Device and method for synchronous SBR denitrifying phosphorus removal and internal source short-range denitrifying anaerobic ammonia oxidation

Abstract

The invention provides a device and method for synchronous SBR denitrifying phosphorus removal and internal source short-range denitrifying anaerobic ammonia oxidation, and belongs to the field of biological treatment of sewage. The device mainly comprises an urban sewage raw water tank, an anaerobic / anoxic SBR, an intermediate water tank, an all-way nitrifying SBR, a blast aerator and a water drainage tank. Urban sewage with low C / N enters the anaerobic / anoxic SBR at first, PAOs carries out anaerobic phosphorus release, and meanwhile, the urban sewage is stored as an internal carbon source PHA by COD in raw water. Anaerobic / anoxic SBR denitrifying phosphorus-accumulating bacteria exist as bio-flocculate, short-range denitrifying bacteria and anaerobic ammonium oxidation bacteria which have long sludge age exist as biological membranes and grow in packing of a reactor, and the SBR discharges flocculate sludge at regular intervals to remove phosphorous, so that competition of different bacteria to the sludge age is avoided. By the device and method, N, P and COD of the urban sewage with low C / N can be removed effectively, and an external carbon source is not required; the problem that NO2<-> is difficult to obtain stably by short-range nitrifying is solved; a new treatment mode is provided for wastewater containing NO3<-> and P.

Description

technical field [0001] The invention relates to a device and method for synchronous endogenous short-range denitrification anaerobic ammonium oxidation by SBR denitrification and phosphorus removal, belonging to the technical field of sewage biological treatment. Background technique [0002] The problem of eutrophication of water body has attracted more and more attention from all over the world, and the direct cause of eutrophication of water body is the excessive discharge of N and P elements into water body, so nitrogen and phosphorus removal from sewage has become a research hotspot. The main technical problems in my country's sewage treatment include: insufficient carbon source in sewage, low nitrogen and phosphorus removal efficiency, high treatment costs in sewage treatment plants, and effluent that cannot reach Grade A. [0003] At the end of the 20th century, Delft University in the Netherlands developed a new process of sewage biological treatment - anaerobic ammo...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for SBR denitrification and phosphorus removal synchronous endogenous short-range denitrification anaerobic ammonium oxidation, which solves the problem of insufficient carbon source for sewage treatment, effluent not reaching Grade A and high treatment costs, etc. problems, to achieve stable denitrification and dephosphorization

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