CN102515352A - Method for removing ammonia nitrogen from industrial waste water produced in synthetic ammonia industry - Google Patents
Method for removing ammonia nitrogen from industrial waste water produced in synthetic ammonia industry Download PDFInfo
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- CN102515352A CN102515352A CN2011104296523A CN201110429652A CN102515352A CN 102515352 A CN102515352 A CN 102515352A CN 2011104296523 A CN2011104296523 A CN 2011104296523A CN 201110429652 A CN201110429652 A CN 201110429652A CN 102515352 A CN102515352 A CN 102515352A
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Abstract
The invention discloses a method for removing ammonia nitrogen from industrial waste water produced in a synthetic ammonia industry. The method provided by the invention comprises the following steps that industrial waste water produced in a synthetic ammonia industry orderly enters into an anoxic pond, an anaerobic pond, a micro-oxygen pond, an aerobic pond and a sedimentation pond; a part of the industrial waste water in the micro-oxygen pond flows back to the anaerobic pond; a part of the industrial waste water in the aerobic pond flows back to the anoxic pond; and a part of the industrial waste water in the sedimentation pond flows back to a water inlet end of the anoxic pond. The method provided by the invention realizes anoxic denitrification, anaerobic ammoxidation and short-cut nitrification and denitrification in the same biological treatment system. The method provided by the invention realizes the short-cut nitrification and denitrification and thus saving an oxygen supply amount by 25% and an organic carbon source utilization amount by 40% and reducing reaction retention time and the capacity. The method provided by the invention realizes the anaerobic ammoxidation and thus reducing energy consumption and preventing secondary pollution. The method provided by the invention has a high ammonia nitrogen removal rate of above 99%. The method provided by the invention has a low alkali consumption amount in the whole flow and has a low operating cost.
Description
Technical field
The present invention relates to the removal methods of ammonia nitrogen in a kind of waste water, particularly the removal methods of ammonia nitrogen in the ammonia synthesizing industry waste water.
Background technology
Ammonia synthesizing industry produces in process of production and contains the ammonia nitrogen trade effluent in a large number, and the sector waste water has characteristics such as pollutant kind is many, biodegradability is poor, carbon-nitrogen ratio is low, ammonia-nitrogen content height.At present, the common employing biochemical method of ammonia synthesizing industry waste water is handled, and particularly adopting with the A/O denitrogenation is the biological denitrification process of representative.This technological principle is the ammonia nitrogen in the waste water, under aerobic condition by nitrifier nitrated be nitric nitrogen, a large amount of nitric nitrogens are back to the anoxic section; Under anoxia condition; Through the effect of amphimicrobian denitrifying bacteria, as electron donor, nitric nitrogen is as electron acceptor(EA) with organism in the waste water; Make nitric nitrogen be reduced to nitrogen, thereby escape into the purpose that atmosphere reaches final denitrogenation.The air blast air capacity that aerobic section needs in this technology is big, and power consumption is big, and needs additional alkali number big; The anoxic section need be replenished a large amount of organic carbon sources, and under the low condition of ammonia synthesizing industry waste water carbon-nitrogen ratio, denitrification rate is low, and additional organic carbon source amount is big, and process cost is high; This technology nitric efficiency is low, in order to improve denitrification percent, must improve reflux ratio, but high reflux ratio causes anoxic section oxygen enrichmentization, destroys the denitrification environment, has reduced the denitrification rate, has increased kinetic energy consumption simultaneously.
Summary of the invention
It is high to the purpose of this invention is to provide a kind of processing efficiency, ammonia nitrogen removal method in the ammonia synthesizing industry waste water that working cost is low, investment is little, and it can make the sector discharge of wastewater be up to state standards.
Technical scheme of the present invention comprises following content: ammonia nitrogen removal method in a kind of ammonia synthesizing industry waste water; Ammonia synthesizing industry waste water gets into anoxic pond, anaerobic pond, little oxygen pond, Aerobic Pond and settling tank successively; A part of sewage backflow is to anaerobic pond in little oxygen pond; A part of sewage backflow is to anoxic pond in the Aerobic Pond, and a part of sewage backflow in the settling tank is to the feed-water end of anoxic pond.
