Method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage

A technology of aerobic granular sludge and cultivation method, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of low operation efficiency, reduced floor space, unstable nitrosation, etc. , to achieve the effect of increasing the proportion, solving the poor settlement performance, and having a broad market application prospect
CN101531983AActive Publication Date: 2009-09-16BEIJING DRAINAGE GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING DRAINAGE GRP CO LTD
Publication Date
2009-09-16

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Abstract

The invention relates to a method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage, which is characterized in that an SBR reactor adopts ratio of height to diameter of 1.8-10 and volume exchange rate of 50-67%; the sedimentation time is 30-50min, which is gradually shortened to 3min, or the sedimentation time is set as 5-8min. In the process of biochemical reaction, dissolved oxygen (DO) and pH value are regarded as real-time control parameters; aeration time is controlled according to the fuzzy control rule; nitrification is controlled to stop on the short-cut nitrification stage. The method can increase the content of ammonia oxidizing bacteria and volume load, shorten nitration reaction time, improve the sedimentation property of the sludge by a wide margin, shorten sedimentation time, narrow the floor area of the reactor and solve the problems of low operating efficiency and unstable nitrosification caused by time program control of the sewage treatment system. The aerobic short-cut nitrification granular sludge prepared by the invention is suitable for treating high-concentration ammonia nitrogen wastewater with low COD and is a biological wastewater treatment technology with broad market prospect.
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Description

Technical field

[0001] The invention relates to a culturing method for treating domestic sewage nitrosated aerobic granular sludge and a fuzzy control device and method thereof, belonging to the technical field of sewage biological treatment. Background technique

[0002] With the development of industrial and agricultural production and the improvement of people's living standards, nitrogen pollution has intensified, not only causing eutrophication of water bodies, but also seriously disrupting the aquatic ecosystem. In the latest "Emission Standard of Pollutants for Urban Sewage Treatment Plants" (GB18918-2002) promulgated in 2002, my country requires that the effluent of all urban sewage treatment plants be discharged into rivers with small dilution capacity as urban landscape water and general reuse water. Implement the A standard of the primary standard, namely TN<15mg / L, NH 4 -N<5mg / L (<8mg / L when the water temperature is lower than 12℃). At present, almost all urb...

Claims

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