CN102267780B - Treatment method for wastewater containing refined cotton - Google Patents
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- CN102267780B CN102267780B CN 201110171937 CN201110171937A CN102267780B CN 102267780 B CN102267780 B CN 102267780B CN 201110171937 CN201110171937 CN 201110171937 CN 201110171937 A CN201110171937 A CN 201110171937A CN 102267780 B CN102267780 B CN 102267780B
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Abstract
Belonging to the technical field of wastewater treatment, the invention relates to a treatment method for wastewater containing refined cotton. The method comprises the steps of: adding wastewater of high concentration refined cotton into a high concentration alkaline water circulating pool for precipitating a thick black liquid and impurities, lifting the precipitated thick black liquid and impurities to an acid precipitation sedimentation pool, adjusting the pH value with nitrocotton acid water, so that lignin can be precipitated under an acidic condition, discharging the supernatant into wastewater of low concentration refined cotton; when the discharge is over, subjecting the sludge in a mud bucket to dehydration in a box filter press, and making the removed water also enter the wastewater of low concentration refined cotton; after the balance of water quality and quantity of the wastewater of low concentration refined cotton in a grid structure alkaline water adjusting pool, pumping neutral air flotation into the adjusting pool, and then making the wastewater of low concentration refined cotton flow into an anaerobic pool, an aerobic pool, a first sedimentation pool and a coagulation sedimentation pool in order; in the coagulation sedimentation pool, adding a coagulant on the basis of the water COD (chemical oxygen demand) for removing COD and chroma, so that the discharged water can reach the "discharge standard for water pollutants from ordnance industry powder ". Characterized by waste control by waste, the method of the invention has high wastewater treatment efficiency, low operation cost and high operation stability.
Description
Technical field
The present invention relates to contain the treatment process of purified cotton waste water, belong to technical field of waste water processing.
Background technology
Purified cotton, nitro-cotton produce a large amount of alkaline waste waters and acid waste water in process of production, mainly contain sulfuric acid and nitric acid (sulfuric acid and nitric acid ratio are 10: 5) in the acid waste water, mainly contain fat in the alkaline waste water, protein, pectin, tannin, the material of the difficult degraded such as xylogen, hemicellulose has that COD is high, colourity is high, the SS high.
Purified cotton is fabricated to high energy consumption, high pollution industry, the basic dependence on import of developed country.Domestic real technique to the purified cotton wastewater treatment be purified cotton black liquor all acid gassing floating+neutralization precipitation+anaerobism+aerobic+two are heavy+coagulative precipitation tank.
The main drawback of this technique is that working cost is high, 6 yuan of ton water running expenses; Next is to add colourity and COD behind the alkali neutralization precipitation in various degree rise is arranged; Moreover be the saltiness that neutralization has increased waste water behind the first acid out, reduced biochemical treatment efficient, increased simultaneously the dosage of coagulative precipitation tank.
Existing purified cotton wastewater processing technology: purified cotton black liquor all acid gassing is floating+and neutralization precipitation+anaerobism+aerobic+two are heavy+coagulative precipitation tank.Acid out air supporting is namely by adding nitro-cotton acid wastewater in all alkaline waste waters of purified cotton, the pH of two kinds of water is blent to 2-3, and xylogen, the Mierocrystalline cellulose that will be dissolved under acidic conditions in the waste water separate out, and are isolated by air supporting; (this unit operation ton water adds caustic soda 0.7-1.3 kilogram to clear water after the acid out air supporting to neutrality by the flame enrichment adjusting PH with base, 2.3 yuan/tons of working costs are amounted in average individual event), just can advance anaerobism, aerobic, second pond biochemical system, final by add a large amount of coagulating agent (1.8 yuan/tons of working costs are amounted in individual event) at coagulative precipitation tank, 6 yuan of ton water running expenses, treatment effect reaches " weapon industry pollution discharge standard fire explosive " (GB144703.1-2002) industry standard that is constructed and put into operation before on June 30th, 2003, i.e. COD reluctantly
Cr≤ 300mg/L BOD
5≤ 100mg/L SS≤150mg/L colourity≤200 times pH:6～9.
Purified cotton waste water is " four high one is low " waste water, and namely COD, SS, colourity, pH are high, and BOD/COD is low, BOD/COD≤0.3, and biodegradability is relatively poor; Higher basicity pH (≈ 12) is can not be directly biochemical, must add nitro-cotton waste water and regulate pH to neutral, finally forms new " four high one is low " waste water, and namely COD, SS, colourity, saltiness are high, and difficulty of governance is well imagined.All the purified cotton black liquor adopts acid out air supporting+neutralization+anaerobism+aerobic+two to sink+the coagulative precipitation tank treatment process, is relatively reasonable theoretically, has just ignored working cost.
