Treatment method for biological nitrogen removal of reinforced sewage

A treatment method, sewage biological technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of slow nitrification and denitrification reactions, reduced bacterial activity, and reaction rate Low-level problems, to achieve the effect of reducing aeration, high controllability, and strengthening nitrification function
CN101857337AActive Publication Date: 2010-10-13NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
Publication Date
2010-10-13

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Abstract

The invention discloses a treatment method for biological nitrogen removal of reinforced sewage, which comprises the following steps of: 1, feeding all or partial treated sewage and sludge refluxed from a secondary sedimentation tank into a reflux sludge denitrification unit together by adopting division point inflow; 2, feeding the outflow of the reflux sludge denitrification unit and the residual sewage to an anaerobic unit or an anoxic unit; 3, feeding the outflow of the anaerobic unit to the anoxic unit, and refluxing the mixed solution of an aerobic unit to the anoxic unit; 4, feeding the outflow of the anoxic unit to a transition unit; 5, feeding the outflow of the transition unit to the aerobic unit, and refluxing the mixed solution of the aerobic unit to the anoxic unit from the outflow end of the aerobic unit; and 6, feeding the outflow of the aerobic unit to the secondary sedimentation tank to perform sludge-water separation. The method can be operated in multiple modes of A-A2O, nitrogen removal AO, inverse AAO and the like and has high controllability, and a system has strong nitrogen removal capability. The method is suitable for upgrade and reform of newly built sewage treatment plants of towns lacking the land and the conventional sewage treatment plants.
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Description

Technical field:

[0001] The invention belongs to the technical field of environmental protection sewage treatment, and in particular relates to a treatment method for strengthening sewage biological denitrification. Background technique:

[0002] With the rapid development of my country's economy and the increase of population, the pollution of water environment has shown a certain trend of aggravation, and the phenomenon of eutrophication in water bodies has become more serious. Therefore, the discharge standards of pollutants in urban sewage treatment plants are becoming more and more stringent, especially the nitrogen and phosphorus indicators. And with the improvement of economic level and people's quality of life and the enhancement of environmental protection awareness, the emission standards will continue to increase. This means that my country's new sewage treatment plants and existing sewage treatment plants have put forward higher and higher requirements for nitroge...

Claims

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