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Method and device for treating coking wastewater and producing hydrogen gas by microbial electrolysis cell

A technology for microbial electrolysis cells and coking wastewater, which is applied in biological water/sewage treatment, biochemical fuel cells, chemical instruments and methods, etc., can solve the problems of complicated operation, long time-consuming coking wastewater, etc., and achieves low consumption cost, low investment, Good economic and environmental benefits

Inactive Publication Date: 2017-05-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the technical problems of complex operation and long time-consuming treatment of coking wastewater in existing wastewater treatment methods and devices, and provide a method that uses coking bacteria as a biocatalyst to degrade toxic substances in coking wastewater and generate hydrogen by using a microbial electrolytic cell method and device

Method used

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  • Method and device for treating coking wastewater and producing hydrogen gas by microbial electrolysis cell
  • Method and device for treating coking wastewater and producing hydrogen gas by microbial electrolysis cell
  • Method and device for treating coking wastewater and producing hydrogen gas by microbial electrolysis cell

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Embodiment 1

[0062] figure 1 Schematic diagram of a microbial electrolytic cell. The anode microorganisms oxidize the organic matter in the coking wastewater to produce hydrogen ions and electrons. The generated electrons are transmitted to the anode of the microbial electrolysis cell through the mediator or the microbial respiratory chain, and are transmitted to the cathode from the external circuit through the wire. The hydrogen ions pass through the proton The exchange membrane is transferred to the cathode, and the hydrogen ions in the cathode compartment accept electrons under a certain voltage to produce hydrogen.

[0063] Such as figure 2 As shown, a device for treating coking wastewater and producing hydrogen using a microbial electrolytic cell in this embodiment includes an electrolytic cell 1, which also includes a coking wastewater storage tank 2, tap water storage tank 3, anolyte storage tank 4, catholyte Storage tank 5, cathode waste liquid storage tank 6, two switches 7, 8...

Embodiment 2

[0103] In this embodiment, a device for treating coking wastewater and producing hydrogen using a microbial electrolytic cell is the same as that in Embodiment 1.

[0104] A method for treating coking wastewater and producing hydrogen by utilizing the above-mentioned microbial electrolytic cell, comprising the following steps:

[0105] 1) Activation of coking wastewater bacteria

[0106] Take the bacterial sludge from the aerobic tank and the anaerobic tank of the coking plant and mix it according to the mass ratio of 1:1.2, and store the mixed bacterial sludge in the freezer for later use; when using it, first put the mixed bacterial sludge in a 6°C freezer After thawing, the microbial fuel cell anolyte was added to the mixed bacterial sludge until the mixed bacterial sludge was submerged, and activated at 30°C for 96 hours;

[0107] 2) Treatment of anode electrode carbon felt

[0108] Its processing steps are as follows:

[0109] ①Rinse with distilled water; ②Soak in 0.5mol...

Embodiment 3

[0137] In this embodiment, a device for treating coking wastewater and producing hydrogen using a microbial electrolytic cell is the same as that in Embodiment 1.

[0138] A method for synchronously producing hydrogen from coking wastewater by using the above-mentioned microbial electrolytic cell, comprising the following steps:

[0139] 1) Activation of coking wastewater bacteria

[0140] Take the bacterial sludge from the aerobic tank and anaerobic tank of the coking plant and mix it at a mass ratio of 1:1.5, and store the mixed bacterial sludge in the freezer for later use; when using it, first place the mixed bacterial sludge in a freezer at 8°C After thawing, the microbial fuel cell anolyte was added to the mixed bacterial sludge until the mixed bacterial sludge was submerged, and activated at 35°C for 120 hours;

[0141] 2) Treatment of anode electrode carbon felt

[0142] Its processing steps are as follows:

[0143]①Rinse with distilled water; ②Soak in 0.5mol / L HCl ...

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Abstract

The invention belongs to the technical field of sewage treatment methods and devices, and particularly relates to a method and a device for treating coking wastewater and producing hydrogen gas by a microbial electrolysis cell. According to the method, coking bacteria are used as a biocatalyst; the microbial electrolysis cell is used for degrading toxic substances in the coking wastewater and producing the hydrogen gas. A microbial fuel cell is built through coding wastewater bacterium activation, anode electrode carbon felt and cathode electrode Pt-loaded carbon cloth treatment; after current reaches a stable highest value, the microbial fuel cell is converted into the microbial electrolysis cell; identically, after the current reaches the stable highest value, a dilution method is used for performing anti-toxic domestication on a biological membrane of the microbial electrolysis cell; then, the coking wastewater can be directly treated, and harmful substances in the coding wastewater are eliminated. By using the method and the device for removing the harmful substances from the coding wastewater, the harmful substance removal rate of 90 percent or more can be achieved only through 72h; the good economic benefits and environment-friendly benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment methods and devices, in particular to a method and device for degrading toxic substances in coking wastewater and generating hydrogen by using coking bacteria as biocatalysts. Background technique [0002] Coking wastewater is industrial wastewater generated in the process of coking, gas purification and coking product recovery. The pollutants contained in it are of various types and complex components, and have the characteristics of difficult biodegradation, high toxicity, and some pollutants are carcinogenic. The pollutants mainly include sulfide, ammonia nitrogen, phenol and cyanide. The current annual discharge of coking wastewater in my country is about 300 million tons, because coking wastewater not only pollutes water bodies and soil, destroys the ecological environment, but also further affects people's lives and seriously endangers human production and living activities. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34H01M8/16C25B1/04C25B11/08C25B11/12
CPCC02F3/34C25B1/04C25B11/043C25B11/081H01M8/16Y02E60/36Y02E60/50
Inventor 赵煜董志帅王俊文樊磊卫国强杨慧敏钟丽萍刘益明
Owner TAIYUAN UNIV OF TECH
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