CN103936227A - Integrated process for slaughter wastewater treatment - Google Patents

Integrated process for slaughter wastewater treatment Download PDF

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Publication number
CN103936227A
CN103936227A CN201410152230.XA CN201410152230A CN103936227A CN 103936227 A CN103936227 A CN 103936227A CN 201410152230 A CN201410152230 A CN 201410152230A CN 103936227 A CN103936227 A CN 103936227A
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China
Prior art keywords
aeration
entering
water
tank
sbr
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Pending
Application number
CN201410152230.XA
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Chinese (zh)
Inventor
单连斌
王允妹
陈明
赵勇娇
臧雪莉
刘士军
陈星�
于洋业
马彦峰
单则霖
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Shenyang Academy Environmental Sciences
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Shenyang Academy Environmental Sciences
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Application filed by Shenyang Academy Environmental Sciences filed Critical Shenyang Academy Environmental Sciences
Priority to CN201410152230.XA priority Critical patent/CN103936227A/en
Publication of CN103936227A publication Critical patent/CN103936227A/en
Pending legal-status Critical Current

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Abstract

The invention provides an integrated process for slaughter wastewater treatment. The integrated process is used for solving the problems that the COD (Chemical Oxygen Demand) and ammonia nitrogen of treated water do not reach the desired emission standards and outlet water does not reach the standard. The process comprises the process flows of charging water, entering a grille, entering an oil separating advection sedimentation tank, entering a regulation pool, entering an air flotation tank, entering a hydrolytic acidification tank, entering an SBR (Sequencing Batch Reactor), entering a BAF (Biological Aerated Filter) tank, entering a disinfection tank and discharging water, wherein the operation of the SBR comprises the processes of refluxing sludge and refluxing a mixed liquid; the aeration of the SBR is intermittent aeration, namely (1) aerating while charging water; (2) stopping charging water, stopping aerating, and standing for a period of time; (3) aerating again; (4) stopping aerating and carrying out sedimentation; and (5) draining, and adopting a push rod to change speed so as to control a water decanter during draining. The process has the positive effects that a large number of suspended substances, oil and fat and the like are removed through pretreatment, so that the load of subsequent treatment facilities is lowered; and the BAF tank is additionally arranged to further remove the suspended substances and ammonia nitrogen, so that a treatment system stably reaches the standard.