Said ammonia synthesizing industry waste water is introduced in the anoxic pond, and contains nitric nitrogen (NO
3 --N) backflow mixed liquor is mixed and to be carried out denitrification reaction, with organism in the waste water as electron donor, with nitric nitrogen (NO
3 --N) as electron acceptor(EA), NO
3 --N is reduced to nitrogen (N
2) remove; Waste water in the anoxic pond after the denitrogenation gets in the anaerobic pond, in anaerobic pond with contain nitrite nitrogen (NO
2 --N) recirculation water mixes and to carry out the Anammox reaction, with the ammonia nitrogen (NH in the waste water
4 +-N) do electron donor, with nitrite nitrogen (NO
2 --N) be electron acceptor(EA), with NH
4 +-N or NO
2 --N is transformed into N
2Contain NH in the anaerobic pond
4 +The waste water of-N gets in little oxygen pond, carries out nitrosation reaction, NH
4 +-N is oxidized to NO
2 --N contains NO in little oxygen pond simultaneously
2 -The sewage part of-N is back to anaerobic pond; The remaining NO that contains in little oxygen pond
2 -The waste water of-N gets in the Aerobic Pond, carries out nitration reaction, NO
2 -The oxidized formation of-N NO
3 --N contains NO in the Aerobic Pond
3 -The waste water part of-N is carried out denitrification denitrogenation through being back to anoxic pond, the remaining NO that contains in the Aerobic Pond
3 -The waste water of-N is qualified discharge after the settling tank mud-water separation, and precipitating sludge is back to anoxic pond.
Anti-nitration reaction in anoxic pond is at PH=7.5-9.2, and dissolved oxygen (DO) is less than carrying out under the 0.5mg/L condition; Anti-nitration reaction in anaerobic pond is at PH=7.0-8.5, and dissolved oxygen (DO) is less than carrying out under the 0.2mg/L condition; Anti-nitration reaction in little oxygen pond is at PH=7.4-8.3, and dissolved oxygen (DO) carries out under the 0.5-1.0mg/L condition; Anti-nitration reaction in Aerobic Pond is at PH=6.5-8.0, and dissolved oxygen (DO) carries out under the 2.0-4.0mg/L condition; Return current ratio of the mixed liquid is 100-300%; Hydraulic detention time is 7-14 hour in the anoxic pond; Hydraulic detention time is 9-12 hour in the anaerobic pond; Hydraulic detention time is 18-30 hour in little oxygen pond; Hydraulic detention time is 13-17 hour in the Aerobic Pond.
Benefit of the present invention is: anoxic denitrification, Anammox, short-cut nitrification and denitrification are realized in same biological treatment system.Realize short-cut nitrification and denitrification, the oxygen-supplying amount of saving 25% and 40% organic carbon source shorten reaction time, reduce volume; Realize Anammox, cut down the consumption of energy, prevent secondary pollution; Ammonia nitrogen removal frank is high, reaches more than 99%; The consumption of whole process alkali reduces, and working cost is low.
Adopting the present invention can be 400-800mg/L, NH4 with COD
+-N is that the ammonia nitrogen waste water of 150-450mg/L is reduced to COD less than 50mg/L, NH4
+-N is less than 5mg/L, and total nitrogen is lower than national grade one discharge standard less than 15mg/L.This technology has not only improved the nitric efficiency of traditional ammonia synthesizing industry waste water greatly, and has reduced working cost, has reduced floor space.
Description of drawings
Fig. 1 is an ammonia nitrogen removal method flow diagram in the ammonia synthesizing industry waste water.
