活性污泥实现对铬的富集与破络过程，生化曝气池出水再经过物化加药的方式再次降低废水中总铬浓度；再通过淋滤反应池将铬酸根离子及铬的络合物从污泥中淋滤出来，淋滤上清液及污泥脱水设备出水经高级氧化技术将水体中的有机物彻底矿化。在高效除铬的基础上又进一步实现了铬泥无害化与减量化，含铬污泥处置成本削减90％以上，与此同时实现了铬液的资源化回用。
The invention discloses a chromium-containing wastewater treatment system and a method thereof. The chromium-containing wastewater treatment system comprises a regulating tank, a biochemical aeration tank, a first sedimentation tank, a physical and chemical reaction tank and a second sedimentation tank which are connected in sequence; Filter reaction tank, advanced oxidation reaction kettle, reused chromium liquid storage tank and sludge dewatering equipment; firstly, part of chromium is adsorbed on the surface of activated sludge in the biochemical aeration tank, and the enrichment and destruction of chromium are realized through activated sludge. In the process of complexation, the effluent of the biochemical aeration tank is then subjected to physicochemical dosing to reduce the total chromium concentration in the wastewater again; and then the chromate ions and chromium complexes are leached from the sludge through the leaching reaction tank, and the The effluent of the clear liquid and sludge dewatering equipment is thoroughly mineralized by the advanced oxidation technology. On the basis of high-efficiency chromium removal, the harmlessness and reduction of chromium sludge are further realized, the disposal cost of chromium-containing sludge is reduced by more than 90%, and at the same time, the resource reuse of chromium liquid is realized.
Description
Technical field
The invention belongs to field of environment protection, and in particular to a kind of system for processing chrome-containing wastewater and its method.
Background technique
With the rapid development of China's industrial sector, the following problem of environmental pollution is increasingly severe.Especially contain
Have the waste water of heavy metal ion, since the particularity of its water quality hardly results in effective control, some of heavy metals due into
Can people and animals be caused with huge harm after entering environment therefore be put into priority acccess control catalogue.In China, it is preferential that chromium belongs to the first kind
Pollutant is controlled, therefore environmental requirement chromate waste water need to be up to standard in workshop discharge outlet after individually shunting processing,
Leather production process is complicated at present, and a large amount of chemical assistant and heavy metal chromium are added in tannery, these
Material can remain on a small quantity leather surface with heavy metal chromium stable bond inside collagen, and the heavy metal in tanning waste water
Chromium generally can be achieved to be used repeatedly.The metal chromate ion of leather surface and having for chromium after leather enters dyeing workshop section
Machine complex compound falls off, and heavy metal chromium is further reacted with dyestuff to be formed stable complex system and be present in dyeing waste-water.Generally
Total chromium concn is greater than 200mg/L in dyeing waste-water.Existing chromate waste water individually handles the main method for using materialization dosing, this
It plants method higher cost and is difficult to that total chrome content control will be discharged under lower concentration of emission (greater than national standard 1.5mg/L).
Summary of the invention
The purpose of the present invention is to provide a kind of system for processing chrome-containing wastewater and its methods, can be by total Chromium in Waste concentration
It controls in 0.5mg/L hereinafter, the chromium content in chromate waste water is effectively cut down, far below the emission request of national 1.5mg/L.
The present invention is to be achieved through the following technical solutions:
A kind of system for processing chrome-containing wastewater, including conditioning tank, biochemical aeration tank, the first sedimentation basin, physical reaction pond and
Two sedimentation basins；
The outlet of conditioning tank is connected with the entrance of biochemical aeration tank, the outlet of biochemical aeration tank and the entrance of the first sedimentation basin
It is connected, for the sludge outlet tieback of the first sedimentation basin to the entrance of biochemical aeration tank, the liquid outlet of the first sedimentation basin and materialization are anti-
The entrance of Ying Chi is connected, and the outlet in physical reaction pond is connected with the entrance of the second sedimentation basin, and the leakage fluid dram of the second sedimentation basin is used for
Emission compliance waste water；
Conditioning tank is equipped with activated sludge in biochemical aeration tank for storing chromate waste water.
Further, being added in physical reaction pond has coagulated agent, added with flocculating settling agent in the second sedimentation basin.
Further, coagulated agent uses ferrous sulfate.
