Device and method for treating low-carbon wastewater by multistage drainage type simultaneous shortcut nitrification-denitrification phosphorus removal paralleled with anammox

Abstract

The invention belongs to the technical field of wastewater biological treatment, especially relates to a device and a method for treating low-carbon wastewater by multistage drainage type simultaneous shortcut nitrification-denitrification phosphorus removal paralleled with anammox. Firstly, carrying out anaerobic agitation on low-carbon wastewater which enters into a simultaneous shortcut nitrification-denitrification phosphorus removal SBR reactor from a low-carbon wastewater raw water tank, opening an air pump and regulating a gas flow indicator after finishing the anaerobic agitation to make the simultaneous shortcut nitrification-denitrification phosphorus removal SBR reactor enter an aeration agitation stage; opening a third water inlet pump after finishing aeration agitation, pumping two times of draining water in a first middle water tank into an anammox SBR reactor, then opening a second water inlet pump after carrying out the anaerobic agitation, pumping draining water collected in a second middle water tank into the simultaneous shortcut nitrification-denitrification phosphorus removal SBR reactor, and carrying out anoxic agitation to realize deep nitrogen and phosphorus removal; the device provided by the invention has the advantages of simple structural process, low operation expense, low energy consumption and oxygen consumption, and low sludge yield, and is free of secondary pollution.

Description

Technical field: [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a multi-stage drainage synchronous short-range nitrification and denitrification dephosphorization parallel anaerobic ammonium oxidation treatment device and method for low-carbon sewage. Background technique: [0002] In the traditional biological nitrogen and phosphorus removal process, the sewage carbon-nitrogen ratio (C / N ratio, the ratio of COD to total nitrogen) must be greater than 15 to meet the removal of nitrogen and phosphorus and the growth of microbial cells; when the sewage C / N ratio When it is lower than 6, it is often necessary to add external carbon sources to realize the simultaneous removal of nitrogen and phosphorus. Commonly used external carbon sources include methanol, ethanol, acetic acid, etc., but the addition of external carbon sources increases the operating cost of the sewage treatment plant by nearly 10%. Therefore, ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology, solve the problems of high energy consumption and oxygen consumption, insufficient carbon source, incomplete nitrogen and phosphorus removal when the traditional nitrogen and phosphorus removal process is used to treat low-carbon sewage, and provide a multi-stage drainage type The device and method for synchronous short-range nitrification and denitrification phosphorus removal in parallel with anaerobic ammonium oxidation treatment of low-carbon sewage, according to the water quality characteristics of low-carbon sewage, combined with synchronous nitrification and denitrification phosphorus removal, short-range nitrification, anaerobic ammonium oxidation and other new biological denitrification Phosphorus removal technology, on the basis of making full use of raw water carbon sources, realizes the deep denitrification and dephosphorization of low-carbon sewage, and adopts anaerobic and aerobic segmented drainage methods in the simultaneous short-range nitrification and denitrification dephosphorization SBR process for the follow-up Anaerobic ammonia oxidation SBR provides stable ammonia nitrogen and nitrite influent; at the same time, synchronous short-range nitrification and denitrification phosphorus removal sludge and anaerobic ammonium oxidation sludge are separately cultivated to solve the contradiction in terms of sludge age and have a process flow Simple, low energy consumption and other advantages

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