Embodiment
Embodiment 1
Handle water yield 417m
3/ h, COD content is about 600mg/L in the ammonia synthesizing industry waste water, and ammonia-nitrogen content is about 350mg/L.Ammonia synthesizing industry waste water is introduced in the anoxic pond, and contains nitric nitrogen (NO
3 --N) recirculation water mixes and to carry out denitrification reaction, the denitrification denitrogenation bacterium with organism in the waste water as electron donor, with nitric nitrogen (NO
3 --N) as electron acceptor(EA), at PH=7.5-9.2, dissolved oxygen (DO) makes NO less than carrying out anti-nitration reaction under the 0.5mg/L condition
3 --N is reduced to nitrogen (N
2) remove, the anoxic pond hydraulic detention time is 12 hours; Waste water after the denitrogenation gets into anaerobic pond, in anaerobic pond with contain nitrite nitrogen (NO
2 --N) recirculation water mixes and to carry out the Anammox reaction, with the ammonia nitrogen (NH in the waste water
4 +-N) do electron donor, with nitrite nitrogen (NO
2 --N) be electron acceptor(EA), at PH=7.0-8.5, dissolved oxygen (DO) less than under the 0.2mg/L condition with NH
4 +-N or NO
2 --N is transformed into N
2, the anaerobic pond hydraulic detention time is 9 hours; Contain NH
4 +The waste water of-N gets into little oxygen pond, carries out nitrosation reaction, and at PH=7.4-8.3, dissolved oxygen (DO) is at the following NH of 0.5-1.0mg/L condition
4 +-N is oxidized to NO
2 --N contains NO simultaneously
2 -The sewage part of-N is back to anaerobic pond, and reflux ratio is 200%, and little oxygen tank waterpower residence time is 20 hours; The remaining NO that contains
2 -The waste water of-N gets into Aerobic Pond, and at PH=6.5-8.0, dissolved oxygen (DO) carries out nitration reaction, NO under the 2.0-4.0mg/L condition
2 -The oxidized formation of-N NO
3 --N contains NO
3 -The waste water part of-N is carried out denitrification denitrogenation through being back to anoxic pond, and reflux ratio is 300%, and the Aerobic Pond hydraulic detention time is 17 hours; Residue waste water gets into settling tank and carries out mud-water separation; Precipitating sludge is back to the anoxic pond feed-water end, and return sludge ratio is 80%, the treat effluent qualified discharge.The total hydraulic detention time of system is about 58 hours, and effluent quality COD is less than 50mg/L, NH4
+-N is less than 5mg/L, and total nitrogen is less than 15mg/L.
Embodiment 2
Handle water yield 210m
3/ h, COD content is about 450mg/L in the ammonia synthesizing industry waste water, and ammonia-nitrogen content is about 250mg/L.Ammonia synthesizing industry waste water is introduced in the anoxic pond, and contains nitric nitrogen (NO
3 --N) recirculation water mixes and to carry out denitrification reaction, the denitrification denitrogenation bacterium with organism in the waste water as electron donor, with nitric nitrogen (NO
3 --N) as electron acceptor(EA), at PH=7.5-9.2, dissolved oxygen (DO) makes NO less than carrying out anti-nitration reaction under the 0.5mg/L condition
3 --N is reduced to nitrogen (N
2) remove, the anoxic pond hydraulic detention time is 7 hours; Waste water after the denitrogenation gets into anaerobic pond, in anaerobic pond with contain nitrite nitrogen (NO
2 --N) recirculation water mixes and to carry out the Anammox reaction, with the ammonia nitrogen (NH in the waste water
4 +-N) do electron donor, with nitrite nitrogen (NO
2 --N) be electron acceptor(EA), at PH=7.0-8.5, dissolved oxygen (DO) less than under the 0.2mg/L condition with NH
4 +-N or NO
2 --N is transformed into N
2, the anaerobic pond hydraulic detention time is 9 hours; Contain NH
4 +The waste water of-N gets into little oxygen pond, carries out nitrosation reaction, and at PH=7.4-8.3, dissolved oxygen (DO) is at the following NH of 0.5-1.0mg/L condition
4 +-N is oxidized to NO
2 --N contains NO simultaneously
2 -The sewage part of-N is back to anaerobic pond, and reflux ratio is 150%, and little oxygen pond 3 hydraulic detention times are 25 hours; The remaining NO that contains
2 -The waste water of-N gets into Aerobic Pond, and at PH=6.5-8.0, dissolved oxygen (DO) carries out nitration reaction, NO under the 2.0-4.0mg/L condition
2 -The oxidized formation of-N NO
3 --N contains NO
3 -The waste water part of-N is carried out denitrification denitrogenation through being back to anoxic pond, and reflux ratio is 200%, and the Aerobic Pond hydraulic detention time is 13 hours; Residue waste water gets into settling tank and carries out mud-water separation; Precipitating sludge is back to the anoxic pond feed-water end, and return sludge ratio is 100%, the treat effluent qualified discharge.The total hydraulic detention time of system is about 54 hours, and effluent quality COD is less than 50mg/L, NH4
+-N is less than 5mg/L, and total nitrogen is less than 15mg/L.
