CN105461174A - Method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater - Google Patents
Method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater Download PDFInfo
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- CN105461174A CN105461174A CN201510974866.7A CN201510974866A CN105461174A CN 105461174 A CN105461174 A CN 105461174A CN 201510974866 A CN201510974866 A CN 201510974866A CN 105461174 A CN105461174 A CN 105461174A
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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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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Abstract
The invention provides a method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater. The method comprises the following steps: firstly, physically separating ammonia nitrogen from livestock wastewater through a mechanical grid and a solid-liquid separator to obtain residue-isolated wastewater; performing anaerobic fermentation, and performing two-stage hypoxic-aerobic biochemical treatment in order that the nitrogen removal efficiency can be up to 90-95 percent; lastly, arranging a breakpoint chlorination pond at the water outlet of a secondary biological sedimentation pond, and adding a sodium hypochlorite solution once an ammonia nitrogen value exceeds a design value in order to ensure complete removal of the ammonia nitrogen from the wastewater. The method has the advantages of stability, reliability, high automation degree, low running cost, low labor intensity and high impact load resistance, and is worthy of popularization and application. By adopting the method, discharge of the ammonia nitrogen up to standards can be ensured continuously and stably for a long time.
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to the removal technology that high ammonia nitrogen in clear excrement breeding wastewater is done on a kind of pig farm.
Background technology
Along with the development of economy, growth in the living standard, pig-breeding industry is also in continuous development, the process of the movements such as the excrement produced in breeding process, urine and flushing pig house waste water is paid attention to day by day, the waste water that pig-breeding produces is the waste water of a kind of high COD, high BOD, high ammonia nitrogen, high SS, biodegradability is good, and this direct discharging of waste water will cause serious environmental pollution, and the ammonia nitrogen simultaneously in sewage is one of important factor causing body eutrophication.
The dense of ammonia nitrogen in clear excrement breeding wastewater is done on pig farm, mainly exists in water with the form of ammonium ion (NH4+) and free ammonia (NH3).
In the multiple denitrogenation method applied at present, biological denitrificaion method remains the Main Means of denitrogenation of waste water, and it mainly includes ammonification, the Ammonia Nitrification of machine nitrogen, the steps such as the decomposition of nitrate or denitrification.Traditional denitrogenation theory is that the removal of ammonia nitrogen was completed by two stages of nitrification and denitrification, because nitrifier is different with the requirement of denitrifying bacteria to envrionment conditions, these two processes can not occur simultaneously, and can only carry out by list type, namely under nitration reaction occurs in aerobic condition, by autotrophic bacteria using oxygen as electron acceptor(EA), NH4
+-N is oxidized to NO
2 --N and NO
3 --N.Specifically, usually NH4
+-N is oxidized to NO
2 -the process of-N is called nitrosation process, is completed by nitrococcus; NO
2 --N is converted into NO
3 -the process of-N is called nitrifying process, is completed by nitrifier, and these two processes are referred to as nitrifying process again sometimes.Anti-nitration reaction is under anoxic or anaerobic condition, by heterotrophic bacterium with NO
2 -and NO
3 -as electron acceptor(EA), be reduced into gaseous substance and discharged.Anoxic process and aerobic processes are separately carried out by traditional biological denitrification process mostly, form classification nitration denitrification technique.But the method exists ammonia nitrogen removal limited efficacy, and processing method is single, take up room large shortcoming, usually there will be sewage disposal problem not up to standard in actual use.
Another kind of break point chlorination is passed in waste water by chlorine to reach certain a bit, and at this time, water free chlorine content is lower, and the concentration of ammonia reduces to zero.When chlorine intake exceedes this, the free chlorine in water will increase.Therefore, this point is called break, and the chlorination under this state is called breakpoint chlorination.The mechanism that break point chlorination removes ammonia is that chlorine and ammonia react generate harmless nitrogen, and its shortcoming is: chlorine dosage is large, costly.
Given this, how to design the minimizing technology of high ammonia nitrogen in a kind of Pig raising wastewater economically and reasonably, become this area problem demanding prompt solution.
Summary of the invention
For overcoming above-mentioned technical problem, the present invention is to provide the minimizing technology that high ammonia nitrogen in clear excrement breeding wastewater is done on a kind of pig farm, the method is in conjunction with the feature of pig farm breeding wastewater, biological nitration and denitrifying method is mainly utilized to make a return journey the ammonia nitrogen in dewatering, be aided with breakpoint chlorination and do ultimate guarantee, make the qualified discharge of the ammonia nitrogen index long-term stability of water outlet.
