Method for rapidly culturing autotrophic nitrogen removal granule sludge under conditions of low substrate concentration and high ascending velocity
A technology for autotrophic denitrification particles and granular sludge, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of slow growth of anammox bacteria and achieve Shorten the culture time and facilitate the effect of rapid proliferation
Active Publication Date: 2013-05-22
北控水务(中国)投资有限公司
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[0005] Anammox bacteria grow slowly (doubling time 11 days), so the application of anammox is limited to high temperature, high ammonia nitrogen wastewater treatment
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[0022] First, the anaerobic ammonium oxidation granular sludge is crushed and mixed with anaerobic fermentation sludge and aerobic activated sludge according to the mass ratio of 5:75:20. Then the mixed sludge was fed into the upflow anaerobic UASB reactor.
[0023] The reaction zone volume of the anaerobic UASB reactor is 2L, the aspect ratio is (10-20): 1, and is equipped with a constant temperature heating device. The sedimentation area is equipped with a three-phase separator and a sewage return pipe to return the treated sewage to the bottom of the reactor. The reaction area of the reactor is shaded by a shading cloth to avoid the growth of algal substances.
[0024] Artificially synthesized low-ammonia-nitrogen wastewater is used as the influent of the anaerobic UASB reactor, and a small amount of trace elements and inorganic carbon sources are added to ensure the efficient growth and reproduction of autotrophic denitrification bacteria. The concentrations of ammonium...
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The invention provides a method for rapidly culturing autotrophic nitrogen removal granule sludge under conditions of low substrate concentration and high ascending velocity and belongs to the technical field of biological sewage treatment. The method provided by the invention comprises the following steps of: crushing a small amount of anaerobic ammonia oxidation granule sludge, uniformly mixing the crushed anaerobic ammonia oxidation granule sludge with common anaerobic fermentation sludge and aerobic activated sludge and charging the obtained mixture into an upflow anaerobic sludge blanket (UASB) reactor. Artificially synthesized low-ammonia-nitrogen wastewater (total nitrogen is 30-50mg/L) is taken as inflow of the UASB, a continuous flow operation mode is adopted, the ascending velocity of the UASB is 4-7m/h constantly, and culturing is carried out for 50-80 days, so that the high-efficiency autotrophic nitrogen removal granule sludge is obtained. The granule sludge prepared by adopting the method is higher in content of anaerobic ammonia oxidation bacteria, is applicable to treatment of low-ammonia-nitrogen wastewater and is a wastewater biological treatment product with a wide market prospect, wherein the content of anaerobic ammonia oxidation bacteria in the granule sludge is 1.36*10<8>copy/g-MLSS (mixed liquor suspended solids); and when the granule sludge is added into an autotrophic nitrogen removal reactor, the total nitrogen removal rate of the reactor and operation stability of the reactor can be effectively improved, and the problems that urban sewage quantity is high and the autotrophic nitrogen removal granule sludge is easy to run off are solved.
Description
technical field [0001] The invention relates to a method for quickly cultivating autotrophic denitrification granular sludge with low substrate concentration and high rising flow rate, which belongs to the technical field of biological treatment. The cultivated autotrophic denitrification granular sludge is suitable for denitrification treatment of nitrogen-containing wastewater, especially Low ammonia nitrogen wastewater such as domestic sewage. Background technique [0002] Water is the basis for the sustainable development of society and economy. With the acceleration of industrialization in our country, the natural environment, especially the water environment, has been seriously damaged, and the quality of water environment in rivers, lakes and reservoirs is deteriorating day by day. Since the 1980s, the country has accelerated the pace of water environment management, and the sewage treatment rate has been greatly improved. However, the problem of eutrophication in slo...
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IPC IPC(8): C02F3/28C02F3/34
Inventor 彭永臻唐晓雪徐竹兵
Owner 北控水务(中国)投资有限公司
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