Description

A kind of integrated technique of slaughterhouse wastewater processing
Technical field
The present invention relates to a kind of method of wastewater treatment, is a kind of integrated technique of slaughterhouse wastewater processing specifically.
Background technology
The processing technological flow of Fuxin Shuan Hui meat processing company limited raw waste water treatment station is, waste water (water inlet) → grid → oil separation grit chamber → equalizing tank → hydrolysis acidification pool (ABR pond) → biochemical treatment facility (SBR pond) → sterilization pool → water outlet after butchering, the water outlet after sterilization pool is outwards discharged.The problem that former technical process exists is:
1, a large amount of ight soil and the grease etc. that in slaughtering process, produce, make the suspended solid SS in the waste water after butchering higher, former technique is not done pre-treatment effectively for such water inlet feature, cause equalizing tank, oil separation grit chamber and bottom, ABR pond to occur a large amount of settled sludges, on the liquid level of ABR pond, there are a large amount of grease floating matters, wherein being partly dissolved property grease digests because of overstand, and floats with other suspended substances, thereby has affected the normal operation of a whole set for the treatment of facility;
2, chemical oxygen demand (COD) (COD), the ammonia nitrogen value of water inlet far exceed original design scope, and former technique do not take denitrogenation design, cause technique without denitrification functions, cause water outlet COD, ammonia nitrogen not up to standard;
3, ABR pond does not have descum device, causes entering the object height that suspends in the water of SBR pond, affects SBR pond operating performance;
4, SBR pond adopts jet continous way aeration (i.e. continuous aeration between the water inlet of the SBR cycle of operation and draining), and aeration efficiency is low, utilization rate of tank volume is low, causes water outlet COD and ammonia nitrogen not up to standard.
5, former SBR pond adopts lifting pontoon type decanting device, and drainage effect is poor, has some setbacks, and suspended substance is easily got rid of with water, causes out water suspension not up to standard.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide a kind of integrated technique of guaranteeing steady running slaughterhouse wastewater processing up to standard.
Technical process of the present invention is: water inlet → grid → oil removal horizontal sedimentation tank → equalizing tank → air flotation pool → hydrolysis acidification pool (ABR pond) → SBR pond → BAF (BAF pond) → sterilization pool → water outlet.
The present invention has increased oil removal horizontal sedimentation tank, air flotation pool and BAF pond on the basis of original technique, has changed operation scheme, aeration mode and the drainage pattern in SBR pond.
1, after the oil removal horizontal sedimentation tank increasing and air flotation pool, solved suspended substance problem (problems of equalizing tank, ABR pond bottom settled sludge and the floating dregs of fat of ABR pond liquid level);
2, the operation scheme, aeration mode and the drainage pattern that have changed SBR pond, solved removal COD and Denitrogenation;
The operation scheme in said change SBR pond refers to, has increased mud and mixed-liquor return technique, makes SBR pond possess denitrogenation dephosphorizing ability, and has improved the removal efficiency of COD; Said change aeration mode refers to, within the SBR cycle of operation, takes intermittent aeration, i.e. 1. water inlet, simultaneously aeration; 2. water inlet stops, and aeration stops, and leaves standstill for some time; 3. aeration again; 4. stop aeration, sedimentation; 5. draining.
Due to original aeration time is compressed, so aeration intensity strengthens to some extent.As calculated, the aeration intensity of intermittent aeration is continuous aeration 1.5 times.And by the programming of PLC, can specifically regulate above processing parameter according to practical situation.Change drainage pattern and refer to, draining adopts push rod variable speed control to strain hydrophone, makes the self controllable operation of draining, and suspended substance easily holds back, and has solved former SBR pond and has adopted lifting pontoon type decanting device, and drainage effect is poor, have some setbacks, and the problem that suspended substance is easily got rid of with water.
3,, because whole system also faces ammonia nitrogen problem not up to standard, increase BAF pond and further remove suspended substance and ammonia nitrogen etc.
After transformation, compared with original technology, positively effect of the present invention is: a large amount of suspended substances, grease etc. have been removed in pre-treatment (oil removal precipitation and air supporting), are subsequent disposal system, have reduced load; The adjustment of remodeling SBR technology controlling and process sequential has increased denitrification functions, also makes can form aerobic granular sludge in system, widely the treatment effect of enhanced system; Suspended substance is further removed in increase BAF pond and ammonia nitrogen makes treatment system stably reaching standard.
Embodiment
The technical process of the present embodiment is: water inlet → grid → oil removal horizontal sedimentation tank → equalizing tank → air flotation pool → hydrolysis acidification pool → SBR pond → BAF pond → sterilization pool → water outlet.
The present embodiment has increased oil removal horizontal sedimentation tank, air flotation pool and BAF pond on the basis of original technique, has changed operation scheme, aeration mode and the drainage pattern in SBR pond.
1, after the oil removal horizontal sedimentation tank increasing and air flotation pool, solved suspended substance problem (problems of equalizing tank, ABR pond bottom settled sludge and the floating dregs of fat of ABR pond liquid level): oil removal horizontal sedimentation tank arranges frizing mud scraper, the settled sludge that a large amount of greases and macrobead suspended substance are formed is discharged, and air flotation pool utilizes micro bubble by the removal of further floating of suspended substance tiny in water and grease;
2, the operation scheme, aeration mode and the drainage pattern that have changed SBR pond, solved removal COD and Denitrogenation;
The operation scheme in said change SBR pond refers to, increase sludge reflux and mixed-liquor return technique, and wherein return sludge ratio is 50%, return current ratio of the mixed liquid is 100%, makes SBR pond possess denitrogenation dephosphorizing ability, and has improved the removal efficiency of COD; Said change aeration mode refers to, within the SBR cycle of operation, takes intermittent aeration, taking 8 hours periods as example: aeration 2 hours when 1. water inlet; 2. stop into water, stop aeration, leave standstill 2 hours; 3. aeration 2 hours again; 4. stop aeration, sedimentation 1 hour; 5. draining 1 hour.Draining adopts push rod variable speed control to strain hydrophone, make the self controllable operation of draining, and suspended substance is easily held back.

