CN105565610A - Industrial wastewater deep treatment process - Google Patents
Industrial wastewater deep treatment process Download PDFInfo
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- CN105565610A CN105565610A CN201610102552.2A CN201610102552A CN105565610A CN 105565610 A CN105565610 A CN 105565610A CN 201610102552 A CN201610102552 A CN 201610102552A CN 105565610 A CN105565610 A CN 105565610A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides an industrial wastewater deep treatment process. The process includes the following steps of firstly, making industrial wastewater enter an adjusting pool through a fine rack; secondly, conducting coagulation air floatation separation treatment on wastewater; thirdly, conducting catalytic oxidation on wastewater in an electrolytic tank; fourthly, conducting biochemical treatment in an A2/O biochemical system; fifthly, making a product enter a coagulating basin to be subjected to coagulation; sixthly, conducting depositing in a depositing tank; seventhly, conducting film filtering. Before biochemical treatment is conducted on wastewater, electrolytic catalytic oxidation is conducted in the electrolytic tank, organic substances difficult to degrade can be converted into organic substances capable of being biologically degraded, and part of heavy metal can be removed; biochemical treatment is conducted after electrolysis, and COD in wastewater can be removed more thoroughly; the coagulation step is conducted after biochemical treatment, and the put-in amount of coagulating agent is greatly decreased. Filtering is conducted through an ultrafltration film after coagulation treatment, and filtered water is purer and can reach the water quality standard of reuse water.
Description
Technical field
The invention belongs to water-treatment technology field, be specially a kind of industrial sewage advanced treatment process.
Background technology
According to the first time whole nation Pollutant source investigation to complete for 2010, China's industrial sewage year generation 738.33 hundred million tons, quantity discharged 236.73 hundred million tons, sewage year treatment capacity 458.52 hundred million tons.Principal pollutant generation in industrial sewage: chemical oxygen demand (COD) 3145.35 ten thousand tons, ammonia nitrogen 201.67 ten thousand tons, petroleum-type 54.15 ten thousand tons, volatile phenol 12.38 ten thousand tons, 2.43 ten thousand tons, heavy metal.China's water resources shortage, industrial sewage advanced treatment and reclamation becomes the selection in numerous area as a feasible program of saving water resource.Due to complicacy and the bio-refractory of industrial sewage component, the efficient industrial sewage further treatment technique can selected now is little.Comparison of ingredients in industrial sewage is complicated, except containing various organic contamination beyond the region of objective existence, also containing various inorganics, as metal ion and acid ion, common are Ca
2+, Mg
2+, Na
+, K
+, Cl
-, SO
4 2-deng.Find in test practice, in catalytic and oxidative electrolysis technology reaction process, Ca
2+calcium carbonate scale can be formed at catalyst surface, the active centre of catalyzer be covered, affects the activity of catalyzer, cause the decrease in efficiency of oxidative degradation organic pollutant, affect effluent quality.
Summary of the invention
For solving the problem, the invention discloses a kind of industrial sewage advanced treatment process.
In order to reach above object, the invention provides following technical scheme:
A kind of industrial sewage advanced treatment process, comprises the following steps:
(1) industrial sewage enters in equalizing tank by fine fack, carries out the adjustment homogenizing of the water yield, water quality, and arranges fluid level controller and lift pump in equalizing tank, after liquid level controller transmission of signal, deliver to coagulation floatation by lift pump;
(2) be provided with coagulation air-float device in coagulation floatation, after coagulation air-float separating treatment is carried out to sewage, enter in biological contact oxidation pond; In dissolved air flotation process, remove density in sewage and the close molecule of water;
(3) coagulation floatation water outlet is regulated PH to 2 ~ 4, send into electrolyzer, in electrolyzer, be provided with Fe-C micro electrolysis filler, under the katalysis of DC electric field and Fe-C micro electrolysis filler, in oxygenolysis sewage, be difficult to biodegradable organism;
(4) sewage flowed out from electrolyzer flows into A
2/ O biochemical system, A
2/ O biochemical system is made up of anaerobic pond, anoxic pond and multi-stage biological contact-oxidation pool successively, and multi-stage biological contact-oxidation pool is provided with water return pipeline and is connected with anoxic pond; The phosphorus containing sludge that second pond refluxes by anaerobic pond carries out Phosphurus release, containing denitrifier in anoxic pond, nitrate-nitrogen reduction is gaseous nitrogen by denitrifier, multi-stage biological contact-oxidation pool adopts contact oxidation method to carry out removal COD, removal BOD, nitrated and absorption phosphorus reaction to sewage, a sewage part through the process of multi-stage biological contact-oxidation pool is back to anoxic pond, reflux ratio is 200% ~ 300%, and another part flows into coagulation basin;
(5) pH value adding alkali regulating step (4) water outlet is 7 ~ 8, water outlet after alkali regulates is introduced into coagulation basin coagulation, add coagulating agent at the coagulation basin of rapid stirring, the organic contamination suspended particle in sewage and colloid are changed into macroscopic macrobead suspended substance; Described coagulating agent consists of the following composition: poly-ferric chloride, ferrous sulfate, wilkinite, sodium alginate, polyacrylamide;
(6) sewage after step (5) being processed flows in settling tank and precipitates, and makes solid-liquid separation;
(7) membrane filtration: the supernatant liquor part flowed out from settling tank is directly discharged, and a part is delivered to membrane sepn pond and directly used or discharge after membrane filtration process, and the concentrate recirculation after membrane filtration is to A
2/ O biochemical system.
