CN101125725A - Technique for treating fertilizer waste water - Google Patents
Technique for treating fertilizer waste water Download PDFInfo
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- CN101125725A CN101125725A CNA2007101475169A CN200710147516A CN101125725A CN 101125725 A CN101125725 A CN 101125725A CN A2007101475169 A CNA2007101475169 A CN A2007101475169A CN 200710147516 A CN200710147516 A CN 200710147516A CN 101125725 A CN101125725 A CN 101125725A
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- waste water
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- baf
- ammonia nitrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A fertilizer waste water treatment technique is divided into the steps that: first waste water is injected to a regulation pool to balance waste water quality and water amount and comparatively large suspended matters in the waste water are removed primarily. Then the waste water goes to a coagulation pool; flocculant and coagulant aid are added and fully mixed through a mixer with comparatively small suspended matters and part of colloid in the waste water to form alum blossom. Next the waste water goes to a settling pool and alum blossom formed in the coagulation pool is removed from the sewage therein. After that, the waste water goes to a mixing pool to mix with return sludge and pH of waste water is adjusted to 8.0-10.0. Finally the waste water goes to an AF-BAF pool to remove ammonia nitrogen and COD. The multi-level AF-BAF pool hydraulic fluid status pertains to the status between a mixing fluid and a pushing fluid, which is beneficial to the diversity of organism and not only can carry out nitrification and denitrification reactions and improve ammonia nitrogen removal effect but also improves the general application of a organic matter removal method. The technique is suitable for the treatment of fertilizer waste water containing high ammonia and nitrogen and also can remove COD with a removal rate above 85 percent and ammonia nitrogen with a removal rate above 99 percent and is characterized by resistance to impact.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, especially relate to a kind of treatment process that is used for high ammonia nitrogen fertilizer waste water.
Background technology
In the wastewater processing technology, generally believe that for high ammonia nitrogen fertilizer waste water biochemical treatment is the most cost-effective technology.The prior biological denitride technology mainly contains AO method, A
2/ O method, CAST method etc., these several technologies all can be removed COD and ammonia nitrogen, but for high ammonia nitrogen and middle ammonia nitrogen chemical fertilizer denitrogenation of waste water poor effect.This is because treatment system mud long, nitrated speed limit in age, influent load restriction etc., and nitrated simultaneously and nitrococcus etc. are different for requirements such as nutrition, growth conditionss.Wherein characteristics such as the phase is long are widely different with other microbial populations slowly, from generation to generation for nitrobacteria growth, and the growth conditions, nutritive substance, N, carbon concentration etc. that dynamically control different types of microbial population are quite complicated, quite difficult.The denitrification treatment process oxidation of coal and the nitrated of ammonia nitrogen of extensively adopting separately carries out at present, promptly carry out the oxidation of carbon earlier, carry out nitrated again, because nitrifier and nitrococcus can not be survived under the situation that organism exists, and nitrifier and nitrococcus are vulnerable to the inhibition of temperature, pH value, ammonia nitrogen concentration etc.Ammonia nitrogen concentration will produce inhibition to nitrifying process above 50mg/L in waste water, cause for high ammonia nitrogen and middle ammonia nitrogen chemical fertilizer water treatment effect undesirable.
Chinese patent CN 1410366A adopts the BICT biological denitrification phosphorous removal technique, and the shortcoming of this patent is the operational management complexity, and power consumption is bigger, and technical process is long, and floor space is big.Chinese patent CN1220972A adopts the two-stage denitrification---and aerobic section is handled, and return sludge ratio is bigger, and ammonia nitrogen removal frank is not high, and nitrification and denitrification separately carries out, and the nitration reaction condition is wayward.Chinese patent CN1401592A adopts double-deck BAF to remove COD and ammonia nitrogen synchronously, and the shortcoming of this patent is that the filter tank needs back flushing, influences nitrobacteria growth and life-time service stops up easily.
At present, prior art does not all reach more than 99% the treatment effect of this type of waste water.Conventional denitrification process return sludge ratio height, power consumption is bigger, and floor space is big, invests higher and not high for the impact resistance of water quality and quantity.
