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Method and device for realizing advanced nitrogen and phosphorus removal of low-carbon-nitrogen-ratio domestic sewage by adopting step-feed double-short-range anaerobic ammonia oxidation process

A technology of anaerobic ammonia oxidation and staged water inflow, applied in the field of biological sewage treatment, can solve the problems of inability to remove nitrate and nitrogen, deterioration of total nitrogen removal effect, disadvantage, etc., saving labor costs, saving raw water carbon source, and low operating energy consumption Effect

Pending Publication Date: 2021-11-19
BEIJING UNIV OF TECH
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Problems solved by technology

In addition, carbon source is one of the important factors affecting nitrogen conversion. Excessive carbon source will further denitrify the nitrous produced in the short-range denitrification process into nitrogen gas. AOB, NOB) are unfavorable, and too little carbon source will cause some nitrate nitrogen to be unable to be removed, thereby deteriorating the removal effect of total nitrogen

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  • Method and device for realizing advanced nitrogen and phosphorus removal of low-carbon-nitrogen-ratio domestic sewage by adopting step-feed double-short-range anaerobic ammonia oxidation process
  • Method and device for realizing advanced nitrogen and phosphorus removal of low-carbon-nitrogen-ratio domestic sewage by adopting step-feed double-short-range anaerobic ammonia oxidation process

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Embodiment Construction

[0021] The scheme of the present invention will be described in detail in conjunction with the drawings and implementation examples.

[0022]A method and device for treating sewage with a low carbon-to-nitrogen ratio by a double-short-path anammox oxidation process for water inflow, including a raw water tank for urban domestic sewage (1), a double-short-path anammox reactor (2), and an outlet tank (3). The gas and stirring process are all completed by the online monitoring system and feedback control system;

[0023] Part of the sewage in the urban domestic sewage raw water tank (1) enters the double-short-path anammox reactor (2) through the water inlet pump (1-1); the double-short-path anammox reactor (2) includes a pH / DO measuring instrument (2-1), pH / DO probe (2-2), agitator (2-3), biological carrier (2-4), aeration head (2-5), aeration pump (2-6) and Drain valve (2-7), the supernatant after sewage precipitation flows into water outlet tank (3) by drain valve (2-7).

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Abstract

The invention discloses a method and device for realizing advanced nitrogen and phosphorus removal of low-carbon-nitrogen-ratio domestic sewage by adopting a step-feed double-short-range anaerobic ammonia oxidation process, and belongs to the field of biological sewage treatment. The device comprises an urban domestic sewage raw water tank, a double-short-range anaerobic ammonia oxidation reactor and a water outlet tank. Urban domestic sewage enters the integrated reactor in batches and then runs in anoxic and aerobic modes, short-cut denitrification coupling anaerobic ammonia oxidation reaction and phosphorus release occur in an anoxic section, synchronous short-cut nitrification coupling anaerobic ammonia oxidation reaction and phosphorus uptake occur in an aerobic section, and a biological carrier is arranged in the reactor to better retain anaerobic ammonia oxidation bacteria, so that double short-range anaerobic ammonia oxidation is stably realized in the integrated SBR reactor, and advanced nitrogen and phosphorus removal is achieved.

Description

technical field [0001] The invention relates to a method and device for realizing deep denitrification and dephosphorization of domestic sewage with low carbon-to-nitrogen ratio by a double-short-range anaerobic ammonium oxidation process of water inflow, which belongs to the field of sewage biological treatment and is suitable for deep denitrification and dephosphorization of urban domestic sewage. Background technique [0002] Sequencing Batch Activated Sludge (SBR) is an activated sludge wastewater treatment technology that operates in a batch reaction mode. Its main feature is a plug-flow reactor that is completely mixed in space and ideal in time. Traditional SBR reactors usually use nitrification and denitrification processes to treat urban domestic sewage, which requires high aeration volume and external carbon sources to achieve deep denitrification, which increases economic energy consumption and excess sludge production. In order to achieve good SBR reactor perfor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/307C02F3/301C02F3/308
Inventor 彭永臻李文宇李健伟高锐涛李夕耀考成坤
Owner BEIJING UNIV OF TECH
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