As preferably, in step (3), electrolyzer adopts stainless steel to make pole plate, the often pair of interelectrode distance 3 ~ 6 centimetres, and often pair of electrode applies 5 ~ 7V volts DS, and carry out aeration in electrolyzer, controlling its dissolved oxygen is 2 ~ 3mg/L, and sewage hydraulic detention time is 0.5 ~ 2h; Described Fe-C micro electrolysis filler is made up of iron filings, Powdered Activated Carbon and rare earth metal powder, and the weight ratio of iron filings and Powdered Activated Carbon is 4.7 ~ 4.8:1, and the add-on of rare earth metal powder is 0.05 ~ 0.09% of iron filings and Powdered Activated Carbon gross weight; Fe-C micro electrolysis filler dosage is put by 10 ~ 15/lifting.
As preferably, in step (7), what described membrane filtration adopted is hyperfiltration membrane assembly, and membrane flux when described ultra-filtration membrane is immerseable is 20 ~ 25L/m
2h, membrane flux when described ultra-filtration membrane is separate type is 70 ~ 80L/(m
2h); The aeration rate in described membrane sepn pond is 2 ~ 4m
3/ (m
2h).
As preferably, described coagulating agent consists of the following composition: poly-ferric chloride, ferrous sulfate, wilkinite, sodium alginate, polyacrylamide.
As preferably, in described coagulating agent, the mass fraction of each component is as follows: in step (5), poly-ferric chloride 2 ~ 4 parts, 1 ~ 2 part, ferrous sulfate, wilkinite 3 ~ 5 parts, sodium alginate 2 ~ 3 parts, polyacrylamide 3 ~ 4 parts.
The beneficial effect that the present invention obtains is:
In the present invention, sewage is before biochemical treatment, first carry out catalytic and oxidative electrolysis technology in a cell, the organism being difficult to degrade can be changed into can biodegradable organism, part heavy metal can be removed simultaneously, biochemical treatment is carried out again after electrolysis, the COD in sewage can be made to remove more thorough, coagulation is carried out again further except the heavy metal ion in anhydrating and the organism that is not degraded through the sewage of biochemical treatment, after coagulation step is placed on biochemical treatment, greatly reduce the dosage of coagulating agent.Water quality after coagulating treatment reaches emission standard, and a part is directly discharged, and another part is again through ultrafiltration membrance filter, and the water after filtration is purer, can reuse.
Embodiment
Below in conjunction with embodiment, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
A kind of industrial sewage advanced treatment process, comprises the following steps:
(1) industrial sewage enters in equalizing tank by fine fack, carries out the adjustment homogenizing of the water yield, water quality, and arranges fluid level controller and lift pump in equalizing tank, after liquid level controller transmission of signal, deliver to coagulation floatation by lift pump;
(2) be provided with coagulation air-float device in coagulation floatation, after coagulation air-float separating treatment is carried out to sewage, enter in biological contact oxidation pond; In dissolved air flotation process, remove density in sewage and the close molecule of water;
(3) coagulation floatation water outlet is regulated PH to 2 ~ 4, send into electrolyzer, in electrolyzer, be provided with Fe-C micro electrolysis filler, under the katalysis of DC electric field and Fe-C micro electrolysis filler, in oxygenolysis sewage, be difficult to biodegradable organism; Electrolyzer adopts stainless steel to make pole plate, the often pair of interelectrode distance 3 ~ 6 centimetres, and often pair of electrode applies 5 ~ 7V volts DS, and carry out aeration in electrolyzer, controlling its dissolved oxygen is 2 ~ 3mg/L, and sewage hydraulic detention time is 0.5 ~ 2h; Described Fe-C micro electrolysis filler is made up of iron filings, Powdered Activated Carbon and rare earth metal powder, and the weight ratio of iron filings and Powdered Activated Carbon is 4.7 ~ 4.8:1, and the add-on of rare earth metal powder is 0.05 ~ 0.09% of iron filings and Powdered Activated Carbon gross weight; Fe-C micro electrolysis filler dosage is put by 10 ~ 15/lifting;
(4) sewage flowed out from electrolyzer flows into A
2/ O biochemical system, A
2/ O biochemical system is made up of anaerobic pond, anoxic pond and multi-stage biological contact-oxidation pool successively, and multi-stage biological contact-oxidation pool is provided with water return pipeline and is connected with anoxic pond; The phosphorus containing sludge that second pond refluxes by anaerobic pond carries out Phosphurus release, containing denitrifier in anoxic pond, nitrate-nitrogen reduction is gaseous nitrogen by denitrifier, multi-stage biological contact-oxidation pool adopts contact oxidation method to carry out removal COD, removal BOD, nitrated and absorption phosphorus reaction to sewage, a sewage part through the process of multi-stage biological contact-oxidation pool is back to anoxic pond, reflux ratio is 200% ~ 300%, and another part flows into coagulation basin;