Summary of the invention
In order to overcome above-mentioned shortcoming, realize decarburization and nitrated synchronously, avoid filter back washing to influence nitrobacteria growth, the present invention adopts following technical matters:
1. high ammonia nitrogen fertilizer waste water was stopped 4-6 hour in the equalizing tank of rectangular sedimentation tank structure,, and tentatively remove suspended substance bigger in the waste water with balanced water quality and quantity;
2. the waste water after the balanced water quality enters coagulation basin, stop 15～30min, and add flocculation agent and coagulant aids PAM and PAC, flocculant dosage 200-350ppm, under the agitator effect with sewage in less suspended substance and part colloid thorough mixing form alumen ustum;
3. waste water enters inclined-plate clarifying basin after the flocculation reaction of above process, and the surface load of settling tank adopts 1.0-2.0m
3/ m
2H, the alumen ustum that coagulation basin is formed is able to separate from sewage;
4. enter mixing pit through the coagulating sedimentation processed waste water, mix, and add NaCO with returned sluge
3Regulate waste water ph to 8.0～10.0;
5. waste water enters the AF-BAF pond after regulating the pH value, and this pond is looked water quality condition and is divided into the 3-7 level, and waste water is removed ammonia nitrogen and COD in the waste water successively by the AF-BAF pond.
The AF-BAF pond is made up of pump sump and multistage AF-BAF pond; The top of described pump sump 4 is provided with distributing trough 2, and this distributing trough 2 is equipped with water inlet pipe 4, the bottom has water distributing pore 3; The bottom of pump sump 4 links to each other with the AF-BAF pond, and the biologic packing material bed is equipped with in this AF-BAF pond, and aerating pipelines 7 is laid in the below of biologic packing material bed, and the bottom of BAF is provided with shore pipe 6; Connected by connecting hole 9 between the AF-BAF pond, in the end water collecting dike 11, braiding channel 12 and water shoot 13 are equipped with in the top of one-level BAF a6.
The AF-BAF pond is generally the 3-7 level, and the first step is AF (Anaerobic Filter) pond, and the back is BAF (Biological Aeration Filter) pond; The biologic packing material bed is equipped with in this AF-BAF pond, and the biologic packing material bed is made up of framework and filler, and bed of packings directly is fixed on the housing by framework.The outside surface of biologic packing material bed is the filter that is wrapped on the fixed frame, and the inside of bed of packings is separated into a plurality of space cells by the filter that is fixed on the polyethylene twine braiding on the framework, and each space cell is filled the active bio filler.So both guaranteed that filler was in suspended state, be difficult for stops up, flow resistance is little, avoided back flushing; Guaranteed that again filler is fixed in the space cell, filler is difficult for being broken up loss by current.Aerated conduit is not established in the AF pond, and aerating pipelines is established in the BAF pond below the biologic packing material bed, and shore pipe is established in the bottom.Waste water at first enters one-level AF pond from the bottom, up-flow fully contacts with the active bio filler, and the top overflow enters the BAF pond in the AF pond, falls stream and fully contacts with the active bio filler.Subsequent stages is same, the secondary of drainage flow successively.
The height of each reaction zone biologic packing material bed of AF-BAF pond generally is not less than 3 meters, and the active bio filler is a carrier with the high-performance filler, and the active bio filler has holes irregular and that diameter is different, helps living away from home and breeding of different microorganisms group; Select efficient engineering flora for use, engineering bacteria resides on the carrier, has improved biological charge capacity like this, the impact resistance of the water yield of increasing water quality.This structure makes that carrier inside exists good anaerobic zone microenvironment in the operational process, make the numerous miniature denitrification reactor of its inner formation, so cause ammonia oxidation, nitrification and denitrification combined action take place simultaneously in the middle of same reactor, the removal efficient of ammonia nitrogen is reached more than 99.0%; Simultaneously,, cause the existence of macroscopical anaerobism and aerobic environment, help releasing phosphorus and excessively taking the photograph phosphorus of polyP bacteria, guaranteed the removal of phosphorus by controlling the operating parameter of AF-BAF reactors at different levels.The biomass that surfaces of carrier materials is grown is generally 18-25g/L, is 1.5-2.0 times of common biomembrance process, be 10-20 times of traditional activated sludge process, and the filler difficult drop-off runs off.
Waste water is successively by the reaction of high order district, and the waterpower fluidised form belongs between mixed flow and the plug-flow, helps keeping diversity of organism, and aerobic, anerobe and amphimicrobe are existed simultaneously, and nitrification and denitrification carries out simultaneously, thereby reaches the purpose of denitrogenation.Diversity of organism not only can carry out the nitrification and denitrification reaction, improve the removal effect of ammonia nitrogen, and has improved and removed organic broad spectrum.