The present invention for solving the problems of the technologies described above adopted technical scheme is: the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on a kind of pig farm, and it comprises the steps:
Step (1), Pig raising wastewater first through mechanical grille every removing large particulate matter, then enter solid-liquid separator and carry out solid-liquid separation, remove the small granular suspended matters in waste water, obtain waste water after slag.
Step (2), the waste water after slag enters after methane-generating pit carries out anaerobically fermenting, enters one-level anoxic pond, and mixes with the mixed solution from one-level Aerobic Pond, carry out anti-nitration reaction; Then, the water outlet of one-level anoxic pond enters one-level Aerobic Pond, and gives birth to the returned sluge in heavy pond with one-level, carries out nitration reaction; The raw heavy pond of one-level is entered finally by the water outlet of one-level Aerobic Pond.
Step (3), the waste water flowed out from the raw heavy pond of one-level enters secondary anoxic pond, and mixes with the mixed solution from secondary Aerobic Pond, carries out anti-nitration reaction; Then, the water outlet of secondary anoxic pond enters secondary Aerobic Pond, and gives birth to the returned sluge in heavy pond with secondary, carries out nitration reaction; The raw heavy pond of secondary is entered finally by the water outlet of secondary Aerobic Pond.
In above-mentioned steps (2) and step (3), the state modulator of one-level anoxic pond, secondary anoxic pond exists: BOD5/TN > 3 ~ 5, pH value is 7.0 ~ 7.5, and dissolved oxygen content is 0.3 ~ 0.5mg/L.The state modulator of one-level Aerobic Pond, secondary Aerobic Pond exists: dissolved oxygen content is 2 ~ 4mg/L.
The mixed-liquor return amount of one-level Aerobic Pond and secondary Aerobic Pond is 200% of wastewater treatment capacity, and the raw heavy pond of one-level and secondary raw heavy pond sludge reflux amount are 100% of wastewater treatment capacity.
Further, also gas blower can be set on one-level Aerobic Pond and secondary Aerobic Pond and carry out aeration, make to be in high-solubility oxygen state all the time in Aerobic Pond.
Along with the prolongation in reaction times, should suitable supplementary carbon source and add alkali in one-level anoxic pond and secondary anoxic pond.
Step (4), the water port place in the raw heavy pond of secondary is communicated to breakpoint chlorination pond, and preferably, on breakpoint chlorination pond, reserved chlorine bleach liquor, adds when ammonia nitrogen value exceeds standard, to ensure the thorough removal of ammonia nitrogen in waste water.
Principle of work of the present invention is: first, carries out physical sepn, obtain waste water after slag by mechanical grille, solid-liquid separator to the ammonia nitrogen in breeding wastewater; Then after anaerobically fermenting, under utilizing the effect of the nitrate nitrogen denitrifying bacteria in one-level anoxic pond in one-level Aerobic Pond backflow mixed liquor, in one-level anoxic pond, anti-nitration reaction is carried out using the carbonaceous organic material in raw waste water as carbon source, after water outlet after denitrification enters one-level Aerobic Pond, carbonaceous organic material is oxidized, itrogenous organic substance realizes the nitrification of ammonification and ammonia nitrogen, simultaneously at the N that one-level anoxic pond denitrification produces
2discharge through aeration stripping at one-level Aerobic Pond, the returned sluge that the raw heavy pond of one-level is discharged in addition can bring a large amount of nitrate and oxygen into, is beneficial to completing of nitration reaction.Then, after the mixed solution come by the raw heavy pond of one-level enters secondary anoxic pond, denitrifying bacteria utilizes the endogenous metabolism material in mixed solution to carry out denitrification further, the N that denitrification produces
2discharge through aeration stripping at secondary Aerobic Pond, improve the sedimentation function of mud inherence, the ammonia nitrogen that endogenous metabolism produces simultaneously also can obtain nitrated at secondary Aerobic Pond, and is discharged by the raw heavy pond of secondary, and its nitric efficiency can reach 90 ~ 95%.Finally in the water port in secondary raw heavy pond, breakpoint chlorination pond is set, once ammonia nitrogen value exceeds design load, by adding chlorine bleach liquor, to ensure the thorough removal of ammonia nitrogen in waste water.
The present invention has reliable and stable, and level of automation is high, and running cost is low, and labour intensity is little, the advantage that capacity of resisting impact load is strong, the guarantee ammonia nitrogen index qualified discharge of the long-term continous-stable of energy.