(5) pH value adding alkali regulating step (4) water outlet is 7 ~ 8, water outlet after alkali regulates is introduced into coagulation basin coagulation, add coagulating agent at the coagulation basin of rapid stirring, the organic contamination suspended particle in sewage and colloid are changed into macroscopic macrobead suspended substance; Described coagulating agent consists of the following composition: poly-ferric chloride 2 ~ 4 parts (mass fraction), 1 ~ 2 part, ferrous sulfate, wilkinite 3 ~ 5 parts, sodium alginate 2 ~ 3 parts, polyacrylamide 3 ~ 4 parts;
(6) sewage after step (5) being processed flows in settling tank and precipitates, and makes solid-liquid separation;
(7) membrane filtration: the supernatant liquor part flowed out from settling tank is directly discharged, and a part is delivered to membrane sepn pond and directly used or discharge after membrane filtration process, and the concentrate recirculation after membrane filtration is to A
2/ O biochemical system.Membrane flux when described ultra-filtration membrane is immerseable is 20 ~ 25L/m
2h, membrane flux when described ultra-filtration membrane is separate type is 70 ~ 80L/(m
2h); The aeration rate in described membrane sepn pond is 2 ~ 4m
3/ (m
2h).
Technique means disclosed in the present invention program is not limited only to the technique means disclosed in above-mentioned embodiment, also comprises the technical scheme be made up of above technical characteristic arbitrary combination.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (4)
1. an industrial sewage advanced treatment process, comprises the following steps:
(1) industrial sewage enters in equalizing tank by fine fack, carries out the adjustment homogenizing of the water yield, water quality, and arranges fluid level controller and lift pump in equalizing tank, after liquid level controller transmission of signal, deliver to coagulation floatation by lift pump;
(2) be provided with coagulation air-float device in coagulation floatation, after coagulation air-float separating treatment is carried out to sewage, enter in biological contact oxidation pond; In dissolved air flotation process, remove density in sewage and the close molecule of water;
(3) coagulation floatation water outlet is regulated PH to 2 ~ 4, send into electrolyzer, in electrolyzer, be provided with Fe-C micro electrolysis filler, under the katalysis of DC electric field and Fe-C micro electrolysis filler, in oxygenolysis sewage, be difficult to biodegradable organism;
(4) sewage flowed out from electrolyzer flows into A
2/ O biochemical system, A
2/ O biochemical system is made up of anaerobic pond, anoxic pond and multi-stage biological contact-oxidation pool successively, and multi-stage biological contact-oxidation pool is provided with water return pipeline and is connected with anoxic pond; The phosphorus containing sludge that second pond refluxes by anaerobic pond carries out Phosphurus release, containing denitrifier in anoxic pond, nitrate-nitrogen reduction is gaseous nitrogen by denitrifier, multi-stage biological contact-oxidation pool adopts contact oxidation method to carry out removal COD, removal BOD, nitrated and absorption phosphorus reaction to sewage, a sewage part through the process of multi-stage biological contact-oxidation pool is back to anoxic pond, reflux ratio is 200% ~ 300%, and another part flows into coagulation basin;
(5) pH value adding alkali regulating step (4) water outlet is 7 ~ 8, water outlet after alkali regulates is introduced into coagulation basin coagulation, add coagulating agent at the coagulation basin of rapid stirring, the organic contamination suspended particle in sewage and colloid are changed into macroscopic macrobead suspended substance; Described coagulating agent consists of the following composition: poly-ferric chloride, ferrous sulfate, wilkinite, sodium alginate, polyacrylamide;
(6) sewage after step (5) being processed flows in settling tank and precipitates, and makes solid-liquid separation;
(7) membrane filtration: the supernatant liquor part flowed out from settling tank is directly discharged, and a part is delivered to membrane sepn pond and directly used or discharge after membrane filtration process, and the concentrate recirculation after membrane filtration is to A
2/ O biochemical system.
