CN102010087A - Method for treating nitro-cotton acid wastewater - Google Patents
Method for treating nitro-cotton acid wastewater Download PDFInfo
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- CN102010087A CN102010087A CN 201010591319 CN201010591319A CN102010087A CN 102010087 A CN102010087 A CN 102010087A CN 201010591319 CN201010591319 CN 201010591319 CN 201010591319 A CN201010591319 A CN 201010591319A CN 102010087 A CN102010087 A CN 102010087A
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Abstract
The invention relates to a method for treating nitro-cotton acid wastewater and belongs to the technical field of wastewater treatment. The method comprises that: the nitro-cotton acid wastewater automatically flows into a collector well and is pumped into a micro filter by a pump, and the micro filter screens the nitro-cotton; wastewater flows into a wastewater regulating reservoir from the bottom of the micro filter so as to regulate the water quality and water quantity in the wastewater regulating reservoir; the wastewater is quantitatively pumped into a neutralization reaction tank added with lime milk, and the wastewater is fully contacted and reacted with the lime milk to neutralize the acidity; the treated wastewater flows into a horizontal flow clarifier for settling; and the supernatant automatically flows into an activated sludge tank, organic matters in the wastewater are fully degraded by the activated sludge in the tank, the wastewater automatically flows into a radial flow sedimentation tank so as to effectively remove suspended matters in water, and the wastewater meets the emission standard. The method is low in cost, high in degree of automation and stable in operation and provides conditions for stable operation of biochemical treatment, a waterway blockage phenomenon cannot occur in an activated sludge treatment unit, and the performance of the sludge can be improved by rich Ca2+.
Description
Technical field
The present invention relates to a kind of method of handling nitro-cotton acid waste water, belong to technical field of waste water processing.
Background technology
Nitro-cotton acid waste water belongs to high acidity organic waste water, and its pH value is 1～2, and COD is 130～270mg/L, SO42-content≤4.5g/L.Usually adopt in rhombspar, Wingdale, caustic soda and the milk of lime conduct and medicament, wherein rhombspar or Wingdale are in N-process, the phenomenon that hardens not only appears easily, and can produce a large amount of greenhouse gases CO2 in the reaction process, disagree with the aim of low-carbon environment-friendly, caustic soda is as a kind of highly basic, not only the cost of use height, and corrodibility is strong, and equipment instrument and life safety are all had certain harm.Early stage nitro-cotton acid waste water lime slurry neutralisation, only be with acid waste water in lime and after, simple process effluxes, water outlet COD is between 80-150mg/L, not only can not stablize and reach first discharge standard 100mg/L, and early stage lime dosage can't accurately be controlled, cause the fluctuation of water outlet pH value and COD value, thereby can produce bigger impact to the downstream biochemical treatment, the mud of neutralization back generation adopts usually and manually draws clearly in addition, length consuming time, and the manning is many, working strength is big, and whole process working efficiency is low.
Along with country strengthens the overall control that water treatment contamination index is discharged, be the organic content that effectively reduces in the waste water, nitro-cotton acid waste water need carry out the organic content in the further biochemical process degrading waste water again after neutralizing treatment.
