CN106430692A - Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method - Google Patents
Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method Download PDFInfo
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- CN106430692A CN106430692A CN201610507966.3A CN201610507966A CN106430692A CN 106430692 A CN106430692 A CN 106430692A CN 201610507966 A CN201610507966 A CN 201610507966A CN 106430692 A CN106430692 A CN 106430692A
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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
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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
- 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
-
- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a chemical method for reducing the COD (chemical oxygen demand) of the wastewater based on the oxidation method. The method comprises the steps of (1) adding hydrogen peroxide or sodium hypochlorite in the wastewater to oxidize organic matters in the wastewater; (2) adding a neutralizing agent in the wastewater, adjusting the pH value of the wastewater to be 10-12; (3) introducing the compressed air to stir the wastewater, and further oxidizing organic matters in the wastewater; (4) adding a coagulant into the wastewater, and simultaneously measuring the COD value of the wastewater; (5) when the COD value is reduced to be below 100 mg/L, adding an oxidizing agent, and introducing the compressed air to stir and fully oxidize the organic matters; (6) finally adjusting the pH value of the wastewater to be 6-9 by using the hydrochloric acid and discharging the wastewater when the wastewater becomes clear. According to the invention, the advantages of fast adsorption settling speed, good treatment effect, low sludge yield and low running cost are realized. Therefore, the method can be widely applied to the advanced treatment of the chemithermomechanical pulping wastewater.
Description
Technical field
The present invention relates to chemical treatment technology field is and in particular to the chemical method of waste water COD drops in a kind of oxidizing process.
Background technology
COD refers under conditions of necessarily strict, the reducing substances in water in the presence of additional strong oxidizer, quilt
The quantity of consumed oxidant during oxidation Decomposition, is represented with the mg/L of oxygen.COD reflects and is subject to reducing substances in water
The degree of pollution, these materials include organic matter, nitrite, ferrous salt, sulfide etc., but in general water and waste water inorganic also
The quantity of immunogenic substance is relatively little, and is very universal by Organic Pollution, and therefore, COD can contain relatively as organic substance
One composite target of amount.
Reducing rules waste water is using the waste water producing during chemical-mechanical pulping, has high suspended matter, high COD concentration
And the features such as high-temperature.Waste component is complicated, containing organic pollutions such as substantial amounts of hot water extract and alkali extractives, wherein main
Want the water-soluble or alkali soluble product that composition is lignin, hemicellulose class and cellulose family.To classify from functional group's angle, to contain
Phenols, alcohols, monocyclic and polycyclc aromatic compound etc..Typical processing method is processed for anaerobic and aerobic at present, and biochemistry goes out
Water COD is 200mg/L～300mg/L, follow-up increases the discharge that three-level materializing strategy can meet original GB3544-2001
Standard, but the GB3544-2008 standard that difficult to reach came into effect from 2011.This is to contain one due in reducing rules waste water
The organic matter of quantitative difficult for biological degradation, is difficult to remove it using traditional activated sludge process.Domestic at present to reducing rules waste water
Process great majority using conventional anaerobic and aerobic handling process, the water outlet COD difficult to reach industry row after processing through this method
Put standard, thus have impact on the sound development of reducing rules industry.The advanced treating of therefore reducing rules waste water has positive reality
Meaning.
Content of the invention
In sum, in order to overcome the deficiencies in the prior art, the technical problem to be solved is to provide
The technical scheme that the present invention solves above-mentioned technical problem is as follows：The chemical method of waste water COD, bag drop in a kind of oxidizing process
Include following steps：
(1) people's hydrogen peroxide or sodium hypochlorite are added in waste water oxidation operation in waste water；
(2) nertralizer, regulation pH value to 10～12 are added in waste water；
(3) lead to compressed air to be stirred, promote organic matter to aoxidize further；
(4) put into flocculating agent in waste water, measure COD value simultaneously；
(5) add oxidant when COD value is down to below lOOmg/L, and logical compressed air stirring makes the abundant oxygen of organic matter
Change；
(6) finally with hydrochloric acid, solution ph is adjusted to 6～9, can discharge after waste water clarification.
The invention has the beneficial effects as follows：Adsorption and sedimentation speed is fast, high treating effect, and sludge output is few, and operating cost is low, can be wide
General it is applied to reducing rules Sewage advanced treatment.To reducing rules waste water quality, there is stronger adaptability, different material is produced
Reducing rules wastewater treatment can obtain preferable effect.When bio-chemical effluent COD is less than 280mg/l, using product of the present invention
Process can reach discharging standards.
On the basis of technique scheme, the present invention can also do improvement further below：
Further, the nertralizer in step (2) is caustic soda or milk of lime.
Further, the flocculating agent in step (4) is alum or polyacrylamide.
Further, the oxidant position ammonium persulfate in step (5), its injected volume is 1.2kg/m3.
Specific embodiment
Below in conjunction with instantiation, the principle of the present invention and feature are described, example is served only for explaining this
Bright, it is not intended to limit the scope of the present invention.
A kind of oxidizing process drops the chemical method of waste water COD it is characterised in that comprising the steps：
(1) add people's hydrogen peroxide or sodium hypochlorite in waste water oxidation operation in waste water, such as contain Fe in waste water2+Also can
It is oxidized to Fe3+.