Further, flocculating settling agent uses PAM.
Further, activated sludge concentration is 3000-5000mg/L, dissolved oxygen 2-3mg/L in biochemical aeration tank, and pH value is
7-8, temperature are 25-35 DEG C.
Further, further include sludge treating block, sludge treating block include leaching reaction tank, advanced oxidation reaction kettle,
Reuse chrome liquor storage tank and device for dehydrating sladge waste；
The entrance of leaching reaction tank is connected with the sludge outlet of the sludge outlet of the first sedimentation basin and the second sedimentation basin, leaching
The sludge outlet of reaction tank is connected with device for dehydrating sladge waste, the liquid outlet of leaching reaction tank and the entrance of advanced oxidation reaction kettle
It is connected, the outlet of advanced oxidation reaction kettle is connected with the entrance of reuse chrome liquor storage tank, and the water outlet tieback of device for dehydrating sladge waste is extremely
The entrance of advanced oxidation reaction kettle, the sludge outlet of device for dehydrating sladge waste is for discharging sludge.
Further, being added in leaching reaction tank has sulfuric acid and hydrogen peroxide.
Further, device for dehydrating sladge waste uses plate and frame filter press.
The invention also discloses the chromium containing waste water treatment methods based on above-mentioned system for processing chrome-containing wastewater, including following step
It is rapid:
(1) chromate waste water is stored in conditioning tank, is adjusted after pH value is 7-8 through conditioning tank and is entered biochemical aeration tank,
Part chromium and chromium complex be by activated sludge absorption in biochemical aeration tank, while by the effect of microorganism by partially stabilized presence
The rock-steady structure contact break of organic matter containing chromium；
(2) enter in the first sedimentation basin through biochemical aeration tank treated chromate waste water and precipitate, be divided into supernatant and precipitating
Sludge, supernatant enter in physical reaction pond, continue in partly precipitated sludge reflux to biochemical aeration tank；
(3) coagulated agent is added into physical reaction pond, after being stirred to react, then flows into the second sedimentation basin, then to
Flocculating settling agent is accessed in two sedimentation basins, is staticly settled after stirring, generates materialized mud and waste water up to standard, and waste water up to standard is via the
The leakage fluid dram of two sedimentation basins discharges.
Further, system for processing chrome-containing wastewater further includes sludge treating block, sludge treating block include leaching reaction tank,
Advanced oxidation reaction kettle, reuse chrome liquor storage tank and device for dehydrating sladge waste；The sludge of the entrance of leaching reaction tank and the first sedimentation basin
The sludge outlet of outlet and the second sedimentation basin is connected, and the sludge outlet of leaching reaction tank is connected with device for dehydrating sladge waste, and leaching is anti-
The liquid outlet of Ying Chi is connected with the entrance of advanced oxidation reaction kettle, outlet and the reuse chrome liquor storage tank of advanced oxidation reaction kettle
Entrance is connected, and the entrance of the water outlet tieback of device for dehydrating sladge waste to advanced oxidizing reactor, the sludge of device for dehydrating sladge waste goes out
Mouth is for discharging sludge comprising following steps:
S1: in above-mentioned steps (2), another part precipitating sludge after the first sedimentation basin precipitating can be discharged periodically, will
Materialized mud in the sludge and above-mentioned steps (3) periodically discharged after the second sedimentation basin precipitating is discharged into leaching reaction tank, to
Leaching medicament is added in leaching reaction tank, leaching comes out from sludge by the complex compound of chromate ion and chromium, drenches after precipitation
Filter supernatant is discharged into advanced oxidation reaction kettle, and sludge enters device for dehydrating sladge waste after aoxidizing；
S2: sludge is after device for dehydrating sladge waste dehydration, and water outlet is then discharged into advanced oxidation reaction kettle, and mud extraction is then from dirt
Mud outlet drain.
Compared with prior art, the invention has the following beneficial technical effects:
System for processing chrome-containing wastewater disclosed by the invention, including being sequentially connected the conditioning tank connect, biochemical aeration tank, first heavy
Shallow lake pond, physical reaction pond, the second sedimentation basin and leaching reaction tank；Part chromium is adsorbed on activated sludge in biochemical aeration tank first
Surface, realize that, to the enrichment of chromium and contact break process, biochemical aeration tank is discharged the side using materialization dosing by activated sludge
Formula reduces total Chromium in Waste concentration again.Dyeing waste-water is after biochemistry adsorbs contact break, and complex state chromium content is reduced in supernatant,
Chromium concn total in water outlet can be controlled in 0.5mg/L after materializing strategy hereinafter, being far below the emission request of country 1.5mg/L.