Claims (8)
1. ammonia nitrogen removal method in the ammonia synthesizing industry waste water; It is characterized in that: ammonia synthesizing industry waste water gets into anoxic pond, anaerobic pond, little oxygen pond, Aerobic Pond and settling tank successively; A part of sewage backflow is to anaerobic pond in little oxygen pond; A part of sewage backflow is to anoxic pond in the Aerobic Pond, and a part of sewage backflow in the settling tank is to the feed-water end of anoxic pond.
2. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1; It is characterized in that: ammonia synthesizing industry waste water is introduced in the anoxic pond; Mix with the backflow mixed liquor that contains nitric nitrogen and to carry out denitrification reaction; As electron donor, as electron acceptor(EA), nitric nitrogen is reduced to nitrogen and removes with nitric nitrogen with organism in the waste water; Waste water in the anoxic pond after the denitrogenation gets in the anaerobic pond; In anaerobic pond, mix and carry out the Anammox reaction with the recirculation water that contains nitrite nitrogen; Ammonia nitrogen with in the waste water is done electron donor, is electron acceptor(EA) with the nitrite nitrogen, and ammonia nitrogen or nitrite nitrogen are transformed into nitrogen; The waste water that contains ammonia nitrogen in the anaerobic pond gets in little oxygen pond, carries out nitrosation reaction, is oxidized to nitrite nitrogen to ammonia nitrogen, and a sewage part that contains nitrite nitrogen simultaneously in little oxygen pond is back to anaerobic pond; The remaining waste water that contains nitrite nitrogen in little oxygen pond gets in the Aerobic Pond; Carry out nitration reaction; The oxidized formation nitric nitrogen of nitrite nitrogen; A waste water part that contains nitric nitrogen in the Aerobic Pond is carried out denitrification denitrogenation through being back to anoxic pond, the remaining waste water qualified discharge after the settling tank mud-water separation that contains nitric nitrogen in the Aerobic Pond, and precipitating sludge is back to anoxic pond.
3. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: the anti-nitration reaction in anoxic pond is at PH=7.5-9.2, and dissolved oxygen is less than carrying out under the 0.5mg/L condition.
4. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: the anti-nitration reaction in anaerobic pond is at PH=7.0-8.5, and dissolved oxygen is less than carrying out under the 0.2mg/L condition.
5. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: the anti-nitration reaction in little oxygen pond is at PH=7.4-8.3, and dissolved oxygen carries out under the 0.5-1.0mg/L condition.
6. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: the anti-nitration reaction in Aerobic Pond is at PH=6.5-8.0, and dissolved oxygen carries out under the 2.0-4.0mg/L condition.
7. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: the reflux ratio of said mixed solution is 100-300%.
8. ammonia nitrogen removal method in the ammonia synthesizing industry waste water according to claim 1 is characterized in that: hydraulic detention time is 7-14 hour in the anoxic pond; Hydraulic detention time is 9-12 hour in the anaerobic pond; Hydraulic detention time is 18-30 hour in little oxygen pond; Hydraulic detention time is 13-17 hour in the Aerobic Pond.