(2) add the nertralizers such as caustic soda, milk of lime in waste water, adjust pH value to 10～12, in alkalescence,
(3) lead to people's compressed air to be stirred, promote organic matter to aoxidize further, Fe2+It is fully oxidized to Fe3+, and raw
Become Fe (OH)3Precipitation.
(4) put into alum in waste water, the flocculating agent such as polyacrylamide makes Fe (OH)3、Cu(OH)2And suspension all wads a quilt with cotton
Retrogradation is dropped, and measures COD value (now COD value should be down to below 300mg/L) simultaneously.
(5) it is so that organic matter is aoxidized further, COD value is down to below lOOmg/L, adds oxidant ammonium persulfate, throw in
Measure as 1.2kg/m3, and logical people's compressed air stirring makes organic matter fully oxidized.
(6) finally with hydrochloric acid, solution ph is adjusted to 6～9, can discharge after waste water clarification.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of oxidizing process drops the chemical method of waste water COD it is characterised in that comprising the steps：
（1）Add people's hydrogen peroxide or sodium hypochlorite oxidation operation in waste water in waste water；（2）Add nertralizer in waste water,
Adjust pH value to 10～12；
（3）Logical compressed air is stirred, and promotes organic matter to aoxidize further；（4）Put into flocculating agent in waste water, measure simultaneously
COD value；
（5）Add oxidant when COD value is down to below lOOmg/L, and logical compressed air stirring makes organic matter fully oxidized；
（6）Finally with hydrochloric acid, solution ph is adjusted to 6～9, can discharge after waste water clarification.
2. oxidizing process according to claim 1 drops the chemical method of waste water COD it is characterised in that step（2）In neutralization
Agent is caustic soda or milk of lime.
3. oxidizing process according to claim 1 drops the chemical method of waste water COD it is characterised in that step（4）In cohesion
Agent is alum or polyacrylamide.
4. the chemical method of waste water COD is dropped it is characterised in that step according to the arbitrary described oxidizing process of claims 1 to 3（5）
In oxidant position ammonium persulfate, its injected volume be 1.2kg/m3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610507966.3A CN106430692A (en) | 2016-07-01 | 2016-07-01 | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610507966.3A CN106430692A (en) | 2016-07-01 | 2016-07-01 | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method |
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| CN106430692A true CN106430692A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610507966.3A Pending CN106430692A (en) | 2016-07-01 | 2016-07-01 | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093047A (en) * | 2022-06-21 | 2022-09-23 | 河北诚信集团有限公司 | Treatment method for byproduct high-salt wastewater |
| CN115845832A (en) * | 2022-11-24 | 2023-03-28 | 百色学院 | ZIF-8-derivatized ZnO/BiVO 4 Preparation method and application of heterojunction compound |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010041A (en) * | 2009-09-08 | 2011-04-13 | 王惠丰 | Deep treatment process for pulping and papermaking wastewater with low cost |
| CN102795747A (en) * | 2012-08-29 | 2012-11-28 | 重庆钢铁(集团)有限责任公司 | Waste water treatment process |
| CN202576156U (en) * | 2012-04-09 | 2012-12-05 | 泉州市天龙环境工程有限公司 | Treatment device for APMP (Alkaline Peroxide Mechanical Pulp) pulping waste water |
| CN102863103A (en) * | 2012-10-19 | 2013-01-09 | 广西绿晨环境工程有限公司 | Advanced treatment method for paper pulping and making wastewater |
-
2016
- 2016-07-01 CN CN201610507966.3A patent/CN106430692A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010041A (en) * | 2009-09-08 | 2011-04-13 | 王惠丰 | Deep treatment process for pulping and papermaking wastewater with low cost |
| CN202576156U (en) * | 2012-04-09 | 2012-12-05 | 泉州市天龙环境工程有限公司 | Treatment device for APMP (Alkaline Peroxide Mechanical Pulp) pulping waste water |
| CN102795747A (en) * | 2012-08-29 | 2012-11-28 | 重庆钢铁(集团)有限责任公司 | Waste water treatment process |
| CN102863103A (en) * | 2012-10-19 | 2013-01-09 | 广西绿晨环境工程有限公司 | Advanced treatment method for paper pulping and making wastewater |
Non-Patent Citations (1)
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|---|
| 刘存海 等: "造纸黑液循环利用的研究", 《陕西师范大学学报(自然科学版)》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093047A (en) * | 2022-06-21 | 2022-09-23 | 河北诚信集团有限公司 | Treatment method for byproduct high-salt wastewater |
| CN115093047B (en) * | 2022-06-21 | 2024-01-09 | 河北诚信集团有限公司 | Treatment method of byproduct high-salt wastewater |
| CN115845832A (en) * | 2022-11-24 | 2023-03-28 | 百色学院 | ZIF-8-derivatized ZnO/BiVO 4 Preparation method and application of heterojunction compound |
| CN115845832B (en) * | 2022-11-24 | 2024-05-07 | 百色学院 | ZIF-8 derived ZnO/BiVO4Preparation method and application of heterojunction compound |
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Application publication date: 20170222 |
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