CN100400441C - Process for combined water treatment of chemical oxidizing-biological biological filtering tank - Google Patents
Process for combined water treatment of chemical oxidizing-biological biological filtering tank Download PDFInfo
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- CN100400441C CN100400441C CNB2005100351329A CN200510035132A CN100400441C CN 100400441 C CN100400441 C CN 100400441C CN B2005100351329 A CNB2005100351329 A CN B2005100351329A CN 200510035132 A CN200510035132 A CN 200510035132A CN 100400441 C CN100400441 C CN 100400441C
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000126 substance Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001914 filtration Methods 0.000 title claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 30
- 230000003647 oxidation Effects 0.000 claims abstract description 25
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012028 Fenton's reagent Substances 0.000 claims abstract description 21
- 230000033228 biological regulation Effects 0.000 claims abstract description 17
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- 238000002203 pretreatment Methods 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 abstract description 26
- 230000002829 reductive effect Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 abstract 4
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 244000005700 microbiome Species 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention relates to the water treatment field and particularly relates to the field of utilizing the coordinate process of chemical oxidation and an aeration biological filter tank to treat polluted source water and waste water, especially waste water containing organics which are difficult to degrade biologically. The present invention comprises chemical oxidation treatment, regulation tank treatment, settling tank treatment and aeration biological filter tank treatment when using a fenton reagent as a chemical oxidizing agent. The present invention comprises chemical oxidation treatment, middle regulation tank treatment and aeration biological filter tank treatment when using ozone as the chemical oxidizing agent. The method raises the treatability of the aeration biological filter tank. Thus, in the condition of high-grade effluent water quality, the present invention also has the advantages that the treatment technological process is short, the capital cost and the running cost are saved, the operation and the management are easy, treatment facilities can be started to run intermittently, expanding the rebuilding and the extension of the production scale is convenient, influences generated on the surrounding environment by odor and noise are reduced, etc.
Description
Technical field
The present invention relates to water treatment field, specifically is to utilize the chemical oxidizing-biological biological filtering tank process integration to handle the field of wastewater that the water at contaminated water source, waste water particularly contain refractory organic.
Background technology
Chemical oxidation is widely used in the refractory organic of removing in the water as the wastewater oxidation technology, and biodegradable property of wastewater can be improved.The used chemical oxidizing agent of this method has: Fenton reagent (redox system that hydrogen peroxide and ferrous ion are formed), ozone, clorox, potassium permanganate etc.But use this method separately, often added amount of chemical is big, and required expense is too high, and is less economical.
BAF (BAF) technology is mainly used in the sewage disposal of lower concentration, handles low-concentration industrial sewage disposal, advanced treatment of wastewater etc. as city domestic sewage.This technology is born in the end of the eighties in last century, in the existing application of developed countries such as Europe, North America and Japan.It is an a kind of microorganism contact growing system, by attached to the absorption of the microorganism on the filler, degraded, oxidation, effect such as synthetic, removes dissolved matter biodegradable and utilization.The characteristics of this method Ji Wushuichulibaoqichi and feedwater rapid filter are in one, the use of the particulate filler of high-specific surface area has not only increased microbial biomass, and microbic activity height, make waste water to contact fully effectively simultaneously, thereby make the general traditional biologic treating technique of BAF that higher processing efficiency be arranged with the microorganism of filling surface.The maximum characteristics of BAF are to integrate bio-oxidation and hold back suspended solids, have saved follow-up secondary sedimentation basins, and treatment process is simplified.In addition, biological aerated filter process organism volumetric loading height, hydraulic load are big, ask during hydraulic retention short, required initial cost is few, energy consumption and running cost are low and guarantee the characteristics of higher effluent quality.But the BAF technology is regularly carried out back flushing to clean the suspended solid of holding back in the filter tank (SS) and to upgrade microbial film on the filler to need, thereby the former water SS that requires to enter BAF can not be too high, in order to avoid make back flushing frequently influence the normal operation of technology.
Summary of the invention
Purpose of the present invention is exactly in order to solve above-mentioned the deficiencies in the prior art part, not high at having the organic contamination substrate concentration, be chemical oxygen demand (COD) (COD, Chemical Oxygen Demand) is lower than 500mg/L, but the waste water of the characteristics of these organism difficult for biological degradation, propose to adopt chemical oxidation, the oxidized portion organism, main is the biodegradability (content of the reductive organic matter that available biological method degraded is removed) that has improved organic pollutant, and then handles with the combined treatment process of BAF.
Another object of the present invention is to water supply purification to contaminated source water.Provide a kind of economy and effective treatment craft, solve along with source water by the problem that the possibility of difficult for biological degradation Organic pollutants increases, satisfy the raising of people to the tap water specification of quality, remove the organic requirement in the tap water.