Further, further include sludge treating block, sludge treating block include leaching reaction tank, advanced oxidation reaction kettle,
Reuse chrome liquor storage tank and device for dehydrating sladge waste；Pass through the leaching from sludge by the complex compound of chromate ion and chromium of leaching reaction tank
Out, leaching supernatant and device for dehydrating sladge waste water outlet are through high-level oxidation technology by the thorough mineralising of organic matter in water body.In height
Chromium mud is innoxious and minimizing, chromium-bearing sludge cost of disposal cut down 90% or more except further realizing on the basis of chromium for effect,
The recycling reuse of chrome liquor is realized at the same time.
Part chromium is adsorbed on activated sludge in biochemical aeration tank first by chromium containing waste water treatment method disclosed by the invention
Surface, enrichment and contact break process to chromium can be achieved since Age of Activated Sludge is longer, and biochemical aeration tank is discharged using materialization
The mode of dosing can control total Chromium in Waste concentration in 0.5mg/L or less.It, will be by increasing the treatment process of biochemical contact break
Entering chromium content in the waste water in physical reaction pond reduces, and the usage amount of materialization coagulated agent reduces 50%-70%, while materialization produces mud
Amount also reduces 40% or more, can effectively cut down the chromium content in chromate waste water, meets the emission request of country.
Further, sludge treatment technique has been added in treatment process, and biochemical chromium mud leaching system is entered after biochemical mud is concentrated
System, by leaching reaction tank, by the complex compound of chromate ion and chromium, the leaching from sludge is come out, so that biochemical mud cake rate containing chromium
Far below dangerous waste standard, leaching supernatant and device for dehydrating sladge waste water outlet are thorough by the organic matter in water body through high-level oxidation technology
Mineralising, while+trivalent chromate ion is converted by+6 valence chromium ions, after advanced oxidation water outlet adds a certain proportion of material
It can be used for leather tannin and retanning workshop section, realize the resource utilization of danger wastes.It realizes in cutting down chromate waste water
When chromium content, while the generation of chromium-bearing sludge is reduced, sufficiently accomplishes that dangerous waste minimizing, Technological Economy and recycling heavy metal chromium are real
Existing resource utilization.Compared with prior art, 50% or more energy conservation is a set of green, energy conservation, efficient novel process technique.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the experimental data figure of the embodiment of the present invention 2；
Fig. 3 is leachate and advanced oxidation outlet effect figure in the embodiment of the present invention 1.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in Figure 1, a kind of system for processing chrome-containing wastewater of the invention, including conditioning tank, biochemical aeration tank, the first precipitating
Pond, physical reaction pond and the second sedimentation basin；The outlet of conditioning tank is connected with the entrance of biochemical aeration tank, the outlet of biochemical aeration tank
It is connected with the entrance of the first sedimentation basin, entrance of the sludge outlet tieback of the first sedimentation basin to biochemical aeration tank, the first sedimentation basin
Liquid outlet be connected with the entrance in physical reaction pond, the outlet in physical reaction pond is connected with the entrance of the second sedimentation basin, second
The leakage fluid dram of sedimentation basin is used for emission compliance waste water；Conditioning tank is equipped with activity dirt for storing chromate waste water in biochemical aeration tank
Mud, being added in physical reaction pond has coagulated agent, added with flocculating settling agent in the second sedimentation basin.
When handling waste water using above-mentioned system for processing chrome-containing wastewater, mainly comprise the steps that
(1) biochemical contact break: chromium-containing dyeing waste water enters after adjusting pH value to 7-8 after conditioning tank with a certain concentration activity
The biochemical aeration tank of sludge, part chromium and its complex compound are by activated sludge absorption in biochemical aeration tank, while biochemical action
It can will the partially stabilized existing rock-steady structure contact break of organic matter containing chromium by the effect of microorganism.It is through continuous experiment research shows that living
Property sludge for chromium and its complex compound adsorbance much higher than adsorbance in Age of Activated Sludge, while by microbiologic population
Composition and active detection confirmation sludge can keep good operating status.Biochemical sludge reflux continues real after the first sedimentation basin
Now to the enrichment of heavy metal chromium, supernatant then flows into materialization reaction tank and is further processed.