Claims (2)

1. an integrated technique for slaughterhouse wastewater processing, is characterized in that: water inlet → grid → oil removal horizontal sedimentation tank → equalizing tank → air flotation pool → hydrolysis acidification pool → SBR pond → BAF pond → sterilization pool → water outlet;
Wherein, the operation in SBR pond comprises: sludge reflux and mixed-liquor return technique; The aeration in SBR pond is intermittent aeration, 1. at when water inlet aeration simultaneously; 2., when water inlet stops, aeration also stops for some time thereupon; 3. aeration; 4. stop aeration, sedimentation; 5. draining, draining adopts push rod variable speed control to strain hydrophone.
2. according to the integrated technique of a kind of slaughterhouse wastewater processing claimed in claim 1, it is characterized in that: the operation in SBR pond comprises sludge reflux and mixed-liquor return technique, wherein return sludge ratio is 50%, and return current ratio of the mixed liquid is 100%; Said intermittent aeration is: aeration 2 hours when 1. water inlet; 2. stop into water, stop aeration, leave standstill 2 hours, 3. aeration 2 hours again; 4. stop aeration, sedimentation 1 hour; 5. draining 1 hour.
CN201410152230.XA 2014-04-16 2014-04-16 Integrated process for slaughter wastewater treatment Pending CN103936227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410152230.XA CN103936227A (en) 2014-04-16 2014-04-16 Integrated process for slaughter wastewater treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410152230.XA CN103936227A (en) 2014-04-16 2014-04-16 Integrated process for slaughter wastewater treatment

Publications (1)

Publication Number Publication Date
CN103936227A true CN103936227A (en) 2014-07-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105254113A (en) * 2014-10-12 2016-01-20 砀山圣沣食品有限公司 Slaughter wastewater treatment device
CN108706819A (en) * 2018-05-28 2018-10-26 湖南苍水环保科技有限公司 A kind of method of HC high-effective microorganisms processing livestock and poultry cultivation sewage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515430A (en) * 2011-12-14 2012-06-27 湖南农业大学 Live pig slaughtering wastewater treating method
CN102531269A (en) * 2010-12-27 2012-07-04 宜兴市金琪洋生物质环境治理技术咨询有限公司 Pig farm wastewater treatment method
CN102992548A (en) * 2012-12-06 2013-03-27 山东名科环保工程有限公司 Method for treating low-temperature slaughter wastewater

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102531269A (en) * 2010-12-27 2012-07-04 宜兴市金琪洋生物质环境治理技术咨询有限公司 Pig farm wastewater treatment method
CN102515430A (en) * 2011-12-14 2012-06-27 湖南农业大学 Live pig slaughtering wastewater treating method
CN102992548A (en) * 2012-12-06 2013-03-27 山东名科环保工程有限公司 Method for treating low-temperature slaughter wastewater

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王玺等: "气浮-水解酸化-CASS-BAF处理屠宰废水工程实践", 《河南机电高等专科学校学报》, vol. 21, no. 6, November 2013 (2013-11-01) *
董守旺: "气浮- 水解酸化- SBR 工艺在屠宰废水处理中的应用研究", 《环境科学与管理》, vol. 39, no. 2, February 2014 (2014-02-01) *
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105254113A (en) * 2014-10-12 2016-01-20 砀山圣沣食品有限公司 Slaughter wastewater treatment device
CN108706819A (en) * 2018-05-28 2018-10-26 湖南苍水环保科技有限公司 A kind of method of HC high-effective microorganisms processing livestock and poultry cultivation sewage

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Application publication date: 20140723

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