The object of the invention is achieved through the following technical solutions:
A kind of method of chemical oxidizing-biological biological filtering tank associating water treatment, handling four steps by chemical oxidation treatment, equalizing tank processing, settling tank processing and BAF forms, the chemical oxidizing agent of described chemical oxidation treatment step is a Fenton reagent, the mass ratio of ferrous ion and hydrogen peroxide is 0.5～2.0: 1 in the described Fenton reagent, the add-on of described Fenton reagent be in the Fenton reagent in hydrogen peroxide and the pending water COD mass ratio be 0.1～2: 1, the reaction times is 1～2 hour; After the reaction, handle at equalizing tank with alkaline matter through the pretreated water of Fenton reagent, be adjusted to pH value 6～8, after the Fenton reagent pre-treatment, the pH of treatment solution descends, need in equalizing tank, add alkaline matter, pH regulator to neutral (pH value about 7), is helped the requirement of microbiological treatment in the BAF.The water that equalizing tank is handled is again through settling tank precipitate and separate flco, 1～2 hour residence time in settling tank of water, because residual after the Fenton reagent pre-treatment more throw out arranged, need remove by settling tank before biochemical treatment.The water of handling through settling tank enters BAF then, and the time of handling in BAF is 2～6 hours.Described alkaline matter is sodium hydroxide, potassium hydroxide, lime or yellow soda ash.
The present invention also provides the method for another kind of chemical oxidizing-biological biological filtering tank associating water treatment, handling three steps by chemical oxidation treatment, the processing of intermediate regulations pond and BAF forms, the chemical oxidizing agent of described chemical oxidation treatment step is an ozone, the add-on of ozone is that the mass ratio of COD in ozone and the pending water is 0.01～2: 1, and the reaction times is 10～30 minutes; After the reaction, water after the ozone pre-treatment enters the intermediate regulations pond, the residence time of water in the intermediate regulations pond is 20～60 minutes, and the purpose of 20 to 60 minutes intermediate regulations tank waterpower residence time is to make through residual ozone after the ozone oxidation pre-treatment to decompose; The water of handling through the intermediate regulations pond enters BAF then, is 2～6 hours in the BAF treatment time.
Principle of the present invention: the waste water that will contain refractory organic carries out the chemical oxidation pre-treatment with Fenton reagent or ozone earlier, to being used for the pretreated chemical agent of chemical oxidation, remove and require after its chemical oxidation pre-treatment, the organism of most of difficult for biological degradation can be converted into biodegradable organism, also to require after the chemical oxidation pre-treatment, the residual pretreated oxygenant of chemical oxidation that is used on a small quantity is in the intermediate sedimentation pond or the very fast degraded of equalizing tank, thereby follow-up biochemical treatment is not had residual toxicity.
The maximum characteristics of BAF are to integrate bio-oxidation and hold back suspended solids, have saved follow-up secondary sedimentation basins, and treatment process is simplified.In addition, biological aerated filter process organism volumetric loading height, hydraulic load are big.Ask during hydraulic retention short, required initial cost is few, energy consumption and running cost are low and guarantee the characteristics of higher effluent quality.After BAF is handled, further improved the water quality of treat effluent, make its qualified discharge, or reach the reuse water standard.
The present invention compared with prior art has the following advantages and beneficial effect:
If contain the organism of difficult for biological degradation in the waste water, handle with BAF, also be helpless.Adopt the chemical oxidation pretreatment technology, destroy the organism of difficult for biological degradation, be translated into biodegradable organism, utilize BAF that it is carried out biochemical treatment again, give full play to the advantage of BAF, the waste water that contains refractory organic is effectively handled.Owing to improved the BAF handlability, advantage of the present invention is embodied as:
(1) less pool volume and floor space, the BOD of BAF
5Volumetric loading can reach 5～6kgBOD
5/ (m
3D), be conventional activated sludge method or contact oxidation method 6～12 times.
(2) high-quality effluent quality.At BOD
5Volumetric loading is 6kgBOD
5/ (m3d) time, its water outlet SS and BOD
5Can remain on below the 10mg/L, COD can remain on below the 50mg/L.
(3) processing technological flow is short.Because the physics crown_interception of BAF, so second pond and sludge reflux pump room need be set, treatment scheme is simplified, and floor space is further reduced.
(4) capital cost, economic operating cost.Because this techniqueflow weak point, pool volume and floor space are little, and capital cost is reduced greatly, simultaneously, particulate filler makes oxygen-transfer efficiency improve, and the oxygen supply power consumption descends, and unit sewage disposal power consumption is low, and working cost handles low about 1/5 than ordinary method.
(5) easy handling management.The BAF capacity of resisting impact load is strong, and is low temperature resistant, and the anxiety of no sludge bulking can avoid microorganism to run off, and keeps higher microbial biomass.Therefore, daily operation management is simple, and treatment effect is stable.