(2) materialization dosing: supernatant enters physical reaction pond in step (1), and a small amount of coagulated agent reaction 15- is added
30min, coagulating basin water outlet adjust pH value in 7-8, add flocculating settling agent later.Since dyeing waste-water is broken by biochemical absorption
Network, so chromium content is kept low in supernatant, the usage amount of materialization coagulated agent reduces 50%-70%, while object
Change sludge output and also reduces 40% or more；Meanwhile after biochemical contact break, complex state chromium content is reduced in supernatant, at materialization
Chromium concn total in water outlet can be controlled in 0.5mg/L after reason hereinafter, being far below the emission request of country 1.5mg/L.
More preferably, further include sludge treating block, sludge treating block include leaching reaction tank, advanced oxidation reaction kettle,
Reuse chrome liquor storage tank and device for dehydrating sladge waste；The sludge outlet and the second sedimentation basin of the entrance of leaching reaction tank and the first sedimentation basin
Sludge outlet be connected, the sludge outlet of leaching reaction tank is connected with device for dehydrating sladge waste, the liquid outlet of leaching reaction tank and
The entrance of advanced oxidation reaction kettle is connected, and the outlet of advanced oxidation reaction kettle is connected with the entrance of reuse chrome liquor storage tank, and sludge is de-
The water outlet tieback of wetting system is to the entrance of advanced oxidizing reactor, and the sludge outlet of device for dehydrating sladge waste is for discharging sludge.
It is when treating wastewater, further comprising the steps of when system for processing chrome-containing wastewater includes sludge treating block:
(a) chemical leaching: by the materialization mud generated in the excess sludge periodically discharged in step (1) and step (2) through dense
It is discharged into leaching reaction tank after contracting, two kinds of leaching medicaments of sulfuric acid and hydrogen peroxide are added in leaching reaction tank, in the condition that pH value is 1-3
It is lower that by adequately reaction, by the complex compound of chromate ion and chromium, leaching is come out from sludge.Leaching supernatant is arranged after precipitation
Enter in advanced oxidation reaction kettle, sludge enters device for dehydrating sladge waste afterwards after conditioning.Device for dehydrating sladge waste mud extraction chromium content is far below
National standard can be handled according to normal sludge, and device for dehydrating sladge waste water outlet is then discharged into advanced oxidation reaction kettle.
(b) advanced oxidation: leaching supernatant and device for dehydrating sladge waste water outlet are through high-level oxidation technology by water body in step (3)
In the thorough mineralising of organic matter, while converting+trivalent chromate ion for+6 valence chromium ions.Advanced oxidation water outlet adds one
It can be used for leather tannin and retanning workshop section after the material of certainty ratio, realize the resource utilization of danger wastes.
Embodiment 1
It takes the filtered chromium-containing dyeing waste water of 500mL in 1000mL beaker, pH value is adjusted to 7, is added into beaker
A certain amount of biochemical sludge is simultaneously settled to 1000mL, and activated sludge concentration is between 3000-5000mg/L in holding beaker.
It is aerated in beaker using small-sized aerator, keeps dissolved oxygen between 2-3mg/L, continuous aeration takes out afterwards for 24 hours to expose
Gas head staticly settles.
Biochemical supernatant is taken out, adds ferrous sulfate into waste water in the ratio of 2g/L, adjusting pH value is after stirring 30min
7, adding 2 drop mass concentrations is millesimal PAM, is gently mixed and staticly settles.
Materialized mud is separately added into two kinds of reagents of sulfuric acid and hydrogen peroxide after filter paper filters and carries out leaching.Leachate is through advanced
Deposit is to reuse after oxidation.Chromium-bearing sludge after leaching in liquid containing the organic matter of large amount of complex, these different structures have
The presence of machine object influences whether the recycling reuse of chrome liquor, therefore uses the method for advanced oxidation by stable bond in organic matter
Crome metal releases, while the more thorough mineralising of organic matter, further the good recycling for realizing chrome liquor.Such as Fig. 3
Shown, the liquid chromium content from the point of view of case implementation result after leaching is higher, and leachate color is then due in organic dyestuff
Dark-brown is presented in the presence of consistent with dyeing waste-water in complicated colour developing and auxochrome group, and organic structure is broken in water outlet after advanced oxidation
Blue-green bad and that significant trivalent chromic ion is presented.
