CN105293838B - A kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method - Google Patents
A kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method Download PDFInfo
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- CN105293838B CN105293838B CN201510845253.3A CN201510845253A CN105293838B CN 105293838 B CN105293838 B CN 105293838B CN 201510845253 A CN201510845253 A CN 201510845253A CN 105293838 B CN105293838 B CN 105293838B
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Abstract
The invention discloses a kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method.The first step uses nitrosation reactor, is nitrite nitrogen by part mineralized nitrogen in waste water；Second step is using anaerobic baffled reactor as core, successively in leading portion compartment culture nitrous acid salt form denitrifying bacterium, removes most of organic carbon source, suppression of the reduction organic carbon source to anaerobic ammonia oxidizing bacteria；Anaerobic ammonia oxidizing bacteria is cultivated in stage casing, ammonia nitrogen and nitrite nitrogen is significantly removed in proportion, and generate a small amount of nitrate nitrogen；Back segment culture nitric acid salt form denitrifying bacterium, removes nitrate nitrogen using remaining a small amount of carbon source, the staged reaction system of " nitrous acid salt form denitrification --- Anammox --- nitric acid salt form denitrification " is built successively in each compartment of anaerobic baffled reactor.This method has technique simple, anaerobic ammonia oxidizing bacteria and denitrifying bacterium is ensured in different compartments' differentiation growth, to the advantage of carbon nitrogen treatment effect stability and high efficiency.
Description
Technical field
The present invention relates to a kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method, belong to environmental technology field.
Background technology
At present, China's water pollution problems is serious, although carry forward vigorously carbon nitrogen phosphorus during Eleventh Five-Year Plan and " 12 "
The problem of removing, but still have very big for the processing of low-carbon-source waste water.Traditional biological denitrogenation method passes through nitrification-denitrification
Process realizes the removal of nitrogen, in the process, and sufficient carbon source is the key of denitrification efficient denitrification.In theory, 1g NO3--N
Denitrification need to consume 3.7g COD, therefore C/N is less than 3.7, and denitrification process can influence denitrification effect because carbon source is not enough.However,
Waste water quality is increasingly sophisticated, particularly the shortage of organic carbon source, causes part low ratio of carbon to ammonium waste water such as percolate, livestock and poultry to be supported
The industry anaerobism such as waste water and city domestic sewage anaerobic digestion solution, sludge fermentation supernatant, and starch, monosodium glutamate, wine brewing are grown to go out
The advanced nitrogen of water faces huge challenge.
Anammox technology is the technology for low-carbon-source wastewater treatment developed rapidly in recent years.Anammox is anti-
It should refer under anaerobic, anaerobic ammonia oxidizing bacteria is using nitrite nitrogen as electron acceptor, and oxidation ammonia nitrogen is the process of nitrogen, the mistake
Cheng Buxu organic carbon sources, belong to autotrophy process.However, the anaerobic ammonia oxidizing bacteria growth rate of autotrophic type is low, the doubling time is long, pole
It is vulnerable to the suppression of organic matter in actual waste water, it is considered that organic carbon will be serious to anaerobic ammonia oxidizing bacteria more than 100mg/L
Suppress.Moreover, anaerobic ammonium oxidation process only removes 90% nitrogen existed with ammonia and nitrite form, while producing about 10%
Nitrate nitrogen, and to useless Organic substance in water, almost no any removal is acted on whole process.Therefore, under normal circumstances using single
Anammox reaction had both been difficult to the nitrogen in removing actual waste water completely, also the organic carbon source in waste water can not be carried out effective
Remove.
In the recent period studies have found that, anaerobic ammonia oxidizing bacteria and denitrifying bacterium can be coexisted in same reactor, content of organics
Relative deficiency can avoid the amount reproduction of denitrifying bacterium, and both form certain synergy.But, it is excessive in waste water to have
Machine carbon source is present suppresses the growth and breeding of anaerobic ammonia oxidizing bacteria by great, and denitrifying bacterium is quickly occupied advantage.Therefore,
The denitrifying system that coexists of Anammox is still very fragile, how to a certain extent by anaerobic ammonia oxidizing bacteria and denitrifying bacterium
Split-phase culture, differentiation environmental condition is provided coexisting to react for both main bodys in system, and both simultaneous denitrifications of reinforcing have except carbon
It is significant.
The content of the invention
It is synchronously de- it is an object of the invention to provide a kind of low-carbon-source waste water for the above-mentioned problems in the prior art
Nitrogen carbon removal treatment method, has ensured anaerobic ammonia oxidizing bacteria and denitrifying bacterium in different compartments' differentiation growth, and to the processing of carbon nitrogen
Effect stability is efficient, to solve the not enough caused problems of prior art.