Current, domestic advanced person's purified cotton production line ton product row black liquor amount is 45 tons, if 6 yuan of ton water running expenses, then ton product improvement pollution charges are 270 yuan, maintain an equal level with the gross profit of product, so high working cost has limited the development of enterprise so that must play working cost beyond one's means of engineering in the treatment facility enterprise.
Summary of the invention
The objective of the invention is for the treatment of wastes with processes of wastes against one another, solve the purified cotton waste water treatment efficiency and hang down and the high problem of working cost, propose to contain the treatment process of purified cotton waste water.
The objective of the invention is to be achieved through the following technical solutions.
The treatment process that contains purified cotton waste water of the present invention, concrete steps are:
Purified cotton high-concentration waste water and low concentration wastewater in the purified cotton production process are separated from administering the source, the purified cotton high-concentration waste water joined precipitate concentrated black liquid impurity in the high concentration alkali water circulation tank, concentrated black liquid after the precipitation and impurity are promoted to the acid out settling tank with pump, in the acid out settling tank, add the nitro-cotton sour water and regulate the pH value between 2.0～3.0, xylogen in concentrated black liquid and the impurity is separated out under acidic conditions, staticly settle in the bucket of postprecipitation in the acid out settling tank, the supernatant liquor above the bucket be disposed in the purified cotton low concentration wastewater and in and the basicity in the low concentration wastewater; The mud that supernatant liquor above the bucket discharges in the complete rear bucket enters the chamber-type press filter dehydration, and the water that takes off also enters the purified cotton low concentration wastewater; The purified cotton low concentration wastewater enters in the grid buck equalizing tank behind the balanced water quality and quantity together with the supernatant liquor that enters and filtering water, pumps into neutral air supporting, and then flows into successively anaerobic pond, Aerobic Pond, the first settling tank and coagulative precipitation tank; COD according to water in coagulative precipitation tank adds coagulating agent, removes COD and colourity, makes its COD value make water outlet reach emission standard.
The basicity of water is 5-15g/L in the above-mentioned high concentration alkali water circulation tank, and COD is 30000-40000mg/L, and colourity is 10000 times; The SS of concentrated black liquid impurity is 2000～4000mg/L; The COD of the water that enters the supernatant liquor in the purified cotton low concentration wastewater and take off is 6000-8000mg/L, and SS is 50～100mg/L, and colourity is 2000 times; The COD of the nitro-cotton sour water that adds in the acid out settling tank is 500-1000mg/L, and SS is 200-400mg/L, and colourity is 0, and acidity is 10-20g/L; The COD of water is 400-1000mg/L when entering coagulative precipitation tank, and SS is 200-400mg/L, and colourity is 1000 times, and the water outlet COD in coagulative precipitation tank behind the process coagulating sedimentation is 100-150mg/L, and SS is 20-80mg/L, and colourity is 80 times.
Water outlet after processing through said process reach " weapon industry pollution discharge standard fire explosive " (GB144703.1-2002) on July 1st, 2003 the later industry standard that is constructed and put into operation, i.e. COD
Cr≤ 150mg/L, BOD
5≤ 60mg/L, SS≤100mg/L, colourity≤80 times, pH is 6～9, ton water running expense is less than 3 yuan.
Beneficial effect
The method treatment of wastes with processes of wastes against one another of the present invention is processed waste water efficient high, and running cost is low, and operation stability is high.
Description of drawings
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment
Purified cotton high-concentration waste water and low concentration wastewater in the purified cotton production process are separated from administering the source, the purified cotton high-concentration waste water is joined in the high concentration alkali water circulation tank, the basicity average out to 10g/L of water in the high concentration alkali water circulation tank, in the high concentration alkali water circulation tank, precipitate xylogen, the impurity such as silt and cottonseed, the high impurity of its supernatant liquor basicity can return less the production operation and re-use, its throw out is that concentrated black liquid and impurity are promoted to the acid out settling tank with pump, in the acid out settling tank, add the nitro-cotton sour water and regulate the pH value at 2.0-3.0, xylogen contained in the impurity is separated out under acidic conditions, after staticly settling, xylogen is deposited in the bucket in the acid out settling tank, the supernatant liquor above the bucket be disposed to the purified cotton low concentration wastewater and in and the basicity in the low concentration wastewater; The mud that supernatant liquor above the bucket discharges in the complete rear bucket enters the chamber-type press filter dehydration, and the water that takes off also enters the purified cotton low concentration wastewater, and the filter residue after the pressure filter dehydration is neutralized to then landfill of neutrality with lime mud; The purified cotton low concentration wastewater enters in the grid buck equalizing tank behind the balanced water quality and quantity together with the supernatant liquor that enters and filtering water, pumps into neutral air supporting, and then flows into successively anaerobic pond, Aerobic Pond, the first settling tank and coagulative precipitation tank; In coagulative precipitation tank, add Tai-Ace S 150, make water outlet reach emission standard;
The treatment capacity of above-mentioned purified cotton waste water is 4000m3/d, and processing the amount that every cubic metre waste water adds coagulating agent in the coagulative precipitation tank is 1.2 kilograms; Water outlet after processing through said process reach " weapon industry pollution discharge standard fire explosive " (GB144703.1-2002) on July 1st, 2003 the later industry standard that is constructed and put into operation, i.e. COD
Cr≤ 150mg/L, BOD
5≤ 60mg/L, SS≤100mg/L, colourity≤80 times, pH is 6～9, ton water running expense is less than 3 yuan.