In experiment, total chromium concn is discharged after biochemistry absorption and cuts down 50% or more, after bio-chemical effluent is carried out physico-chemical precipitation
Total chromium concn is less than 0.5mg/L, far below national emission request；Rate containing chromium is lower than 5mg/Kg to materialization mud in sludge after leaching,
Lower than national dangerous waste standard.
Embodiment 2
Live continuous experiment is carried out in certain fur manufacturing enterprise, enterprise's chromium-containing dyeing total Chromium in Waste concentration is in 250mg/
L or so, CODCrBetween 2500-3000mg/L.Control biochemical aeration tank sludge concentration is 3000-5000mg/L, and dissolved oxygen is
2-3mg/L, pH value 7-8, temperature are 25-35 DEG C, and aeration is discharged COD afterwards for 24 hoursCrReduction rate is greater than 40%, and total chromium reduction rate is big
In 50%.Supernatant carries out materialization dosing precipitating to bio-chemical effluent after precipitation, is discharged total chromium concn less than 0.5mg/L, and materialization
Mud rate containing chromium after leaching in two hours is lower than 5mg/Kg.Maintain good treatment effect, and mistake continuous circulation experiment five times
Cheng Zhongwei replaces biochemical sludge.It is as shown in Fig. 2 factory's field test data figure.
Due to joined a large amount of dyestuff and dyeing assistant in dyeing course again, the chromium in dyeing waste-water is difficult to reality
Now recycle.After sludge treating block is handled, the sludge rate containing chromium finally discharged is far below dangerous waste mark lower than 5mg/Kg
Standard can be handled according to normal sludge, advanced oxidation water outlet add after a certain proportion of material can be used for leather tannin with
Retanning workshop section realizes the resource utilization of danger wastes.
Existing chromate waste water processing can also generate a large amount of hazardous waste sludge containing chromium and bring huge cost of disposal and be easy
Secondary pollution is formed, the present invention can reduce the generation of chromium-bearing sludge, sufficiently accomplish dangerous waste minimizing, Technological Economy, further
It recycles heavy metal chromium and realizes resource utilization.
Claims (10)
1. a kind of system for processing chrome-containing wastewater, which is characterized in that anti-including conditioning tank, biochemical aeration tank, the first sedimentation basin, materialization
Ying Chi and the second sedimentation basin；
The outlet of conditioning tank is connected with the entrance of biochemical aeration tank, the outlet and the entrance phase of the first sedimentation basin of biochemical aeration tank
Even, entrance of the sludge outlet tieback of the first sedimentation basin to biochemical aeration tank, the liquid outlet and physical reaction of the first sedimentation basin
The entrance in pond is connected, and the outlet in physical reaction pond is connected with the entrance of the second sedimentation basin, and the leakage fluid dram of the second sedimentation basin is for arranging
Unconventional and unrestrained mark waste water；
Conditioning tank is equipped with activated sludge in biochemical aeration tank for storing chromate waste water.
2. system for processing chrome-containing wastewater according to claim 1, which is characterized in that being added in physical reaction pond has coagulation medicine
Agent, added with flocculating settling agent in the second sedimentation basin.
3. system for processing chrome-containing wastewater according to claim 2, which is characterized in that coagulated agent uses ferrous sulfate.
4. system for processing chrome-containing wastewater according to claim 2, which is characterized in that flocculating settling agent uses PAM.
5. system for processing chrome-containing wastewater according to claim 1, which is characterized in that activated sludge concentration in biochemical aeration tank
For 3000-5000mg/L, dissolved oxygen 2-3mg/L, pH value 7-8, temperature is 25-35 DEG C.