Summary of the invention
The objective of the invention is in order to propose a kind of method of handling nitro-cotton acid waste water, this method adopts full-automatic production model, easy and simple to handle, difficultly harden, latch up phenomenon, cost of use is low, water outlet COD is stable, satisfies country's " composite wastewater emission standard " primary standard, and helps improving the active sludge treatment efficient in downstream.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of handling nitro-cotton acid waste water of the present invention, concrete steps are:
1) nitro-cotton acid waste water is lifted into Microfilter by pump after flowing into pump well, and the Microfilter sieving goes out nitro-cotton, and waste water flows into wastewater equalization pond through the Microfilter bottom, carries out the adjusting of the water quality and the water yield in wastewater equalization pond;
Microfilter is made up of water inlet weir plate, drive unit, filter cylinder, protective guard, support etc.; Entire equipment is that stainless steel effectively prevents the sour water corrosion, and its function is the nitrocotton fiber material of effectively removing in the nitro-cotton acid waste water, prevents that water pump from stopping up, and guarantees subsequent processing device steady running;
2) waste water after will handling through step 1) quantitatively is lifted into by pump in the neutralization reaction pond that adds milk of lime, in the abundant contact reacts of waste water and milk of lime and acidity;
In the neutralization reaction pond, be provided with stirrer;
3) process step 2) waste water after the processing precipitates from flowing into the advection settling pond;
A large amount of CaSO that the advection settling pond produces for the precipitation acid-base neutralisation
4The slightly soluble urstoff, upper end, advection settling pond top is provided with bridge grabbing crane and grabs mud equipment, adopts the CaSO in the mechanical means extracting water
4Mud is transported outward processing;
4) flow into activated sludge tank certainly through the supernatant liquor after the step 3) processing, the organism in the waste water is fully degraded by the active sludge in the pond;
Aerator is set in the activated sludge tank, and by aeration, active sludge becomes suspended state, fully contacts with water; Suspended matter and jelly be by zoogloea absorption (biofloculation) in the waste water, and dissolved organic matter is by the nutrition of the microorganism in the zoogloea as self growth and breeding, and it is oxidized into final product (is mainly CO
2And H
2O); The carrier that active sludge also can become calcium salt makes the calcium salt crystallization can sweep along calcium salt that it is forwarded to the solid phase from liquid phase simultaneously, effectively removes the calcium salt in the water;
5) waste water after handling through step 4) is effectively removed in the water behind the suspended substance discharged wastewater met the national standard from flowing into radial-flow sedimentation tank;
Radial-flow sedimentation tank is used to precipitate active sludge, guarantees out that water suspension is up to standard.The radial-flow sedimentation tank bottom adopts best precipitation angle to design, and mud scraper is set in the pond, with sedimentary active sludge, scrapes into the center bucket and carries out subsequent disposal.
Beneficial effect
Cost of the present invention is low, level of automation is high and stable, and for the steady running of biochemical treatment provides condition, and stopping up the phenomenon in water route and can utilizing abundant Ca can not appear in the active sludge treatment unit
2+Improve the performance of mud.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment
A kind of method of handling nitro-cotton acid waste water, concrete steps are:
1) water yield is 3000m
3The nitro-cotton acid waste water of/d is lifted into Microfilter by pump after flowing into pump well, the Microfilter sieving goes out nitro-cotton, and waste water flows into wastewater equalization pond through the Microfilter bottom, carries out the adjusting of the water quality and the water yield in wastewater equalization pond;
Microfilter is made up of water inlet weir plate, drive unit, filter cylinder, protective guard, support etc.; Entire equipment is that stainless steel effectively prevents the sour water corrosion, and its function is the nitrocotton fiber material of effectively removing in the nitro-cotton acid waste water, prevents that water pump from stopping up, and guarantees subsequent processing device steady running;
2) waste water after will handling through step 1) quantitatively is lifted into by pump in the neutralization reaction pond that adds milk of lime, in the abundant contact reacts of waste water and milk of lime and acidity;
In the neutralization reaction pond, be provided with stirrer;
3) process step 2) waste water after the processing precipitates from flowing into the advection settling pond;
A large amount of CaSO that the advection settling pond produces for the precipitation acid-base neutralisation
4The slightly soluble urstoff, upper end, advection settling pond top is provided with bridge grabbing crane and grabs mud equipment, adopts the CaSO in the mechanical means extracting water
4Mud is transported outward processing;
4) flow into activated sludge tank certainly through the supernatant liquor after the step 3) processing, the organism in the waste water is fully degraded by the active sludge in the pond;
Aerator is set in the activated sludge tank, and by aeration, active sludge becomes suspended state, fully contacts with water; Suspended matter and jelly be by zoogloea absorption (biofloculation) in the waste water, and dissolved organic matter is by the nutrition of the microorganism in the zoogloea as self growth and breeding, and it is oxidized into final product (is mainly CO
2And H
2O); The carrier that active sludge also can become calcium salt makes the calcium salt crystallization can sweep along calcium salt that it is forwarded to the solid phase from liquid phase simultaneously, effectively removes the calcium salt in the water;
5) waste water after handling through step 4) is effectively removed in the water behind the suspended substance discharged wastewater met the national standard from flowing into radial-flow sedimentation tank;
Radial-flow sedimentation tank is used to precipitate active sludge, guarantees out that water suspension is up to standard.It is 20 degree that precipitation angle (angle of repose) is adopted in the radial-flow sedimentation tank bottom, and mud scraper is set in the pond, with sedimentary active sludge, scrapes into the center bucket and carries out subsequent disposal.