Adopt the present invention to handle fertilizer waste water, speed of response is fast, the residence time is short, treatment effect is reliable.For high ammonia nitrogen chemical fertilizer waste water COD clearance can reach more than 85%, ammonia nitrogen removal frank reaches more than 99% and this technology changes the water quality and quantity of waste water and has higher tolerance and impact resistance.
Description of drawings
Fig. 1 is the chemical fertilizer waste water treatment process schematic flow sheet.
Fig. 2 is the structural representation in AF-BAF pond.
Embodiment
Further specify the specific embodiment of the present invention below in conjunction with accompanying drawing, protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Get certain fertilizer plant's fertilizer waste water (CODcr=700mg/L, SS=400mg/L, NH
3-N=500mg/L, PH:8～9) experimentize.High ammonia nitrogen fertilizer waste water was stopped 4 hours in equalizing tank (adopting the rectangular sedimentation tank structure),, and tentatively remove suspended substance bigger in the waste water with balanced water quality and quantity; Waste water after the balanced water quality enters coagulation basin, stops 20min, and adds flocculation agent and coagulant aids PAM and PAC, and flocculant concentration is than 300ppm/ ton water, under the agitator effect with sewage in less suspended substance and part colloid thorough mixing form alumen ustum; Enter settling tank through after the flocculation reaction, the surface load of inclined-plate clarifying basin adopts 1.5m
3/ m
2H, the temperature of waste water is 28 ℃, and the pH value is 7-8, and the alumen ustum that coagulation basin is formed is able to separate from sewage; Enter mixing pit through the coagulating sedimentation processed waste water, mix, and add alkali (NaCO with returned sluge
3) regulate wastewater pH to 9.0, temperature is 28 ℃; Regulate pH value back waste water and enter the AF-BAF pond.This pond is divided into 6 grades, and the first step is the AF pond, and the back Pyatyi is the BAF pond.Waste water is successively by 6 grades of AF-BAF ponds.The temperature of AF-BAF pond waste water is 28 ℃, and gas-water ratio is 6: 1, and the BOD volumetric loading is 4.5kg/m3d, and the volumetric loading of ammonia nitrogen is 0.5kg/m3d.Through after the above art breading, CODcr reduces to 100mg/L, SS=10mg/L, NH
3-N=5mg/L, PH:8～9, the stable national grade one discharge standard that reaches.
Embodiment 2
Get certain fertilizer plant's fertilizer waste water (CODcr=500mg/L, SS=200mg/L, NH
3-N=500mg/L, PH:8～10) experimentize.High ammonia nitrogen fertilizer waste water was stopped 4 hours in equalizing tank (adopting the rectangular sedimentation tank structure),, and tentatively remove suspended substance bigger in the waste water with balanced water quality and quantity; Waste water after the balanced water quality enters coagulation basin, stops 20min, and adds flocculation agent and coagulant aids PAM and PAC, and flocculant concentration is than 300ppm/ ton water, under the agitator effect with sewage in less suspended substance and part colloid thorough mixing form alumen ustum; Enter settling tank through after the flocculation reaction, the surface load of inclined-plate clarifying basin adopts 1.5m
3/ m
2H, the temperature of waste water is 28 ℃, and the pH value is 8-9, and the alumen ustum that coagulation basin is formed is able to separate from sewage; Enter mixing pit through the coagulating sedimentation processed waste water, mix, and add alkali (NaCO with returned sluge
3) regulate wastewater pH to 10.0, temperature is 28 ℃; Regulate pH value back waste water and enter the AF-BAF pond.This pond is divided into 6 grades, and the first step is the AF pond, and the back Pyatyi is the BAF pond.Waste water is successively by 6 grades of AF-BAF ponds.The temperature of AF-BAF pond waste water is 28 ℃, and gas-water ratio is 6: 1, and the BOD volumetric loading is 4.5kg/m3d, and the volumetric loading of ammonia nitrogen is 0.5kg/m3d.Through after the above art breading, the stable national grade one discharge standard that reaches.