2. industrial sewage comprehensive processing technique as claimed in claim 1, it is characterized in that, in step (3), electrolyzer adopts stainless steel to make pole plate, the often pair of interelectrode distance 3 ~ 6 centimetres, often pair of electrode applies 5 ~ 7V volts DS, carries out aeration in electrolyzer, controlling its dissolved oxygen is 2 ~ 3mg/L, and sewage hydraulic detention time is 0.5 ~ 2h; Described Fe-C micro electrolysis filler is made up of iron filings, Powdered Activated Carbon and rare earth metal powder, and the weight ratio of iron filings and Powdered Activated Carbon is 4.7 ~ 4.8:1, and the add-on of rare earth metal powder is 0.05 ~ 0.09% of iron filings and Powdered Activated Carbon gross weight; Fe-C micro electrolysis filler dosage is put by 10 ~ 15/lifting.
3. industrial sewage comprehensive processing technique as claimed in claim 1, is characterized in that, in step (7), what described membrane filtration adopted is hyperfiltration membrane assembly, and membrane flux when described ultra-filtration membrane is immerseable is 20 ~ 25L/m
2h, membrane flux when described ultra-filtration membrane is separate type is 70 ~ 80L/(m
2h); The aeration rate in described membrane sepn pond is 2 ~ 4m
3/ (m
2h).
4. industrial sewage comprehensive processing technique as claimed in claim 1, it is characterized in that, in step (5), in described coagulating agent, the mass fraction of each component is as follows: poly-ferric chloride 2 ~ 4 parts, 1 ~ 2 part, ferrous sulfate, wilkinite 3 ~ 5 parts, sodium alginate 2 ~ 3 parts, polyacrylamide 3 ~ 4 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102552.2A CN105565610A (en) | 2016-02-25 | 2016-02-25 | Industrial wastewater deep treatment process |
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|---|---|---|---|
| CN201610102552.2A CN105565610A (en) | 2016-02-25 | 2016-02-25 | Industrial wastewater deep treatment process |
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Family
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434332A (en) * | 2017-07-03 | 2017-12-05 | 安徽国能亿盛环保科技有限公司 | A kind of technique for treating industrial wastewater |
| CN108928981A (en) * | 2018-07-11 | 2018-12-04 | 黄锦山 | A kind of environment-friendly treating process of industrial wastewater |
| CN109052873A (en) * | 2018-10-19 | 2018-12-21 | 哈尔滨工业大学 | A kind of group technology handling high organic concentration town sewage |
| CN112777784A (en) * | 2020-12-17 | 2021-05-11 | 大长江环境工程技术有限责任公司 | Heavy metal industrial sewage treatment basic process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665311A (en) * | 2009-09-24 | 2010-03-10 | 中南大学 | Catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater |
| CN203440207U (en) * | 2013-08-28 | 2014-02-19 | 青岛易邦生物工程有限公司 | Automatic dosing device of sewage treatment system |
| CN104743736A (en) * | 2014-08-12 | 2015-07-01 | 安徽一隆羽绒有限公司 | Down feather washing wastewater treatment system |
| CN105293815A (en) * | 2014-07-23 | 2016-02-03 | 金乡县大蒜研究所 | Method for treating high-concentration sewage produced from garlic processing |
-
2016
- 2016-02-25 CN CN201610102552.2A patent/CN105565610A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665311A (en) * | 2009-09-24 | 2010-03-10 | 中南大学 | Catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater |
| CN203440207U (en) * | 2013-08-28 | 2014-02-19 | 青岛易邦生物工程有限公司 | Automatic dosing device of sewage treatment system |
| CN105293815A (en) * | 2014-07-23 | 2016-02-03 | 金乡县大蒜研究所 | Method for treating high-concentration sewage produced from garlic processing |
| CN104743736A (en) * | 2014-08-12 | 2015-07-01 | 安徽一隆羽绒有限公司 | Down feather washing wastewater treatment system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434332A (en) * | 2017-07-03 | 2017-12-05 | 安徽国能亿盛环保科技有限公司 | A kind of technique for treating industrial wastewater |
| CN108928981A (en) * | 2018-07-11 | 2018-12-04 | 黄锦山 | A kind of environment-friendly treating process of industrial wastewater |
| CN108928981B (en) * | 2018-07-11 | 2021-04-13 | 侯小芳 | Environment-friendly treatment process for industrial wastewater |
| CN109052873A (en) * | 2018-10-19 | 2018-12-21 | 哈尔滨工业大学 | A kind of group technology handling high organic concentration town sewage |
| CN112777784A (en) * | 2020-12-17 | 2021-05-11 | 大长江环境工程技术有限责任公司 | Heavy metal industrial sewage treatment basic process |
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Application publication date: 20160511 |