The result who handles nitro-cotton each stage of acid waste water through above steps is as shown in table 1:
Table 1 is each stage processing result of nitro-cotton acid waste water
| Sequence number | Analysis project | Initial water inlet | Microfilter | Neutralization+clarification | Active sludge | Spoke stream precipitation |
| 1 | COD(mg/L) | 270 | 250 | 150 | 85 | 85 |
| The COD clearance | / | 10％ | 40％ | 45％ | / | |
| 2 | BOD(mg/L) | 80 | 72 | 50 | 13.7 | 13.7 |
| The BOD clearance | 10％ | 30％ | 73％ | / | ||
| 3 | SS(mg/L) | 200 | 100 | 50 | 50 | 25 |
| The SS clearance | / | 50％ | 50％ | / | 50％ | |
| 4 | CaSO 4(g/L) | / | / | 2.00 | 1.0 | |
| 5 | Ca 2+(g/L) | / | / | 1.03 | 0.88 |
Passing through the effluent quality of the nitro-cotton acid waste water after aforesaid method is handled and going out water quality standard contrasts as shown in table 2:
Table 2 is handled the back effluent quality and is gone out the water quality standard contrast
| Sequence number | Project | Effluent quality | Go out water quality standard |
| 1 | pH | 7.4±0.3 | 6-9 |
| 3 | BOD 5 | ≤13.7mg/L | ≤20mg/L |
| 4 | COD cr | ≤85mg/L | ≤100mg/L |
| 5 | SS | ≤25mg/L | ≤70mg/L |
As shown in Table 2, the effluent quality of nitro-cotton acid waste water after treatment reaches water quality standard, can discharge.
Claims (6)
1. method of handling nitro-cotton acid waste water is characterized in that concrete steps are:
1) nitro-cotton acid waste water is lifted into Microfilter by pump after flowing into pump well, and the Microfilter sieving goes out nitro-cotton, and waste water flows into wastewater equalization pond through the Microfilter bottom, carries out the adjusting of the water quality and the water yield in wastewater equalization pond;
2) waste water after will handling through step 1) quantitatively is lifted into by pump in the neutralization reaction pond that adds milk of lime, in the abundant contact reacts of waste water and milk of lime and acidity;
3) process step 2) waste water after the processing precipitates from flowing into the advection settling pond;
4) flow into activated sludge tank certainly through the supernatant liquor after the step 3) processing, the organism in the waste water is fully degraded by the active sludge in the pond;
5) waste water after handling through step 4) is effectively removed in the water behind the suspended substance discharged wastewater met the national standard from flowing into radial-flow sedimentation tank.
2. a kind of method of handling nitro-cotton acid waste water according to claim 1 is characterized in that: used Microfilter is made up of water inlet weir plate, drive unit, filter cylinder, protective guard, support; Entire equipment is that stainless steel effectively prevents the sour water corrosion.
3. a kind of method of handling nitro-cotton acid waste water according to claim 1 is characterized in that: be provided with stirrer in the neutralization reaction pond.
4. a kind of method of handling nitro-cotton acid waste water according to claim 1 is characterized in that: a large amount of CaSO that the advection settling pond produces for the precipitation acid-base neutralisation
4The slightly soluble urstoff, upper end, advection settling pond top is provided with bridge grabbing crane and grabs mud equipment, adopts the CaSO in the mechanical means extracting water
4Mud is transported outward processing.