6. system for processing chrome-containing wastewater described in any one according to claim 1~5, which is characterized in that further include at sludge
Unit is managed, sludge treating block includes leaching reaction tank, advanced oxidation reaction kettle, reuse chrome liquor storage tank and device for dehydrating sladge waste；
The entrance of leaching reaction tank is connected with the sludge outlet of the sludge outlet of the first sedimentation basin and the second sedimentation basin, leaching reaction
The sludge outlet in pond is connected with device for dehydrating sladge waste, the entrance phase of the liquid outlet and advanced oxidation reaction kettle of leaching reaction tank
Even, the outlet of advanced oxidation reaction kettle is connected with the entrance of reuse chrome liquor storage tank, and the water outlet tieback of device for dehydrating sladge waste is supreme
The entrance of grade oxidizing reactor, the sludge outlet of device for dehydrating sladge waste is for discharging sludge.
7. the system for processing chrome-containing wastewater stated according to claim 6, which is characterized in that being added in leaching reaction tank has sulfuric acid and double
Oxygen water.
8. the system for processing chrome-containing wastewater stated according to claim 6, which is characterized in that device for dehydrating sladge waste uses plate compression
Machine.
9. based on the chromium containing waste water treatment method of system for processing chrome-containing wastewater described in Claims 1 to 5 any one, feature
It is, comprising the following steps:
(1) chromate waste water is stored in conditioning tank, is adjusted after pH value is 7-8 through conditioning tank and is entered biochemical aeration tank, in biochemistry
Part chromium and chromium complex be by activated sludge absorption in aeration tank, while existing being contained by the effect of microorganism by partially stabilized
Chromium organic matter rock-steady structure contact break；
(2) enter in the first sedimentation basin through biochemical aeration tank treated chromate waste water and precipitate, be divided into supernatant and precipitating sludge,
Supernatant enters in physical reaction pond, continues in partly precipitated sludge reflux to biochemical aeration tank；
(3) coagulated agent is added into physical reaction pond, after being stirred to react, then flows into the second sedimentation basin, then is heavy to second
Flocculating settling agent is accessed in the pond of shallow lake, is staticly settled after stirring, materialized mud and waste water up to standard are generated, and waste water up to standard is heavy via second
The leakage fluid dram in shallow lake pond discharges.
10. chromium containing waste water treatment method according to claim 9, which is characterized in that system for processing chrome-containing wastewater further includes
Sludge treating block, sludge treating block include leaching reaction tank, advanced oxidation reaction kettle, reuse chrome liquor storage tank and sludge dewatering
Equipment；The entrance of leaching reaction tank is connected with the sludge outlet of the sludge outlet of the first sedimentation basin and the second sedimentation basin, and leaching is anti-
The sludge outlet of Ying Chi is connected with device for dehydrating sladge waste, the entrance phase of the liquid outlet and advanced oxidation reaction kettle of leaching reaction tank
Even, the outlet of advanced oxidation reaction kettle is connected with the entrance of reuse chrome liquor storage tank, and the water outlet tieback of device for dehydrating sladge waste is supreme
The entrance of grade oxidizing reactor, the sludge outlet of device for dehydrating sladge waste is for discharging sludge comprising following steps:
S1: in above-mentioned steps (2), another part precipitating sludge after the first sedimentation basin precipitating can be discharged periodically, will be regular
Materialized mud in the sludge and above-mentioned steps (3) of discharge after the second sedimentation basin precipitating is discharged into leaching reaction tank, to leaching
Leaching medicament is added in reaction tank, leaching comes out from sludge by the complex compound of chromate ion and chromium, after precipitation in leaching
Clear liquid is discharged into advanced oxidation reaction kettle, and sludge enters device for dehydrating sladge waste after aoxidizing；
S2: sludge is after device for dehydrating sladge waste dehydration, and water outlet is then discharged into advanced oxidation reaction kettle, and mud extraction then goes out from sludge
