CN103663789A - Acid and alkali wastewater treatment method - Google Patents
Acid and alkali wastewater treatment method Download PDFInfo
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- CN103663789A CN103663789A CN201310671637.9A CN201310671637A CN103663789A CN 103663789 A CN103663789 A CN 103663789A CN 201310671637 A CN201310671637 A CN 201310671637A CN 103663789 A CN103663789 A CN 103663789A
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- soda acid
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Abstract
The invention discloses an acid and alkali wastewater treatment method. According to the method, wastewater treatment agents are used in a high-activity environment, so that the treatment efficiency is high; macromolecular impurities in sewage can be further filtered by a nanofiltration membrane, and acid and alkali ions and water can be recycled. The acid and alkali wastewater treatment method can be used for pretreatment and advanced treatment of petrochemical wastewater, papermaking, pharmacy, partial fine chemical engineering and the like.
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of soda acid sewage water treatment method.
Background technology
Industrial sewage, for sanitary sewage, has more hazardness, and the industrial sewage processing scheme of therefore finding high efficiency, low cost is extremely urgent.And industrial sewage is because containing different factors, so the aobvious acidity having, the aobvious alkalescence having, current sewage disposal all has certain limitation, can not be widely used.China's discharged volume of industrial waste water is large, and some places gross contamination emission is considerably beyond local environmental capacity, and this is the serious major reasons of some local water environment pollutions.How to cut down significantly pollutant discharge amount, and accomplish recirculation utilization, significant to water shortage zone.
Summary of the invention
Object of the present invention is exactly to provide a kind of soda acid sewage water treatment method for the defect of above-mentioned existence.Sewage-treating agent in the method is all used under the higher environment of itself activity, so processing efficiency is high, and the use of nanofiltration membrane can be further by the macromole contaminant filter in sewage out, and acid ion alkali ion and water can be recycled.The pre-treatment and the advanced treatment that can be used for petrochemical wastewater, papermaking, pharmacy, part fine chemistry industry etc.
A kind of soda acid sewage water treatment method technical scheme of the present invention, concrete steps are:
(1), by adding pH adjusting agent, regulate the pH value of sewage to required scope;
(2) add the sewage-treating agent that is suitable for pH value scope;
(3) supernatant liquor after precipitation enters next step processing;
(4) supernatant liquor is passed through to nanofiltration membrane component again, macromole impurity is filtered out, and acid ion alkali ion and water are recycled.
In step (1), in sewage, add pH adjusting agent to regulate pH value to add FeSO to 5.5-6.0
47H
2o, then add acidic oxidation agent to regulate pH value to 3.0-6.0, control redox potential is 180-220mv, stirring reaction 10-20min makes medicament and fully contacts and react, and obtains mixed solution, then adds pH adjusting agent to regulate the pH value of mixed solution to 8.0-9.0.
PH adjusting agent is at least one in hydrochloric acid, sulfuric acid, sodium hydroxide, sodium carbonate, calcium oxide.
In step (1), acidic oxidation agent is mixing solutions or the nitric acid of hydrochloric acid and hydrogen peroxide.
Step (2) is specially and adds polymerize aluminum chloride and polyacrylamide again, mixes.
In step (1), every processing 1L sewage, adds 1-2mg polyacrylamide and 1-2mg polymerize aluminum chloride in step (2).
Step (3) is that step (2) gained mixed solution is stirred to 3-5min, makes coagulating abundant, staticly settles.
Mixed solution stirring velocity is 100-300r/min.
Described nanofiltration membrane is made by polyamide material.
Beneficial effect of the present invention is: a kind of soda acid sewage water treatment method of the present invention, sewage-treating agent is all used under the higher environment of itself activity, so processing efficiency is high.And carry out step-by-step processing for sewage, the different objectionable impuritiess in can step-by-step processing sewage, reach advanced treatment.Can be used for useless pre-treatment and the advanced treatment such as petrochemical industry, papermaking, pharmacy, part fine chemistry industry, applied range, the use of nanofiltration membrane can be further by the macromole contaminant filter in sewage out, and acid ion alkali ion and water can be recycled.In sewage, the clearance of organism, inorganics can reach more than 95%, reaches as high as more than 99%.
Embodiment:
In order to understand better the present invention, with specific examples, describe technical scheme of the present invention in detail below, but the present invention is not limited thereto.
Embodiment 1
A kind of soda acid sewage water treatment method of the present invention, concrete steps are:
(1) in sewage, add pH adjusting agent to regulate pH value to add FeSO to 5.5-6.0
47H
2o, then add acidic oxidation agent to regulate pH value to 3.0-6.0, control redox potential is 180-220mv, stirring reaction 10-20min makes medicament and fully contacts and react, and obtains mixed solution, then adds pH adjusting agent to regulate the pH value of mixed solution to 8.0-9.0.
