Anaerobic ammonia oxidation deep denitrification method for municipal sewage

A technology of anaerobic ammonium oxidation and urban sewage, applied in the field of deep denitrification of urban sewage anaerobic ammonium oxidation, can solve the problems of inability to meet discharge requirements, low nitrogen removal rate, increase of external carbon sources, etc., to promote resource utilization Utilization, high economic benefits, and the effect of reducing carbon emissions

Pending Publication Date: 2022-06-14
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that after removing most of the organic matter in urban sewage, the removal rate of nitrogen is not high when the traditional nitrification and denitrification process is used for denitrification treatment, which cannot meet the increasingly stringent discharge requirements. Requirements, or the need to increase exogenous carbon sources, resulting in increased costs

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  • Anaerobic ammonia oxidation deep denitrification method for municipal sewage
  • Anaerobic ammonia oxidation deep denitrification method for municipal sewage
  • Anaerobic ammonia oxidation deep denitrification method for municipal sewage

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Embodiment 1

[0062] In this embodiment, after the urban sewage undergoes enhanced primary sedimentation, the ammonia nitrogen concentration in the enhanced primary sedimentation effluent is 50 mg / L, and the C / N ratio is 4. The specific operation process is as follows: figure 2 shown, including the following steps:

[0063] 1. Set the flow to Q 0 The enhanced primary settling effluent is split, and the main stream flow is Q 1 , the tributary flow is Q 2 , sewage contains COD and ammonia nitrogen.

[0064] 2. Mainstream Q 1 Enter the anoxic tank and aerobic tank to carry out the nitrification and denitrification process. The nitrification and denitrification bacteria make full use of the organic matter in the sewage to carry out nitrification and denitrification through the backflow of the nitrification solution to obtain nitrogen gas and nitrification and denitrification effluent. The nitrification and denitrification effluent contains the remaining nitrate. The concentration of nitrat...

Embodiment 2

[0073] In this embodiment, after the urban sewage undergoes enhanced primary sedimentation, the ammonia nitrogen concentration in the enhanced primary sedimentation effluent is 50 mg / L, and the C / N ratio is 2. The specific operation process is as follows: figure 2 shown, including the following steps:

[0074] 1. Set the flow to Q 0 The enhanced primary settling effluent is split, and the main stream flow is Q 1 , the tributary flow is Q2 , sewage contains COD and ammonia nitrogen.

[0075] 2. Mainstream Q 1 Enter the anoxic tank and aerobic tank for nitrification and denitrification process, through the backflow of nitrification solution, the nitrification and denitrification bacteria make full use of the organic matter in the sewage to carry out nitrification and denitrification, and obtain nitrogen and nitrification and denitrification effluent. The nitrification and denitrification effluent contains the remaining nitrate. The concentration of nitrate nitrogen is 30 mg / ...

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Abstract

The invention discloses an anaerobic ammonia oxidation deep denitrification method for urban sewage, which comprises the following steps: carrying out enhanced primary sedimentation on the urban sewage, shunting the obtained enhanced primary sedimentation effluent, and carrying out nitrification and denitrification treatment on the main stream in an anoxic tank and an aerobic tank to respectively obtain nitrogen and nitrification and denitrification effluent; performing short-cut denitrification treatment on the branch and the nitrification and denitrification effluent to obtain short-cut denitrification effluent containing nitrite nitrogen and ammonia nitrogen; carrying out anaerobic digestion on the primary sludge to obtain anaerobic digestion liquid and methane; the anaerobic digestion liquid is subjected to short-cut nitrification and then mixed with short-cut nitrification effluent containing nitrite provided by side flow in an anaerobic ammonia oxidation reaction tank, nitrogen and anaerobic ammonia oxidation effluent are obtained, and deep denitrification treatment of the urban sewage is completed. According to the anaerobic ammonia oxidation deep denitrification method for the municipal sewage, organic matters in the municipal sewage are subjected to resource recovery, the effluent quality is improved, an additional carbon source does not need to be added, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a method for deep denitrification by anaerobic ammonium oxidation of urban sewage, and belongs to the technical field of sewage biological treatment. Background technique [0002] At present, the recycling of organic matter in urban sewage mainly includes: anaerobic treatment by anaerobic membrane bioreactor, enhanced primary sedimentation to remove organic matter, rapid adsorption of organic matter by high-load activated sludge method, and anaerobic treatment of sedimentary sludge. Oxygen digestion produces energy substances such as methane. The above method greatly reduces the carbon emission in the subsequent process and improves the energy recovery efficiency. [0003] If a large amount of nitrogen, phosphorus and other substances contained in urban sewage are directly discharged without treatment, it will cause deterioration of water quality, especially the discharge of nitrogen, which will cause serious eutrophication of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F11/04C02F9/14C02F101/30C02F101/16C02F101/38
CPCC02F3/307C02F3/303C02F3/305C02F11/04C02F3/34C02F2001/007C02F2101/30C02F2101/38C02F2101/16C02F2101/163C02F2101/166C02F2209/14C02F2209/15C02F2305/06
Inventor 刘建勇林驰浩
Owner SHANGHAI UNIV
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