Mouth discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257569.9A CN109824219A (en) | 2019-04-01 | 2019-04-01 | Chromium-containing wastewater treatment system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257569.9A CN109824219A (en) | 2019-04-01 | 2019-04-01 | Chromium-containing wastewater treatment system and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109824219A true CN109824219A (en) | 2019-05-31 |
Family
ID=66873966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910257569.9A Pending CN109824219A (en) | 2019-04-01 | 2019-04-01 | Chromium-containing wastewater treatment system and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109824219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547956A (en) * | 2020-05-25 | 2020-08-18 | 西安优瑞卡环保科技有限公司 | Biochemical method for breaking chromium-containing organic wastewater |
| IT202100023831A1 (en) * | 2021-09-16 | 2023-03-16 | Giorgio Boschi | Chrome recovery process from tanning sludge and a plant. |
| CN118666424A (en) * | 2024-05-06 | 2024-09-20 | 青岛理工大学 | A green and low-carbon treatment technology for chromium-containing wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303940A (en) * | 2011-08-22 | 2012-01-04 | 陕西科技大学 | Method for treating sludge containing trivalent chromium |
| CN107522370A (en) * | 2017-09-11 | 2017-12-29 | 山东农业大学 | A kind of chrome tanning sludge waste liqouor Application way |
-
2019
- 2019-04-01 CN CN201910257569.9A patent/CN109824219A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303940A (en) * | 2011-08-22 | 2012-01-04 | 陕西科技大学 | Method for treating sludge containing trivalent chromium |
| CN107522370A (en) * | 2017-09-11 | 2017-12-29 | 山东农业大学 | A kind of chrome tanning sludge waste liqouor Application way |
Non-Patent Citations (2)
| Title |
|---|
| 熊道陵 等: "《电镀污泥中有价金属提取技术》", 31 October 2013 * |
| 马宏瑞 等: "好氧活性污泥对染色水中铬的吸附研究", 《中国皮革》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547956A (en) * | 2020-05-25 | 2020-08-18 | 西安优瑞卡环保科技有限公司 | Biochemical method for breaking chromium-containing organic wastewater |
| IT202100023831A1 (en) * | 2021-09-16 | 2023-03-16 | Giorgio Boschi | Chrome recovery process from tanning sludge and a plant. |
| CN118666424A (en) * | 2024-05-06 | 2024-09-20 | 青岛理工大学 | A green and low-carbon treatment technology for chromium-containing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7497956B2 (en) | Method for stabilizing and conditioning urban and industrial wastewater sludge | |
| CN110304757A (en) | It is a kind of for handling the technique of arsenic-containing waste water | |
| CN106830536A (en) | A kind of advanced treatment process of ferment antibiotics waste water | |
| Agabo-García et al. | Evaluation of the olive mill wastewater treatment based on advanced oxidation processes (AOPs), flocculation, and filtration | |
| CN101570368A (en) | Method for processing waste water by fenton oxidation | |
| CN101353196A (en) | Fur nitro dyeing wastewater treatment and cyclic utilization method | |
| CN109824219A (en) | Chromium-containing wastewater treatment system and method thereof | |
| CN109179883A (en) | A kind of preprocess method and device for aged consumer waste infiltration liquid | |
| CN102206011A (en) | Coagulation-oxidation combined sewage treatment method | |
| CN105601046A (en) | Domestic sewage treatment method | |
| CN211471183U (en) | Device for treating Fenton iron mud | |
| CN106277649A (en) | Class Fenton technology for paper waste pretreatment | |
| CN100412011C (en) | Coking Wastewater Treatment Method Combining Tetravalent Manganese Compound Oxidation, Chemical Precipitation and Biochemistry | |
| CN105621805B (en) | A kind of garbage burning factory percolate qualified discharge processing system and method | |
| CN111847764A (en) | Method for treating printing and dyeing wastewater based on catalytic oxidation of ozone | |
| CN108358270A (en) | A kind of chemistry in water treatment medicament and preparation method thereof | |
| CN107445403A (en) | A kind of method for cooperateing with processing landfill percolate and burning electricity generation factory percolate | |
| CN102390905B (en) | Advanced treatment device and method of micropolluted organic sewage | |
| CN211770809U (en) | High-pollution degradation-resistant wastewater efficient treatment device | |
| KR20030053498A (en) | The method and equipment of wastewater treatment contained organic compound of high concentration | |
| CN108249696A (en) | A kind of purifying treatment method of comprehensive wastewater | |
| Wang et al. | Sustainable Water and Wastewater Treatment Systems Consisting of Magnesium Coagulation-Precipitation, Dissolved Air Flotation, Recarbonation, and Filtration | |
| CN106430846A (en) | Efficient treatment integrated process for recalcitrant wastewater with low organic matter content | |
| CN106430870B (en) | A system and method for strengthening resource utilization of excess sludge | |
| KR102277551B1 (en) | Processing Method of Non-biodegradable Organic Wastewater Based on Improved Oxidation Treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190531 |