COD data after the purified cotton waste water of processing through aforesaid method in September, 2010 is removed through each unit are as shown in table 1:
Table 1COD (mg/L) data sheet
Claims (2)
1. the treatment process that contains purified cotton waste water is characterized in that concrete steps are:
Purified cotton high-concentration waste water and low concentration wastewater in the purified cotton production process are joined the purified cotton high-concentration waste water after separately and precipitate concentrated black liquid and impurity the high concentration alkali water circulation tank from administering the source, concentrated black liquid after the precipitation and impurity are promoted to the acid out settling tank with pump, in the acid out settling tank, add the nitro-cotton sour water and regulate the pH value to 2-3, xylogen in the impurity is separated out under acidic conditions, staticly settle in the bucket of postprecipitation in the acid out settling tank, the supernatant liquor above the bucket be disposed in the purified cotton low concentration wastewater and in and the basicity in the low concentration wastewater; Supernatant liquor discharging above the bucket is complete, and the mud in the bucket enters the chamber-type press filter dehydration, and the water that takes off also enters the purified cotton low concentration wastewater; The purified cotton low concentration wastewater enters in the grid buck equalizing tank behind the balanced water quality and quantity together with the supernatant liquor that enters and the water that takes off, pumps into neutral air supporting, and then flows into successively anaerobic pond, Aerobic Pond, the first settling tank and coagulative precipitation tank; COD according to water in coagulative precipitation tank adds coagulating agent, regulates its COD value and makes water outlet reach " weapon industry pollution discharge standard fire explosive " (GB144703.1-2002) emission standard.
2. the treatment process that contains purified cotton waste water according to claim 1 is characterized in that: the coagulating agent that adds in the coagulative precipitation tank is Tai-Ace S 150.
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| CN 201110171937 CN102267780B (en) | 2011-06-24 | 2011-06-24 | Treatment method for wastewater containing refined cotton |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103964628B (en) * | 2013-02-01 | 2015-08-05 | 北京北方节能环保有限公司 | A kind of with purified cotton black liquor for carbon source carries out the method for nitro-cotton sour water denitrogenation processing |
| CN104193101A (en) * | 2014-09-10 | 2014-12-10 | 四川北方硝化棉股份有限公司 | Biochemical treatment process of nitrocotton acidic wastewater |
| CN104355461A (en) * | 2014-12-03 | 2015-02-18 | 四川北方硝化棉股份有限公司 | Method for preprocessing strong black liquor |
| CN107758979A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of woodwork processing wastewater treatment method and processing unit |
| CN106746025B (en) * | 2017-01-24 | 2020-04-28 | 四川大学 | Method for treating purified cotton wastewater |
| CN111268832B (en) * | 2020-01-23 | 2022-03-25 | 天津大学 | Separation and dehydration treatment method and device for high-organic-matter high-salt wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034525A (en) * | 1988-01-28 | 1989-08-09 | 重庆市环境保护工具设计研究所 | The decoloring method of papermaking, ramie, purified cotton black digestion liquid |
| CN201062224Y (en) * | 2007-04-28 | 2008-05-21 | 广州市浩蓝环保技术有限公司 | Sewage water treatment system for refining cotton |
| CN101468859A (en) * | 2007-12-28 | 2009-07-01 | 北京锦奥华荣科技有限公司 | Advanced purification treatment system for high concentrated organic wastewater |
| CN201751389U (en) * | 2010-06-10 | 2011-02-23 | 张希华 | Cotton pulp sewage treatment equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0118749D0 (en) * | 2001-08-01 | 2001-09-26 | Procter & Gamble | Water treatment compositions |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034525A (en) * | 1988-01-28 | 1989-08-09 | 重庆市环境保护工具设计研究所 | The decoloring method of papermaking, ramie, purified cotton black digestion liquid |
| CN201062224Y (en) * | 2007-04-28 | 2008-05-21 | 广州市浩蓝环保技术有限公司 | Sewage water treatment system for refining cotton |
| CN101468859A (en) * | 2007-12-28 | 2009-07-01 | 北京锦奥华荣科技有限公司 | Advanced purification treatment system for high concentrated organic wastewater |
| CN201751389U (en) * | 2010-06-10 | 2011-02-23 | 张希华 | Cotton pulp sewage treatment equipment |
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