Show influent quality and go out water quality standard
| Project | CODcr | NH 3-N | SS | Oil | pH |
| Influent quality | 500mg/L | 500mg/L | 200mg/L | 10mg/L | 8-10 |
| Go out water quality standard | 100mg/L | 6mg/L | 10mg/L | 5mg/L | 7-9 |
Claims (2)
1. the treatment process of a high ammonia nitrogen fertilizer waste water may further comprise the steps:
A. high ammonia nitrogen fertilizer waste water was stopped 4-6 hour in the equalizing tank of rectangular sedimentation tank structure,, and tentatively remove suspended substance bigger in the waste water with balanced water quality and quantity;
B. the waste water after the balanced water quality enters coagulation basin, stop 15～30min, and add flocculation agent and coagulant aids PAM and PAC, flocculant dosage 200-350ppm, under the agitator effect with sewage in less suspended substance and part colloid thorough mixing form alumen ustum;
C. waste water enters inclined-plate clarifying basin after the flocculation reaction of above process, and the surface load of settling tank adopts 1.0-2.0m
3/ m
2H, the alumen ustum that coagulation basin is formed is able to separate from sewage;
D. enter mixing pit through the coagulating sedimentation processed waste water, mix, and add NaCO with returned sluge
3Regulate waste water ph to 8.0～10.0;
E. waste water enters the AF-BAF pond after regulating the pH value, and this pond is looked water quality condition and is divided into the 3-7 level, and waste water is removed ammonia nitrogen and COD in the waste water successively by the AF-BAF pond.
2. high ammonia nitrogen chemical fertilizer waste water treatment process according to claim 1 is characterized in that the AF-BAF pond first step is AF (Anaerobic Filter) pond, and the back is BAF (Biological Aeration Filter) pond; The biologic packing material bed is equipped with in this AF-BAF pond, the outside surface of biologic packing material bed is the filter that is wrapped on the biologic packing material fixed frame [5], the inside of bed of packings is separated into a plurality of space cells by the filter that is fixed on the biologic packing material fixed frame, and each space cell is filled the active bio filler; Aerated conduit is not established in the AF pond, and aerating pipelines is established in the BAF pond below the biologic packing material bed, and shore pipe is established in the bottom; Waste water at first enters one-level AF pond from the bottom, up-flow fully contacts with the active bio filler, and the item overflow enters the BAF pond in the AF pond, falls stream and fully contacts with the active bio filler, and subsequent stages is same, the secondary of drainage flow successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101475169A CN100534933C (en) | 2007-08-24 | 2007-08-24 | Technique for treating fertilizer waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101475169A CN100534933C (en) | 2007-08-24 | 2007-08-24 | Technique for treating fertilizer waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101125725A true CN101125725A (en) | 2008-02-20 |
| CN100534933C CN100534933C (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101475169A Expired - Fee Related CN100534933C (en) | 2007-08-24 | 2007-08-24 | Technique for treating fertilizer waste water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913730A (en) * | 2010-07-27 | 2010-12-15 | 北京特兰斯福生态环境科技发展有限公司 | Artificial wetland sewage treatment method and system |
| CN102616994A (en) * | 2012-03-30 | 2012-08-01 | 上海奥迪菲环境工程有限公司 | Sludge-first and then-water sewage (wastewater) quick treatment process |
| CN103086539A (en) * | 2013-01-21 | 2013-05-08 | 北京市环境保护科学研究院 | Solid-liquid separating device and method of concentrated liquid waste from banknote printing wiping |
| CN103212301A (en) * | 2013-04-28 | 2013-07-24 | 哈尔滨工业大学 | Ultrafiltration membrane pool with secondary on-line coagulation function |
| CN107265778A (en) * | 2017-08-02 | 2017-10-20 | 浙江西地环境科技有限公司 | Box hi-effect coagulation denitrification equipment |
-
2007
- 2007-08-24 CN CNB2007101475169A patent/CN100534933C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913730A (en) * | 2010-07-27 | 2010-12-15 | 北京特兰斯福生态环境科技发展有限公司 | Artificial wetland sewage treatment method and system |
| CN102616994A (en) * | 2012-03-30 | 2012-08-01 | 上海奥迪菲环境工程有限公司 | Sludge-first and then-water sewage (wastewater) quick treatment process |
| CN103086539A (en) * | 2013-01-21 | 2013-05-08 | 北京市环境保护科学研究院 | Solid-liquid separating device and method of concentrated liquid waste from banknote printing wiping |
| CN103212301A (en) * | 2013-04-28 | 2013-07-24 | 哈尔滨工业大学 | Ultrafiltration membrane pool with secondary on-line coagulation function |
| CN103212301B (en) * | 2013-04-28 | 2015-01-21 | 哈尔滨工业大学 | Ultrafiltration membrane pool with secondary on-line coagulation function |
| CN107265778A (en) * | 2017-08-02 | 2017-10-20 | 浙江西地环境科技有限公司 | Box hi-effect coagulation denitrification equipment |
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| Publication number | Publication date |
|---|---|
| CN100534933C (en) | 2009-09-02 |
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Granted publication date: 20090902 Termination date: 20120824 |