In order to solve the above problems, the technical solution adopted in the present invention is as follows：
A kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method, comprises the following steps：
（1）Nitrosation process：By low ratio of carbon to ammonium waste water by nitrosation reactor, it is Asia to make a certain proportion of mineralized nitrogen
Nitrate nitrogen；
（2）Nitrous acid salt form denitrification process：The step（1）Middle waste water outflow nitrosation reactor simultaneously enters anaerobism folding
Plate reactor is flowed, in anaerobic baffled reactor leading portion compartment culture nitrous acid salt form denitrifying bacterium, most of organic carbon is removed
Source and a part of nitrite nitrogen, suppression of the reduction organic carbon source to anaerobic ammonia oxidizing bacteria；
（3）Anaerobic ammonium oxidation process：The step（2）Middle anaerobic baffled reactor stage casing compartment culture Anammox
Bacterium, significantly removes ammonia nitrogen and nitrite nitrogen, and generate a small amount of nitrate nitrogen in proportion；
（4）Nitric acid salt form denitrification process：The step（2）Middle anaerobic baffled reactor back segment compartment culture nitrate
Type denitrifying bacterium, nitrate nitrogen is removed using remaining a small amount of organic carbon source.
Preferably, step（1）Described in nitrosation reactor in, mineralized nitrogen be nitrite nitrogen accounting be 60%~
70%。
Preferably, step（2）Middle anaerobic baffled reactor leading portion removes 70~80% organic carbon source and 20~30%
Nitrite nitrogen, and cause the waste water nitrite nitrogen and ammonia nitrogen ratio that enter anaerobic baffled reactor stage casing to be (1.2~1.3)：
1。
Preferably, step（3）Middle anaerobic baffled reactor stage casing anaerobic ammonium oxidation process nitrite nitrogen removal amount：Ammonia nitrogen
Removal amount：Nitrate nitrogen growing amount ratio is (1.2~1.3)：1：(0.2~0.3).
Preferably, step（4）Middle anaerobic baffled reactor back segment water inlet organic carbon source and nitrate nitrogen ratio (2~3)：1.
Preferably, the C/N ratios of the low-carbon-source waste water are less than 1.
A kind of advantage of low-carbon-source waste water simultaneous denitrification carbon removal treatment method of the present invention is：
1st, technique is simple, is directed to excitation and suppression of the organic carbon source respectively to denitrifying bacterium and anaerobic ammonia oxidizing bacteria, makes
Anaerobic ammonia oxidizing bacteria and denitrifying bacterium are in order in different compartments' differentiation growth；
2nd, nitrous acid salt form denitrifying bacterium is set by anaerobic baffled reactor leading portion, removes most of organic matter, keep away
Exempt from suppression of the organic matter to anaerobic ammonia oxidizing bacteria；
3rd, to the advantage of carbon nitrogen treatment effect stability and high efficiency, carbon nitrogen simultaneous removing rate is up to more than 95%.
Brief description of the drawings
If Fig. 1 is a kind of flow chart of low-carbon-source waste water simultaneous denitrification carbon removal treatment method of the present invention.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment：
A kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method, comprises the following steps：
（1）Take low-carbon-source waste water and pass through nitrosation reactor, its influent COD concentration is 150mg/L, total nitrogen is
170mg/L, C/N ratio are less than 1, and effluent COD concentration is 110mg/L, nitrite nitrogen 110mg/L, ammonia nitrogen 60mg/L.
（2）Waste water enters anaerobic baffled reactor, anaerobic baffled reactor leading portion hair by nitrosation reactor water outlet
Raw nitrous acid salt form denitrification process, water outlet COD is 20mg/L, nitrite nitrogen 70 mg/L, ammonia nitrogen 60mg/L；
（3）Anaerobic baffled reactor leading portion wastewater effluent enters stage casing compartment and occurs anaerobic ammonium oxidation process, water outlet COD
For 20mg/L, nitrite nitrogen and ammonia nitrogen are synchronously removed, and water outlet nitrite nitrogen is less than 1mg/L, and ammonia nitrogen 1-5mg/L, nitrate nitrogen is 15
mg/L；
（4）The water outlet of anaerobic baffled reactor middle-stage wastewater enters back segment compartment and occurs nitric acid salt form denitrification process, instead
Device final outflow water COD concentration about 7-8mg/L is answered, ammonia nitrogen 1-5mg/L, nitrite nitrogen and nitrate nitrogen are not detected substantially.