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|---|---|---|---|
| CN2011104296523A CN102515352A (en) | 2011-12-20 | 2011-12-20 | Method for removing ammonia nitrogen from industrial waste water produced in synthetic ammonia industry |
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|---|---|---|---|
| CN2011104296523A CN102515352A (en) | 2011-12-20 | 2011-12-20 | Method for removing ammonia nitrogen from industrial waste water produced in synthetic ammonia industry |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936237A (en) * | 2014-05-06 | 2014-07-23 | 哈尔滨工业大学 | Sewage treatment device based on cryptic growth and energy uncoupling metabolism combination and sewage treatment method thereof |
| CN104108834A (en) * | 2014-07-15 | 2014-10-22 | 中国人民大学 | Method for carrying out nitrogen and phosphorus removal on municipal sewage |
| CN105585122A (en) * | 2016-02-29 | 2016-05-18 | 湖州环境科技创新中心 | High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique |
| CN106186582A (en) * | 2016-08-31 | 2016-12-07 | 南京河海环境研究院有限公司 | The degraded of a kind of brewing wastewater high-enriched organics and the processing means of denitrogenation |
| CN109574224A (en) * | 2018-12-10 | 2019-04-05 | 中国科学院生态环境研究中心 | A kind of system and method for waste water of livestock poultry processing |
| CN110606565A (en) * | 2019-09-12 | 2019-12-24 | 广西博世科环保科技股份有限公司 | Inverted shortcut nitrification-anaerobic ammonia oxidation sewage treatment device and treatment method |
| CN111362407A (en) * | 2020-03-20 | 2020-07-03 | 中国城市建设研究院有限公司 | Denitrification device and method for synchronously realizing nitrification and denitrification and anaerobic ammonia oxidation |
| CN112028379A (en) * | 2019-08-02 | 2020-12-04 | 南京中鹏环保科技发展有限公司 | Sewage treatment process for effectively denitrifying by utilizing endogenous respiration |
-
2011
- 2011-12-20 CN CN2011104296523A patent/CN102515352A/en active Pending
Non-Patent Citations (1)
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| 高健磊等: "A2 / O2工艺处理氮肥废水的短程硝化反硝化", 《中国给水排水》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103936237A (en) * | 2014-05-06 | 2014-07-23 | 哈尔滨工业大学 | Sewage treatment device based on cryptic growth and energy uncoupling metabolism combination and sewage treatment method thereof |
| CN103936237B (en) * | 2014-05-06 | 2015-10-07 | 哈尔滨工业大学 | A kind of waste disposal plant based on recessive growth and energy uncoupling metabolism associating and the method for disposing of sewage thereof |
| CN104108834A (en) * | 2014-07-15 | 2014-10-22 | 中国人民大学 | Method for carrying out nitrogen and phosphorus removal on municipal sewage |
| CN104108834B (en) * | 2014-07-15 | 2016-01-13 | 中国人民大学 | A kind of method of municipal effluent being carried out to denitrogenation dephosphorizing |
| CN105585122A (en) * | 2016-02-29 | 2016-05-18 | 湖州环境科技创新中心 | High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique |
| CN105585122B (en) * | 2016-02-29 | 2018-07-24 | 湖州环境科技创新中心 | A kind of high-ammonia nitrogen low C/N is than waste water treatment system and treatment process |
| CN106186582A (en) * | 2016-08-31 | 2016-12-07 | 南京河海环境研究院有限公司 | The degraded of a kind of brewing wastewater high-enriched organics and the processing means of denitrogenation |
| CN109574224A (en) * | 2018-12-10 | 2019-04-05 | 中国科学院生态环境研究中心 | A kind of system and method for waste water of livestock poultry processing |
| CN109574224B (en) * | 2018-12-10 | 2024-02-13 | 中国科学院生态环境研究中心 | Livestock and poultry wastewater treatment system and method |
| CN112028379A (en) * | 2019-08-02 | 2020-12-04 | 南京中鹏环保科技发展有限公司 | Sewage treatment process for effectively denitrifying by utilizing endogenous respiration |
| CN110606565A (en) * | 2019-09-12 | 2019-12-24 | 广西博世科环保科技股份有限公司 | Inverted shortcut nitrification-anaerobic ammonia oxidation sewage treatment device and treatment method |
| CN111362407A (en) * | 2020-03-20 | 2020-07-03 | 中国城市建设研究院有限公司 | Denitrification device and method for synchronously realizing nitrification and denitrification and anaerobic ammonia oxidation |
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Application publication date: 20120627 |