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Integrated device and method for enhancing deep denitrification of A/O (anoxic-oxic) technology by introducing AMX (anammox) bacteria

An anaerobic ammonia oxidation and deep denitrification technology, applied in the field of sewage treatment, can solve problems such as the lack of sewage treatment facilities, and achieve the effect of easy management, easy operation, saving carbon source and energy consumption

Inactive Publication Date: 2018-09-28
HARBIN INST OF TECH AT WEIHAI +1
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Problems solved by technology

At present, the situation of domestic sewage treatment in rural areas in my country is worrying, the amount of sewage discharge continues to increase, and sewage treatment facilities are scarce

Method used

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  • Integrated device and method for enhancing deep denitrification of A/O (anoxic-oxic) technology by introducing AMX (anammox) bacteria

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Embodiment approach

[0018] 1) Taking the domestic sewage in a family area of ​​a university as the research object, the sewage first enters the non-aeration compartment (1) of the high-efficiency tank through the septic tank, and at the same time, the nitrifying liquid also flows back to the non-aeration compartment through the air lift return pipe (10) According to the concentration of influent organic matter, the reflux ratio of the nitrification liquid is adjusted through the electric valve (9), so that the C / N ratio in the non-aerated area is between 2 and 4, so that the denitrifying bacteria can use the limited carbon source in the raw water to Nitrate nitrogen was reduced to nitrite nitrogen, and the maximum nitrite accumulation rate was obtained, which provided substrate for the anammox reaction. The nitrite produced by partial denitrification and the ammonia nitrogen contained in the raw water undergo anaerobic ammonium oxidation reaction under the action of the AMX bacteria enriched in th...

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Abstract

The invention discloses an integrated device and a method for enhancing deep denitrification of an A / O (anoxic-oxic) technology by introducing AMX (anammox) bacteria for partial denitrification coupled with anammox, and belongs to the technical field of municipal sewage treatment. The device consists of a high-efficiency tank, and auxiliary equipment and biological filler in the high-efficiency tank, wherein the high-efficiency tank mainly adopts the A / O technology. The method comprises the following steps of introducing the AMX bacteria to generate the partial denitrification coupled with anammox at the non-aeration area of the multistage A / O high-efficiency tank; removing organic matters, and denitrifying; then, performing anoxic synchronous nitrification and denitrification in the aeration area to further denitrify; after reaction is completed, sending drained water into a clean water tank to recycle, or draining. The device and the method have the advantages that the immobilized biological filler is used for providing a carrier for the AMX bacteria with longer growth and propagation period; the stable reaction conditions are provided for the partial denitrification coupled withanammox by controlling the gas stripping reflux, aeration amount, C / N (carbon to nitrogen) ratio and HRT (hydraulic retention time), so as to complete deep denitrification of domestic sewage at a lowC / N ratio.

Description

technical field [0001] An integrated device and method for intensifying the deep denitrification of the A / O process by introducing AMX (anaerobic ammonium oxidation) bacteria belongs to the technical field of sewage treatment, and is especially suitable for domestic sewage treatment of single household (or multi-household) in rural areas. Background technique [0002] The national rural sewage treatment rate is currently less than 20%, and rural domestic sewage treatment has become an important part of rural environmental protection. At present, the situation of domestic sewage treatment in rural areas of our country is worrying, the amount of sewage discharge continues to increase, and sewage treatment facilities are scarce. After the domestic sewage of a single household or several nearby households is collected in pieces, separate treatment is a very feasible treatment mode. It has the characteristics of simple operation and management and flexible use. It is suitable for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F3/10C02F101/30C02F101/16
CPCC02F3/101C02F3/307C02F3/34C02F2101/163C02F2101/30C02F2209/14Y02W10/10
Inventor 赵伟华张瑛洁王忠祥王凯
Owner HARBIN INST OF TECH AT WEIHAI
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