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High-efficiency stable short-range nitration-anaerobic ammonia oxidation biological denitrification method

A technology of anaerobic ammonium oxidation and anammox bacteria, applied in the field of sewage biological denitrification, to achieve the effect of stabilizing the degradation efficiency of ammonia nitrogen

Inactive Publication Date: 2013-08-14
NANKAI UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to propose a highly efficient and stable short-range nitrification-anammox biological denitrification method for the problems existing in various reactors and operating modes for realizing the SHARON-ANAMMOX process

Method used

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  • High-efficiency stable short-range nitration-anaerobic ammonia oxidation biological denitrification method

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Embodiment 1

[0018] Anaerobic ammonium oxidation activated sludge 2.5×10 4 mg / L, 3% sodium alginate, and 2% porous material zeolite were mixed evenly, and then dropped into 2% calcium chloride solution to form small balls to obtain embedded anammox gel balls.

[0019] Polyethylene hollow porous pellets are used as biofilm carriers, and the embedded anammox bacteria are placed in the middle of the hollow pellets. As shown in the attached figure, the pellets are placed in ammonia nitrogen 20mg / L and nitrosative bacteria sludge 5×10 3 mg / L water with oxygen-limited aeration (DO1mg / L), nitrosative bacteria grow and multiply on the surface of porous plastic beads to form biofilms.

[0020] A 14L upflow expanded bed reactor is used, and the biofilm-immobilized nitrosating bacteria and embedded and immobilized anammox bacteria are added to account for about 2 / 3 of the reactor to optimize the control of nitrosation-anammox synergy Coupled reaction conditions, the ammonia nitrogen degradation eff...

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Abstract

The invention relates to a high-efficiency stable short-range nitration-anaerobic ammonia oxidation biological denitrification method. The method disclosed by the invention couples the biological membrane and embedding technologies, can be used for immobilizing the anaerobic ammonia oxidation bacterium by adopting a modified embedding material with good mass transfer property and is put into a porous biological membrane spherical carrier with nitrococcus to intensify the mass transfer process, can be used for regulating the microbe enrichment degree according to the speed of nitrosation- anaerobic ammonia oxidation reaction, realizes the coordinating exertion of the biological effect of two bacteria and achieves the continuous, coordinating and stable operation of the process by adopting an up-flow expanded bed reactor and optimally controlling process conditions, thereby realizing the simplicity, stabilization, efficiency and economization of a short-range nitration-anaerobic ammonia oxidation process.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification of sewage, in particular to an efficient and stable short-range nitrification-anammox biological denitrification method. Background technique [0002] With the aggravation of nitrogen pollution and the gradual enhancement of people's environmental awareness, denitrification technology, especially wastewater biological denitrification technology has attracted widespread attention from all over the world. Especially in my country, due to the hazard warnings brought about by the eutrophication of lakes caused by nitrogen pollution in recent years and the continuous improvement of social requirements for advanced sewage treatment, it is imminent to study denitrification technology. The traditional biological denitrification technology - nitrification / denitrification process consumes a lot of dissolved oxygen and organic carbon sources, and the investment and operation costs are rela...

Claims

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Application Information

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IPC IPC(8): C02F3/28
Inventor 郭晓燕
Owner NANKAI UNIV
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