Based on above-mentioned, solution process of the present invention is simple, first passes through nitrosation reactor and converts most ammonia-nitrogen
For nitrite nitrogen；Excitation and suppression of the organic carbon source respectively to denitrifying bacterium and anaerobic ammonia oxidizing bacteria are directed to, makes waste water by Asia
Nitrator makes in anaerobic baffled reactor anaerobic ammonia oxidizing bacteria and denitrifying bacterium by anaerobic baffled reactor
In certain sequence in different compartments' differentiation growth；Nitrous acid salt form denitrification is set by anaerobic baffled reactor leading portion
Bacterium, removes most of organic carbon source, it is to avoid suppression of the organic carbon source to anaerobic ammonia oxidizing bacteria；Stage casing compartment sets Anammox
Bacterium, by nitrite nitrogen removing synchronous with ammonia nitrogen, and generates a small amount of nitrate nitrogen；Back segment compartment sets nitric acid salt form denitrifying bacterium, profit
Nitrate nitrogen is removed with remaining organic carbon source so that final nitrite nitrogen and the basic noresidue of nitrate nitrogen, it is steady to carbon nitrogen treatment effect
Fixed efficient advantage, carbon nitrogen simultaneous removing rate is up to more than 95%.
As known by the technical knowledge, the present invention can be by the embodiment party of other essence or essential feature without departing from its spirit
Case is realized.Therefore, embodiment disclosed above, for each side, is all merely illustrative, and is not only.Institute
Have within the scope of the present invention or included in the change being equal in the scope of the present invention by the present invention.
Claims (6)
1. a kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method, it is characterised in that comprise the following steps：
（1）Nitrosation process：By low ratio of carbon to ammonium waste water by nitrosation reactor, it is nitrous state to make a certain proportion of mineralized nitrogen
Nitrogen；
（2）Nitrous acid salt form denitrification process：The step（1）Middle waste water outflow nitrosation reactor simultaneously enters anaerobic baffle plate
Reactor, in anaerobic baffled reactor leading portion compartment culture nitrous acid salt form denitrifying bacterium, remove most of organic carbon source and
A part of nitrite nitrogen, suppression of the reduction organic carbon source to anaerobic ammonia oxidizing bacteria；
（3）Anaerobic ammonium oxidation process：The step（2）Middle anaerobic baffled reactor stage casing compartment culture anaerobic ammonia oxidizing bacteria,
Ammonia nitrogen and nitrite nitrogen are significantly removed in proportion, and generate a small amount of nitrate nitrogen；
（4）Nitric acid salt form denitrification process：The step（2）Middle anaerobic baffled reactor back segment compartment culture nitric acid salt form is anti-
Nitrifier, nitrate nitrogen is removed using remaining a small amount of organic carbon source.
2. a kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method according to claim 1, it is characterised in that：Step
（1）Described in nitrosation reactor in, mineralized nitrogen is that the accounting of nitrite nitrogen is 60%~70%.
3. a kind of low-carbon-source waste water simultaneous denitrification carbon removal treatment method according to claim 1, it is characterised in that：Step
（2）Middle anaerobic baffled reactor leading portion removes 70~80% organic carbon source and 20~30% nitrite nitrogen, and to enter
The waste water nitrite nitrogen and ammonia nitrogen ratio in anaerobic baffled reactor stage casing are (1.2~1.3)：1.
4. a kind of method of low-carbon-source waste water simultaneous denitrification carbon removal treatment according to claim 1, it is characterised in that：Step
（3）Middle anaerobic baffled reactor stage casing anaerobic ammonium oxidation process nitrite nitrogen removal amount：Ammonia nitrogen removal amount：Nitrate nitrogen growing amount
Ratio is (1.2~1.3)：1：(0.2~0.3).
5. a kind of method of low-carbon-source waste water simultaneous denitrification carbon removal treatment according to claim 1, it is characterised in that：Step
（4）Middle anaerobic baffled reactor back segment water inlet organic carbon source and nitrate nitrogen ratio (2~3)：1.
6. a kind of method of low-carbon-source waste water simultaneous denitrification carbon removal treatment according to claim 1, it is characterised in that：It is described
The C/N ratios of low-carbon-source waste water are less than 1.
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| CN115594288A (en) * | 2022-09-19 | 2023-01-13 | 北京工业大学（Cn） | Method for realizing synchronous treatment of domestic sewage and nitrate wastewater by SPNAED integrated MBBR by adding hydroxylamine |
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| CN202072583U (en) * | 2011-03-09 | 2011-12-14 | 桂林理工大学 | Nitrogenous wastewater treatment device |
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| CN104710007B (en) * | 2015-03-16 | 2016-06-01 | 北京工业大学 | A kind of realize synchronous nitrosation-anaerobic ammoxidation and the method for denitrification process steady running |
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