Illustrate and embodiment below in conjunction with accompanying drawing, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further expanded description; but it is to be noted; the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment:
As shown in Figure 1, the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on a kind of pig farm, and it comprises the steps:
Step (1), pig house discharge Pig raising wastewater first through mechanical grille every removing large particulate matter, flow into water collecting basin again, under lift pump drives, enter solid-liquid separator and carry out solid-liquid separation, to isolate in waste water the suspended substances such as most short grained excrement slag, to remove the ammonia nitrogen of part, and obtain waste water after slag.
Step (2), the waste water after slag enters after methane-generating pit carries out anaerobically fermenting, enters equalizing tank, then enters one-level anoxic pond, and mix with the mixed solution from one-level Aerobic Pond, carry out anti-nitration reaction.Then, the water outlet of one-level anoxic pond enters one-level Aerobic Pond, and gives birth to the returned sluge in heavy pond with one-level, carries out nitration reaction; Finally enter the raw heavy pond of one-level.
Step (3), the waste water flowed out from the raw heavy pond of one-level enters secondary anoxic pond, and mixes with the mixed solution from secondary Aerobic Pond, carries out anti-nitration reaction.Then, the water outlet of secondary anoxic pond enters secondary Aerobic Pond, and gives birth to the returned sluge in heavy pond with secondary, carries out nitration reaction.Finally enter the raw heavy pond of secondary.
In above-mentioned steps (2) and step (3), the state modulator of one-level anoxic pond, secondary anoxic pond exists: BOD
5/ TN > 3 ~ 5, pH value is 7.0 ~ 7.5, and dissolved oxygen content is 0.3 ~ 0.5mg/L.The state modulator of one-level Aerobic Pond, secondary Aerobic Pond exists: dissolved oxygen content is 2 ~ 4mg/L.The mixed-liquor return amount of one-level Aerobic Pond and secondary Aerobic Pond is 200% of wastewater treatment capacity, and the raw heavy pond of one-level and secondary raw heavy pond sludge reflux amount are 100% of wastewater treatment capacity.
One-level Aerobic Pond and secondary Aerobic Pond arrange gas blower and carries out aeration, make to be in high-solubility oxygen state all the time in Aerobic Pond.
Step (4), the water port place in the raw heavy pond of secondary is communicated to breakpoint chlorination pond, and preferably, on breakpoint chlorination pond, reserved chlorine bleach liquor, adds when ammonia nitrogen value exceeds standard, to ensure the thorough removal of ammonia nitrogen in waste water.
Claims (5)
1. a minimizing technology for high ammonia nitrogen in clear excrement breeding wastewater is done on pig farm, it is characterized in that, comprises the steps:
Step (1), Pig raising wastewater first through mechanical grille every removing large particulate matter, then enter solid-liquid separator and carry out solid-liquid separation, remove the small granular suspended matters in waste water, obtain waste water after slag;
Step (2), the waste water after slag enters after methane-generating pit carries out anaerobically fermenting, enters one-level anoxic pond, and mixes with the mixed solution from one-level Aerobic Pond, carry out anti-nitration reaction; Then, the water outlet of one-level anoxic pond enters one-level Aerobic Pond, and gives birth to the returned sluge in heavy pond with one-level, carries out nitration reaction; The raw heavy pond of one-level is entered finally by the water outlet of one-level Aerobic Pond;
Step (3), the waste water flowed out from the raw heavy pond of one-level enters secondary anoxic pond, and mixes with the mixed solution from secondary Aerobic Pond, carries out anti-nitration reaction; Then, the water outlet of secondary anoxic pond enters secondary Aerobic Pond, and gives birth to the returned sluge in heavy pond with secondary, carries out nitration reaction; The raw heavy pond of secondary is entered finally by the water outlet of secondary Aerobic Pond;
Step (4), the water port place in the raw heavy pond of secondary is communicated to breakpoint chlorination pond, adds, to ensure the thorough removal of ammonia nitrogen in waste water when ammonia nitrogen value exceeds standard.
2. the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on pig farm as claimed in claim 1, it is characterized in that: the BOD of one-level anoxic pond, secondary anoxic pond in described step (2) and step (3)
5/ TN > 3 ~ 5, pH value is 7.0 ~ 7.5, and dissolved oxygen content is 0.3 ~ 0.5mg/L.
3. the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on pig farm as claimed in claim 1, it is characterized in that: in described step (2) and step (3), the dissolved oxygen content of one-level Aerobic Pond, secondary Aerobic Pond is 2 ~ 4mg/L.
