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Aerobic initiating method of anaerobic ammoxidation reactor

An anaerobic ammonia oxidation and reactor technology, applied in the field of environmental protection, can solve the problems of long start-up time, slow microbial proliferation, increased start-up time, etc., and achieve the effects of simple operation, simple operation and short start-up period.

Inactive Publication Date: 2005-11-02
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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Problems solved by technology

Anaerobic startup is adopted, and the rate of anaerobic biological reaction is low, so that the microorganisms in the reactor proliferate slowly and the startup time is longer
[0007] (2) Seed mud needs a lot
[0008] (3) Since there is no nitrite nitrogen in the reactor, the anammox bacteria need to be domesticated after the anaerobic bacteria are cultivated, and the start-up time increases

Method used

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  • Aerobic initiating method of anaerobic ammoxidation reactor

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Embodiment 1

[0035] See figure 1 .

[0036] A fixed-bed biofilm reactor installed with elastic fillers is used. Under the conditions of reaction temperature: 25-30°C and dissolved oxygen DO: 1.5-2.0mg / L, the aerobic activated sludge used to treat domestic sewage is used as the bacterial species. Containing 70~100mg / l NH 4 -N inorganic synthetic wastewater and domestic sewage were alternately aerobic cultured, and after about one and a half months, the reaction device was fed with NH 4 The nitrification rate of -N can reach 95%, which indicates that the nitrification biofilm is successfully formed in the reaction device, the aeration is stopped, and the anammox reaction is started. In the anaerobic ammonium oxidation reaction stage, the reaction temperature is 29°C, the influent NH 4 -N concentration: 120.7mg / L, NO 2 -N concentration 130.9mg / L, effluent NH 4 -N concentration: 20.17mg / L, removal rate 83.3%, NO 2 The concentration of -N is 10.32mg / L, and the removal rate is 92.11%.

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Abstract

The present invention relates to environment protecting technology, and is especially the starting method of biological denitrogenation reactor. The present invention provides one kind of fast and efficient method of starting anaerobic ammoxidation reactor and culturing microbe, i. e., aerobic starting. In the continuous culture mode, fixed bed biological membrane reactor as culture device, aerobic active sludge as bacteria seed, ammonia nitrogen waste water as culture liquid are adopted to culture biomembrane in aerobic condition. The culture process is controlled in the nitrifying stage, and after the nitrifying activity of the microbial system is strengthened gradually, nitrifying bacteria in the biomembrane are enriched and the nitrifying biomembrane is aerobically cultured, aeration is stopped before starting anaerobic ammoxidation.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and relates to a start-up method of a new wastewater denitrification process reaction device. Background technique [0002] Anaerobic ammonia oxidation (Anammox) is a new type of biological denitrification technology, which is characterized by the use of NH under anaerobic conditions 4 -N acts as an electron donor to reduce nitrate to NO 2 -N or NO 3 -N is an electron acceptor to oxidize NH 4 -N, convert ammonia nitrogen and nitrate nitrogen into nitrogen gas N 2 , so as to achieve the denitrification purpose of simultaneously removing two kinds of nitrogen. Compared with the traditional nitrification-denitrification biological nitrogen removal technology, this technology has the following advantages: [0003] (1) Ammonia is directly used as an electron donor for the denitrification reaction without adding an organic carbon source. For high-ammonia-nitrogen wastewater with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 梁祝刘俊新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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