Device and method for biological denitrification of landfill leachate through SBR (Sequencing Batch Reactor) short-cut nitrification-SBBR anaerobic ammonia oxidation combined process

Abstract

The invention provides a device and a method for biological denitrification of landfill leachate through SBR (Sequencing Batch Reactor) short-cut nitrification-SBBR anaerobic ammonia oxidation combined process (Sequencing Batch Biofilm Reactor), belongs to the technical field of biological denitrification, and is applicable to waste water with high ammonia nitrogen and a low carbon nitrogen ratio (C / N). The device provided by the invention is provided with SBR and SBBR. The SBR reactor is mainly used for a short-cut nitrification reaction, and hereinafter referred to as SBRSBNR; the SBBR reactor is mainly used for an anaerobic ammonia oxidation reaction, and hereinafter referred to as SBBRANAMMOX. The raw liquor of the leachate is mixed with SBBRANAMMOX effluent reflux at first and then fed into the SBRSBNR for denitrification; the raw liquor of the leachate can be diluted, and partial nitric nitrogen in water also can be removed by taking full advantage of the carbon source in the raw water. Next, the effluent of the SBRSBNR is further mixed with the raw liquor of the leachate, and fed into the SBBRANAMMOX for an anaerobic ammonia oxidation-denitrification synchronous denitrification reaction; consequently, synchronous removal of nitrogen and COD (Chemical Oxygen Demand) is realized. The system removal rate of COD is 91%, the removal rate of TN is greater than 97.5%, and the total nitrogen load of the SBBRANAMMOX is about 0.7 Kg TN / m<3>.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification of sewage, and is suitable for treating waste water with high ammonia nitrogen concentration and low C / N such as late garbage leachate. Specifically, it has the following technical characteristics: (1) Through reflowing an appropriate amount of SBBR ANAMMOX Outlet to SBR SBNR In the process, the organic carbon source in the leachate is used for denitrification reaction, which removes the COD in the raw water while removing the residual nitrate nitrogen in the anammox reactor, and also provides a certain alkalinity for the nitrification reaction; (2) through dynamic (3) Realize anammox-denitrification synchronous reaction through biofilm system, and remove COD while denitrification. Background technique [0002] In recent years, with the acceleration of urban development in my country, the output of urban domestic waste has also continued to increase, and sanitary landfill has ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the above problems, providing a device and method for short-range nitrification-ANAMMOX biological denitrification of landfill leachate, to solve the problem that landfill leachate is difficult to handle due to high ammonia nitrogen and low C / N ratio, It also solves the problem of insufficient alkalinity when the landfill leachate realizes the full short-range and the high residual nitrate nitrogen in the effluent water treated by anaerobic ammonium oxidation, and improves the removal rate of TN

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