(2) add polymerize aluminum chloride and polyacrylamide, mix;
(3) step (2) gained mixed solution 100-300r/min is stirred to 3-5min, make coagulating abundant, staticly settle, the supernatant liquor after precipitation enters next step processing;
(4) supernatant liquor is passed through to nanofiltration membrane component again, macromole impurity is filtered out, and acid ion alkali ion and water are recycled.Described nanofiltration membrane is made by polyamide material.
PH adjusting agent is at least one in hydrochloric acid, sulfuric acid, sodium hydroxide, sodium carbonate, calcium oxide.
In step (1), acidic oxidation agent is mixing solutions or the nitric acid of hydrochloric acid and hydrogen peroxide.
In step (1), every processing 1L sewage, adds 1-2mg polyacrylamide and 1-2mg polymerize aluminum chloride in step (2).
Claims (9)
1. a soda acid sewage water treatment method, is characterized in that, concrete steps are:
(1), by adding pH adjusting agent, regulate the pH value of sewage to required scope;
(2) add the sewage-treating agent that is suitable for pH value scope;
(3) supernatant liquor after precipitation enters next step processing;
(4) supernatant liquor is passed through to nanofiltration membrane component again, macromole impurity is filtered out, and acid ion alkali ion and water are recycled.
2. a kind of soda acid sewage water treatment method according to claim 1, is characterized in that, adds pH adjusting agent to regulate pH value to add FeSO to 5.5-6.0 in step (1) in sewage
47H
2o, then add acidic oxidation agent to regulate pH value to 3.0-6.0, control redox potential is 180-220mv, stirring reaction 10-20min makes medicament and fully contacts and react, and obtains mixed solution, then adds pH adjusting agent to regulate the pH value of mixed solution to 8.0-9.0.
3. a kind of soda acid sewage water treatment method according to claim 2, is characterized in that, pH adjusting agent is at least one in hydrochloric acid, sulfuric acid, sodium hydroxide, sodium carbonate, calcium oxide.
4. a kind of soda acid sewage water treatment method according to claim 2, is characterized in that, in step (1), acidic oxidation agent is mixing solutions or the nitric acid of hydrochloric acid and hydrogen peroxide.
5. a kind of soda acid sewage water treatment method according to claim 2, is characterized in that, step (2) is specially and adds polymerize aluminum chloride and polyacrylamide again, mixes.
6. a kind of soda acid sewage water treatment method according to claim 2, is characterized in that, in step (1), every processing 1L sewage, adds 1-2mg polyacrylamide and 1-2mg polymerize aluminum chloride in step (2).
7. a kind of soda acid sewage water treatment method according to claim 2, is characterized in that, step (3) is that step (2) gained mixed solution is stirred to 3-5min, makes coagulating abundant, staticly settles.
8. a kind of soda acid sewage water treatment method according to claim 7, is characterized in that, mixed solution stirring velocity is 100-300r/min.
9. a kind of soda acid sewage water treatment method according to claim 1, is characterized in that, described nanofiltration membrane is made by polyamide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671637.9A CN103663789A (en) | 2013-12-11 | 2013-12-11 | Acid and alkali wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671637.9A CN103663789A (en) | 2013-12-11 | 2013-12-11 | Acid and alkali wastewater treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103663789A true CN103663789A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310671637.9A Pending CN103663789A (en) | 2013-12-11 | 2013-12-11 | Acid and alkali wastewater treatment method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999021801A1 (en) * | 1997-10-29 | 1999-05-06 | Prox T.E.C. Poprad, S.R.O. | Method for water purification based on the fenton reaction |
| CN101648970A (en) * | 2009-09-24 | 2010-02-17 | 南京工业大学 | A pretreatment method for resource recovery of glyphosate mother liquid membrane technology |
| CN102502995A (en) * | 2011-11-09 | 2012-06-20 | 中蓝连海设计研究院 | Process for treating reverse osmosis concentrated discharged water |
| CN102701480A (en) * | 2012-06-04 | 2012-10-03 | 中国环境科学研究院 | Sewage treatment method |
| CN102942270A (en) * | 2012-11-29 | 2013-02-27 | 湖南湘牛环保实业有限公司 | Technology for deeply treating and recycling biochemical effluent of coking wastewater |
-
2013
- 2013-12-11 CN CN201310671637.9A patent/CN103663789A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999021801A1 (en) * | 1997-10-29 | 1999-05-06 | Prox T.E.C. Poprad, S.R.O. | Method for water purification based on the fenton reaction |
| CN101648970A (en) * | 2009-09-24 | 2010-02-17 | 南京工业大学 | A pretreatment method for resource recovery of glyphosate mother liquid membrane technology |
| CN102502995A (en) * | 2011-11-09 | 2012-06-20 | 中蓝连海设计研究院 | Process for treating reverse osmosis concentrated discharged water |
| CN102701480A (en) * | 2012-06-04 | 2012-10-03 | 中国环境科学研究院 | Sewage treatment method |
| CN102942270A (en) * | 2012-11-29 | 2013-02-27 | 湖南湘牛环保实业有限公司 | Technology for deeply treating and recycling biochemical effluent of coking wastewater |
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Application publication date: 20140326 |