4. the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on pig farm as claimed in claim 1, it is characterized in that: the mixed-liquor return amount of described step (2) and the middle one-level Aerobic Pond of step (3) and secondary Aerobic Pond is 200% of wastewater treatment capacity, the raw heavy pond of one-level and secondary raw heavy pond sludge reflux amount are 100% of wastewater treatment capacity.
5. as described in any one of Claims 1-4, the minimizing technology of high ammonia nitrogen in clear excrement breeding wastewater is done on pig farm, it is characterized in that: described one-level Aerobic Pond and secondary Aerobic Pond are also respectively arranged with gas blower.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145546A (en) * | 2016-08-24 | 2016-11-23 | 广东水清环保科技有限公司 | The processing method of a kind of livestock breed aquatics waste water and system thereof |
| CN107265776A (en) * | 2017-08-02 | 2017-10-20 | 北京创迪环境科技有限公司 | A kind of culturing wastewater processing system and method |
| CN107285469A (en) * | 2017-08-15 | 2017-10-24 | 广东高龙环保科技有限公司 | A kind of monomer piggery waste method for treating water |
| CN107473524A (en) * | 2017-09-26 | 2017-12-15 | 江西沄沐环保科技有限公司 | A kind of high concentration organic acidity wastewater treatment system |
| CN108249696A (en) * | 2017-12-30 | 2018-07-06 | 珠海市斗门区永兴盛环保工业废弃物回收综合处理有限公司 | A kind of purifying treatment method of comprehensive wastewater |
| CN109912125A (en) * | 2019-03-25 | 2019-06-21 | 天津市郁峰化工有限公司 | A kind of method of sodium hypochlorite catalytic oxidation treatment ammonia nitrogen waste water |
| CN110713322A (en) * | 2019-11-13 | 2020-01-21 | 李洪腾 | Breeding and slaughtering wastewater treatment system and method |
| CN111439891A (en) * | 2020-04-15 | 2020-07-24 | 绍兴国鑫环保工程有限公司 | Industrial ammonia nitrogen removal process |
| CN112408724A (en) * | 2020-12-07 | 2021-02-26 | 深圳市浩天源环保科技有限公司 | Method and system for treating wastewater of farm |
| CN114262126A (en) * | 2021-12-28 | 2022-04-01 | 惠州市兴牧环保科技股份有限公司 | Pig house manure comprehensive treatment method and modified suspension filler |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145546A (en) * | 2016-08-24 | 2016-11-23 | 广东水清环保科技有限公司 | The processing method of a kind of livestock breed aquatics waste water and system thereof |
| CN107265776A (en) * | 2017-08-02 | 2017-10-20 | 北京创迪环境科技有限公司 | A kind of culturing wastewater processing system and method |
| CN107285469A (en) * | 2017-08-15 | 2017-10-24 | 广东高龙环保科技有限公司 | A kind of monomer piggery waste method for treating water |
| CN107473524A (en) * | 2017-09-26 | 2017-12-15 | 江西沄沐环保科技有限公司 | A kind of high concentration organic acidity wastewater treatment system |
| CN108249696A (en) * | 2017-12-30 | 2018-07-06 | 珠海市斗门区永兴盛环保工业废弃物回收综合处理有限公司 | A kind of purifying treatment method of comprehensive wastewater |
| CN109912125A (en) * | 2019-03-25 | 2019-06-21 | 天津市郁峰化工有限公司 | A kind of method of sodium hypochlorite catalytic oxidation treatment ammonia nitrogen waste water |
| CN110713322A (en) * | 2019-11-13 | 2020-01-21 | 李洪腾 | Breeding and slaughtering wastewater treatment system and method |
| CN111439891A (en) * | 2020-04-15 | 2020-07-24 | 绍兴国鑫环保工程有限公司 | Industrial ammonia nitrogen removal process |
| CN112408724A (en) * | 2020-12-07 | 2021-02-26 | 深圳市浩天源环保科技有限公司 | Method and system for treating wastewater of farm |
| CN114262126A (en) * | 2021-12-28 | 2022-04-01 | 惠州市兴牧环保科技股份有限公司 | Pig house manure comprehensive treatment method and modified suspension filler |
| CN114262126B (en) * | 2021-12-28 | 2022-12-02 | 惠州市兴牧环保科技股份有限公司 | Pig house manure comprehensive treatment method and modified suspension filler |
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Application publication date: 20160406 |