(6) treatment facility can intermittently start operation.Because a large amount of attached growth of microorganisms is inner and surperficial at the particulate filler of rough porous, can keep certain microorganism active, therefore, the recovery that helps system starts.
(7) easy to be filmed starts fast.BAF is when 10～15 ℃ of water temperatures, and 2～3 weeks can be finished the biofilm process.
(8) BAF adopts modular construction, and what be convenient to expand the scale of production changes, extends.
(9) closed factory building be can build up, foul smell, noise reduced and the influence of surrounding environment.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
Adopting Fenton reagent---biological aerated filter process is to the processing of the acid rose red simulated wastewater that contains difficult for biological degradation.At first, determine Fe by the pre-treatment of Fenton reagent
2+/ H
2O
2Be 0.5: 1, H
2O
2/ COD is 2: 1.Chroma removal rate is 99% under this this condition, and the COD clearance is 46.94%.1 hour preoxidation residence time of chemistry, to add NaOH through the pretreated simulated wastewater of Fenton reagent then, to regulate its pH value be 6.8～7.5, enter settling tank (needn't be accurate to 6.8 or 7.5), in settling tank, remove the suspended substance in the waste water, 1.5 hours residence time in settling tank of waste water, through the supernatant liquor of precipitation process, carry out follow-up biochemical treatment by BAF.In the BAF residence time is 3 hours.Through the COD clearance of the pretreated waste water of this condition after BAF is handled is 84.6%, the average COD 250mg/L of former water inlet, and colourity reaches 2000 times, and handling back colourity is 20 times, and the COD value is 20.4mg/L.
Embodiment 2
Ozone---biological aerated filter process is handled the acid rose red simulated wastewater that contains difficult for biological degradation in employing.At first remove colourity by the ozone pre-treatment, the ozone dosage is that ozone and COD mass ratio are 2: 1, the ozonize time is 30 minutes, chroma removal rate is 98%, the COD clearance is 30%, though the simulated wastewater COD clearance later through the ozone pre-treatment is not high, biodegradability is well improved.Water outlet after the ozonize enters the intermediate regulations pond, 50 minutes residence time in the intermediate regulations pond of waste water, and then enter follow-up BAF.Though BAF does not have removal effect substantially to colourity, COD but had good removal effect.In the BAF residence time is 6 hours, and the COD clearance reaches 84.9%.The average 250mg/L of the COD of former water inlet, colourity reaches 2000 times, and handling back colourity is 20 degree, and the COD value is 26.4mg/L.
Embodiment 3
The mean value that one chemical plant wastewater, the water outlet after secondary biochemical treatment contain the COD value is 120mg/L, a little more than wastewater discharge standard at that time.This waste water has passed through biochemical treatment, the organism in the water, and major part is the organism that is difficult to further biochemical treatment, adopts Fenton reagent---biological aerated filter process, at first by the pre-treatment of Fenton reagent, determines Fe
2+/ H
2O
2Be 2: 1, H
2O
2/ COD is 0.2: 1.1.5 hours chemical oxidation reaction time, to regulate p H value to 7～8 through the pretreated water hydro-oxidation of Fenton reagent potassium then, enter settling tank and remove suspended substance in the water, 1 hour residence time in settling tank, supernatant liquor carries out follow-up biochemical treatment by BAF.The BAF residence time is 2 hours, and the COD value of handling the back water outlet is reduced to 30mg/L from 120mg/L, reaches the standard of factory application in recirculated cooling water.
Embodiment 4
Ozone---biological aerated filter process is handled containing difficult for biological degradation fertilizer plant waste water in employing.At first by the ozone pre-treatment, the ozone dosage is 0.1 times of COD (mass ratio), and the chemical oxidation time is 20 minutes.Though the waste water COD clearance later through the ozone pre-treatment is not high, biodegradability is well improved, and after ozonize, enters the intermediate regulations pond, and the residence time of waste water in the intermediate regulations pond is 30 minutes.In the BAF residence time is 4 hours, and the COD removal effect reaches more than 90%.The COD of former water inlet surpasses 150mg/L, handles back COD value also less than 40mg/L, in the time of best, handle the COD value of back water outlet and has only 7mg/L.
Embodiment 5
The water that a certain printing and dyeing mill of the Delta of the Pearl River adopts local contaminated stream is as the process water source water, and the CODcr value in the river is 100-110mg/L, and after conventional water supply process was handled, the CODcr of water outlet still had 70～80mg/L.Make the technology water with this water, leave stain on the cloth when printing and dyeing are arranged.Adopt Fenton reagent---biological aerated filter process, at first, determine Fe by the pre-treatment of Fenton reagent
2+/ H
2O
2Be 1: 1, H
2O
2/ COD is 0.1: 1.1 hour chemical oxidation reaction time, to add yellow soda ash through the pretreated water of Fenton reagent then and regulate p H value to 6～7, enter settling tank and remove suspended substance in the water, 1.5 hours residence time in settling tank, supernatant liquor carries out follow-up biochemical treatment by BAF.The BAF residence time is 6 hours, and the COD value of handling the back water outlet is reduced to 10-15 mg/L from 100-110mg/L, with these process water printing and dyeing, the quality problems that do not have appearance to cause because of process water again.
