Aerobic phosphorus uptake and semi-short-cut nitrification combined with anaerobic ammonium oxidation double granular sludge system for deep nitrogen and phosphorus removal

Abstract

The invention provides a method for advanced denitrification and dephosphorization through an aerobic phosphorus uptake and half shortcut nitrification coupled anaerobic ammonia oxidation double-granule sludge system, belonging to the field of biological sewage treatment. The system comprises a raw municipal sewage tank, an A / O-SBR reactor, an Anammox-SBR reactor, a PLC control box and a computer. The method comprises the following steps: firstly allowing municipal sewage to enter the A / O-SBR reactor, carrying out anaerobic phosphorus release reaction, and controlling DO to be less than 0.2 mg / L; after the reaction is completed, starting aeration, then carrying out aerobic phosphorus uptake and half shortcut nitrification, controlling nitrification process through the output of the computer; after the reaction is completed, carrying out standing and sedimenting, allowing drained water to enter the Anammox-SBR reactor, and carrying out anaerobic ammonia oxidation reaction; and after the reaction is completed, carrying out standing, sedimenting and draining, then collecting concentrations of effluent ammonia nitrogen and nitrite nitrogen, and adjusting reaction time according to the concentrations. The method provided by the invention gives full play to the advantages of granule sludge and autotrophic denitrification; and through online real-time control, system operation is optimized; degree of automation is high; controllability is good; and advanced denitrification and dephosphorization of low C / N domestic sewage can be realized.

Description

technical field [0001] The invention relates to a method for deep denitrification and dephosphorization of a double particle sludge system coupled with aerobic phosphorus uptake and semi-short-range nitrification, and belongs to the technical field of sewage biological treatment. Background technique [0002] In recent years, due to the increasingly prominent problem of "eutrophication" of water bodies and increasingly stringent sewage discharge standards, sewage treatment technology has entered the stage of advanced treatment that removes organic matter and simultaneously removes nitrogen and phosphorus. [0003] In the traditional biological simultaneous denitrification and phosphorus removal system, the removal of nitrogen and phosphorus is completed by the bacteria such as nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria that exist simultaneously in the sludge, and these bacteria have different living habits. There are certain differences, ...

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Problems solved by technology

[0006] Aiming at the problems of low C / N of domestic sewage, poor denitrification and phosphorus removal effect of traditional nitrogen and phosphorus removal process, and large energy consumption, the present invention provides a dual anaerobic ammonium oxidation combined with aerobic phosphorus uptake and semi-short-range nitrification. The deep nitrogen and phosphorus removal method of the granular sludge system can not only solve the problem of insufficient carbon source in the traditional nitrogen and phosphorus removal process, but also save the energy required for aeration. At the same time, it adopts real-time control to improve the controllability and flexibility of the device , realize the synchronous deep removal of nitrogen and phosphorus

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