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Water treatment device and water treatment method of forward osmosis membrane bioreactor assisted by air-cathode bioelectrochemical system

A water treatment device and bioelectrochemical technology, applied in the field of water treatment, can solve the problems of low denitrification efficiency and achieve the effects of improving denitrification efficiency, reducing costs and improving decontamination ability

Pending Publication Date: 2021-11-05
NANJING NORMAL UNIVERSITY
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Problems solved by technology

But so far, BES (bioelectrochemical) has not been studied to improve the low nitrogen removal efficiency in FO-based treatment systems

Method used

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  • Water treatment device and water treatment method of forward osmosis membrane bioreactor assisted by air-cathode bioelectrochemical system
  • Water treatment device and water treatment method of forward osmosis membrane bioreactor assisted by air-cathode bioelectrochemical system

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Embodiment Construction

[0018] Below in conjunction with specific embodiment, further illustrate the present invention.

[0019] Such as figure 1 , figure 2 As shown, the water treatment device of the air cathode bioelectrochemical system assisted forward osmosis membrane bioreactor of the present invention includes a reaction tank 1, a raw material liquid tank 2, a draw liquid tank 3 and communication pipelines.

[0020] The reaction cell 1 comprises two compartments, an anode compartment 101 and a draw solution compartment 103, an air cathode 102 is arranged on one side of the anode compartment 101, the volume of both compartments is 50ml, and the surface area of ​​the air cathode carbon paper is 0.0025m 2 The air cathode 102 and the anode chamber 101 are separated by a glass fiber membrane 104, the anode chamber 101 and the draw solution chamber 103 are separated by a forward osmosis membrane 105, and the side of the forward osmosis membrane 105 near the anode chamber 101 is the feed side, The ...

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Abstract

The invention discloses a water treatment device and a water treatment method of a forward osmosis membrane bioreactor assisted by an air-cathode bioelectrochemical system. According to the invention, a reaction tank of the water treatment device comprises an anode chamber and a draw solution chamber which are separated by a forward osmosis membrane; and an air cathode is arranged on one side of the anode chamber and is separated from the anode chamber through a glass fiber membrane. In the water treatment method, anaerobic sludge in the anode chamber degrades organic substances to generate electrons which are transmitted to the cathode; oxygen at the cathode is combined with electrons and protons to generate water, and electric energy is generated in the process; a nitrification process is carried out at the cathode at the same time, current drives nitrate ions to migrate to the anaerobic anode, and anaerobic microorganisms of the anode utilize reverse osmosis organic draw liquid as a carbon source for denitrification so as to denitrify nitrate into nitrogen; and a part of water molecules in the anode chamber enter a draw liquid side through the forward osmosis membrane. According to the invention, denitrification efficiency is high, and the concentration of pollutants in effluent at a feed liquid side can be reduced; and in addition, the air cathode does not need aeration, so energy is saved, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a water treatment device for an air cathode bioelectrochemical system assisted forward osmosis membrane bioreactor, and also relates to a water treatment device for an air cathode bioelectrochemical system assisted forward osmosis membrane bioreactor Approach. Background technique [0002] Forward osmosis membrane bioreactors (Osmotic Membrane Bioreactors, OMBR) is a membrane-based treatment technology that recovers high-quality water from wastewater through forward osmosis (FO). Microbial Fuel Cells (MFCs) can use electrogenic microorganisms as catalysts to degrade pollutants in wastewater, and at the same time convert chemical energy in wastewater pollutants directly into electrical energy. The osmotic microbial fuel cell system is a combination of forward osmosis membrane and traditional microbial fuel cell, which is mainly used to solve the problem of membrane foulin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F101/16
CPCC02F3/005C02F2101/16
Inventor 杨玉立吴忧
Owner NANJING NORMAL UNIVERSITY
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