5. a kind of method of handling nitro-cotton acid waste water according to claim 1 is characterized in that: aerator is set in the activated sludge tank, and by aeration, active sludge becomes suspended state, fully contacts with water; Suspended matter and jelly are adsorbed by zoogloea in the waste water, and dissolved organic matter is by the nutrition of the microorganism in the zoogloea as self growth and breeding, and it is oxidized into final product CO
2And H
2O; Active sludge is that the carrier of calcium salt makes the calcium salt crystallization can sweep along calcium salt that it is forwarded to the solid phase from liquid phase simultaneously, effectively removes the calcium salt in the water.
6. a kind of method of handling nitro-cotton acid waste water according to claim 1, it is characterized in that: radial-flow sedimentation tank is used to precipitate active sludge, guarantee out that water suspension is up to standard, the radial-flow sedimentation tank bottom is provided with mud scraper in the pond, with sedimentary active sludge, scrape into the center bucket and carry out subsequent disposal.
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| CN 201010591319 CN102010087A (en) | 2010-12-16 | 2010-12-16 | Method for treating nitro-cotton acid wastewater |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358677A (en) * | 2011-09-16 | 2012-02-22 | 中国电力工程顾问集团西北电力设计院 | Coal slime treatment process |
| CN102992512A (en) * | 2012-10-15 | 2013-03-27 | 天津市亿博制钢有限公司 | Treatment method of industrial wastewater |
| CN103964628A (en) * | 2013-02-01 | 2014-08-06 | 北京北方节能环保有限公司 | Method for carrying out denitrogenation treatment on nitrocellulose acid water by adopting refined cotton black liquid as carbon source |
| 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 |
| CN105329958A (en) * | 2015-11-20 | 2016-02-17 | 四川北方硝化棉股份有限公司 | Method for recovering nitro-cotton flock from dehydration wastewater of nitro-cotton |
| WO2019046987A1 (en) * | 2017-09-06 | 2019-03-14 | 吴鹏菲 | Device and method for filtering nitrocellulose chips in waste water |
| CN114130090A (en) * | 2021-11-29 | 2022-03-04 | 北方化学工业股份有限公司 | Recovery treatment method of nitrocotton wastewater |
| CN118373515A (en) * | 2024-06-24 | 2024-07-23 | 北京博汇特环保科技股份有限公司 | Nitrocotton production wastewater treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205105A (en) * | 2007-12-18 | 2008-06-25 | 中国兵器工业第五二研究所 | Regeneration treatment and cyclic utilization method of printing and dyeing wastewater |
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2010
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101205105A (en) * | 2007-12-18 | 2008-06-25 | 中国兵器工业第五二研究所 | Regeneration treatment and cyclic utilization method of printing and dyeing wastewater |
Non-Patent Citations (1)
| Title |
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| 《环境科学与技术》 20070731 申石泉等 硝化棉废水处理系统优化运行研究 第30卷, 第7期 2 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358677A (en) * | 2011-09-16 | 2012-02-22 | 中国电力工程顾问集团西北电力设计院 | Coal slime treatment process |
| CN102992512A (en) * | 2012-10-15 | 2013-03-27 | 天津市亿博制钢有限公司 | Treatment method of industrial wastewater |
| CN103964628A (en) * | 2013-02-01 | 2014-08-06 | 北京北方节能环保有限公司 | Method for carrying out denitrogenation treatment on nitrocellulose acid water by adopting refined cotton black liquid as carbon source |
| 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 |
| CN105329958A (en) * | 2015-11-20 | 2016-02-17 | 四川北方硝化棉股份有限公司 | Method for recovering nitro-cotton flock from dehydration wastewater of nitro-cotton |
| CN105329958B (en) * | 2015-11-20 | 2018-05-04 | 四川北方硝化棉股份有限公司 | The recovery method of flocking is nitrified in a kind of nitrocotton dehydration waste water |
| WO2019046987A1 (en) * | 2017-09-06 | 2019-03-14 | 吴鹏菲 | Device and method for filtering nitrocellulose chips in waste water |
| CN114130090A (en) * | 2021-11-29 | 2022-03-04 | 北方化学工业股份有限公司 | Recovery treatment method of nitrocotton wastewater |
| CN118373515A (en) * | 2024-06-24 | 2024-07-23 | 北京博汇特环保科技股份有限公司 | Nitrocotton production wastewater treatment method |
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Application publication date: 20110413 |