BAF-MBfR coupled low C/N sewage deep denitrification device and denitrification method for microbial electrolysis cell

A microbial electrolytic cell and deep denitrification technology, applied in the field of deep denitrification devices, can solve the problems of insufficient denitrification effect of electron donors, insufficient carbon source extraction, and high processing cost, so as to avoid the risk of secondary pollution and reduce exposure to exposure. The effect of gas energy consumption and high-efficiency denitrification

Active Publication Date: 2021-01-22
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problem of poor denitrification effect caused by insufficient extraction of carbon source in sewage by existing sewage treatment process, high treatment cost and insufficient electron donor, the present invention proposes a microbial electrolytic cell coupling BAF- MBfR's low C / N sewage deep denitrification device and denitrification method

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  • BAF-MBfR coupled low C/N sewage deep denitrification device and denitrification method for microbial electrolysis cell
  • BAF-MBfR coupled low C/N sewage deep denitrification device and denitrification method for microbial electrolysis cell
  • BAF-MBfR coupled low C/N sewage deep denitrification device and denitrification method for microbial electrolysis cell

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specific Embodiment approach 1

[0024] Embodiment 1: In this embodiment, the low C / N sewage deep denitrification device with microbial electrolytic cell coupled with BAF-MBfR is characterized in that the device is composed of microbial electrolytic cell 1, nitrification cell 7 and denitrification cell 10;

[0025] The microbial electrolytic cell 1 is provided with an anode 2 and a negative electrode 3, and the anode 2 and the negative electrode 3 are respectively connected with the positive pole and the negative pole of the DC power supply 4 arranged outside the microbial electrolytic cell 1; the nitrification tank 7 is a nitrification biological aerated filter tank, and the nitrification tank 7 is filled with filler 8; the denitrification tank 10 is a membrane biofilm reactor, and the denitrification tank 10 is provided with a hollow fiber membrane 9, and the air inlet of the hollow fiber membrane 9 passes through the exhaust port provided on the upper part of the microbial electrolytic cell 1 The gas delive...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that: the bottom of the nitrification tank 7 is provided with an air inlet 12, and the air inlet 12 communicates with the exhaust pipe of the aeration pump 11.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the material of the anode 2 is a biocompatible conductive electrode; the biocompatible conductive electrode is a carbon brush, carbon cloth , carbon fiber cloth, titanium mesh, stainless steel mesh, carbon felt, carbon fiber brush, granular activated carbon or biochar.

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Abstract

The invention discloses a BAFMBfR coupled low C / N sewage deep denitrification device and denitrification method, and relates to a deep denitrification device and denitrification method. The inventionaims to solve the problems of insufficient sewage carbon source extraction, high treatment cost and poor denitrification effect in the existing sewage treatment process. The device is composed of a microbial electrolytic tank, a nitrification tank and a denitrification tank. The method comprises the following steps: an electrolyte is injected into the microbial electrolysis cell, wherein a hydrogen evolution reaction occurs at the cathode in the microbial electrolysis cell to generate hydrogen; effluent of the microbial electrolysis tank enters a nitrification tank, hydrogen is diffused into adenitrification tank through a hollow fiber membrane, and sewage treated in the denitrification tank is discharged. According to the method, the investment of an external carbon source is not needed,the operation cost is reduced, the risk of secondary pollution is avoided, sludge reduction is realized, and the total nitrogen removal rate is remarkably increased. The method is suitable for sewagedenitrification.

Description

technical field [0001] The invention relates to a deep denitrification device and a denitrification method. Background technique [0002] With the acceleration of urbanization, a large amount of pollutants enter the ecosystem, the use of a large amount of agricultural nitrogen fertilizer, the development of animal husbandry and the expansion of industrial manufacturing have made nitrogen pollution very serious. Urban sewage in my country is characterized by low carbon-to-nitrogen ratio (C / N), which often limits the biological nitrogen removal process. Currently, sewage treatment plants supplement electron donors by adding additional organic carbon sources. However, this process undoubtedly increases the treatment cost and the residual organic carbon sources in the effluent may cause secondary pollution. In the traditional denitrification process, taking AO as an example, the current sewage treatment plant has not fully utilized the carbon source in the sewage, and the reflu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/30C02F101/16C02F101/30C02F101/38
CPCC02F3/005C02F3/302C02F2101/30C02F2101/16C02F2101/38
Inventor 冯玉杰梁丹丹何伟华李超
Owner HARBIN INST OF TECH
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