Embodiment 6
Ozone---biological aerated filter process is handled to reach the requirement of process water the stream water of heavily contaminated in employing.At first by the ozone pre-treatment, the ozone dosage is that the mass ratio of ozone and COD is 0.01: 1, and the chemical oxidation time is 10 minutes.After ozonize, enter the intermediate regulations pond, the residence time of waste water in the intermediate regulations pond is 20 minutes.In the BAF residence time is 2 hours, and the COD removal effect reaches more than 90%.The COD 100mg/L of former water inlet handles back COD value 12-15mg/L.
Claims (3)
1. the method for chemical oxidizing-biological biological filtering tank associating water treatment, handling four steps by chemical oxidation treatment, equalizing tank processing, settling tank processing and BAF forms, it is characterized in that, the chemical oxidizing agent of described chemical oxidation treatment step is a Fenton reagent, the mass ratio of ferrous ion and hydrogen peroxide is 0.5～2.0: 1 in the described Fenton reagent, the add-on of described Fenton reagent be in the Fenton reagent in hydrogen peroxide and the pending water COD mass ratio be 0.1～2: 1, the reaction times is 1～2 hour; Handle at equalizing tank with alkaline matter through the pretreated water of Fenton reagent, be adjusted to pH value 6～8; The water that equalizing tank is handled is again through settling tank precipitate and separate flco, 1～2 hour residence time in settling tank of water; The water of handling through settling tank enters BAF then, is 2～6 hours in the BAF treatment time.
2. the method for chemical oxidizing-biological biological filtering tank associating water treatment according to claim 1 is characterized in that, described alkaline matter is sodium hydroxide, potassium hydroxide, lime or yellow soda ash.
3. the method for chemical oxidizing-biological biological filtering tank associating water treatment, handling three steps by chemical oxidation treatment, the processing of intermediate regulations pond and BAF forms, it is characterized in that, the chemical oxidizing agent of described chemical oxidation treatment step is an ozone, the add-on of ozone is that the mass ratio of COD in ozone and the pending water is 0.01～2: 1, and the reaction times is 10～30 minutes; After the reaction, the water after the ozone pre-treatment enters the intermediate regulations pond, and the residence time of water in the intermediate regulations pond is 20～60 minutes; The water of handling through the intermediate regulations pond enters BAF then, is 2～6 hours in the BAF treatment time.
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| CNB2005100351329A CN100400441C (en) | 2005-06-14 | 2005-06-14 | Process for combined water treatment of chemical oxidizing-biological biological filtering tank |
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| CNB2005100351329A CN100400441C (en) | 2005-06-14 | 2005-06-14 | Process for combined water treatment of chemical oxidizing-biological biological filtering tank |
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| CN100400441C true CN100400441C (en) | 2008-07-09 |
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Cited By (1)
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| CN101704609B (en) * | 2009-10-31 | 2011-11-02 | 华南理工大学 | Feedwater treatment method by pre-ozonation and aerated biological activated carbon |
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| CN100494098C (en) * | 2007-03-09 | 2009-06-03 | 华南理工大学 | Fenton and air-float integral water treating method |
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| CN101186402B (en) * | 2007-11-27 | 2011-06-01 | 华泰集团有限公司 | Fenton two-stage method oxidation processing technique for paper-making and pulping waste water |
| CN101723540B (en) * | 2008-10-23 | 2012-07-25 | 中国石油化工股份有限公司 | Water treatment method through combination of catalytic oxidation and aeration biological filter |
| CN101734825B (en) * | 2008-11-20 | 2012-07-25 | 中国石油化工股份有限公司 | Method for treating wastewater generated by cyclohexanone ammoximation process |
| CN102040308B (en) * | 2009-10-22 | 2012-08-01 | 中国石油化工股份有限公司 | Method for treating wastewater by combining catalytic oxidation with biological aerated filter |
| CN101798159A (en) * | 2010-03-26 | 2010-08-11 | 广东溢达纺织有限公司 | Textile printing and dyeing wastewater treatment device and technology |
| CN101863589B (en) * | 2010-06-09 | 2012-04-18 | 中国海洋石油总公司 | Method for advanced treatment of wastewater by using combination of catalytic ozonation and internal circulation biological filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704609B (en) * | 2009-10-31 | 2011-11-02 | 华南理工大学 | Feedwater treatment method by pre-ozonation and aerated biological activated carbon |
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| CN1724420A (en) | 2006-01-25 |
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