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Method for biological treatment of sulfate wastewater employing synchronous electric catalysis of anode and cathode

An electrocatalytic sulfate and biological treatment technology, which is applied in the field of resource treatment of sulfate wastewater, can solve the problems of low utilization rate of electrocatalytic electric energy and no use of electric field anodes, etc., and achieve the effect of increasing the rate and reducing consumption

Active Publication Date: 2013-09-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current electro-biocoupling technology is basically aimed at cathode electrons, and the electric field anode is often not used, so that the utilization rate of electric energy in the electrocatalysis process is not high.

Method used

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  • Method for biological treatment of sulfate wastewater employing synchronous electric catalysis of anode and cathode

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This example is a process of using an electrocatalytic bioreactor to treat 7-ACA pharmaceutical wastewater.

[0060] The characteristics of the treated 7-ACA pharmaceutical wastewater are as follows:

[0061] Wastewater pH: 8.02~8.29, SO 4 2- : 1800~3200mg / L, COD: 6000~8000mg / L, NH 4 -N: 700-800mg / L.

[0062] Steps to treat 7-ACA pharmaceutical wastewater:

[0063] (1) Before the wastewater continuously enters the electrocatalytic bioreactor, microorganisms are inoculated into the cathode reaction area and the anode reaction area of ​​the reactor respectively, and the microorganisms in the cathode and anode reaction areas of the electric field are activated independently at the same time. The microorganisms inoculated in the cathode reaction zone are mainly Desulfovibriosp., and the microorganisms inoculated in the anode reaction zone are mainly Thiobacillus thioparus;

[0064] (2) The culture medium in the cathode reaction zone is configured with ultrapure water, ...

Embodiment 2

[0074] This embodiment is the process of using an electrocatalytic biological reaction device to treat acid mine wastewater.

[0075] The characteristics of the treated acid mine wastewater are as follows:

[0076] Wastewater pH: 3.00~3.46, SO 4 2- : 6000~8000mg / L, COD4 -N: 35-50 mg / L.

[0077] Steps for treating acid mine wastewater:

[0078] (1) Before the wastewater continuously enters the electrocatalytic bioreactor, microorganisms are inoculated into the cathode reaction area and the anode reaction area of ​​the reactor respectively, and the microorganisms in the cathode and anode reaction areas of the electric field are activated independently at the same time. The microorganisms inoculated in the cathode reaction zone are mainly Desulfovibriosp., and the microorganisms inoculated in the anode reaction zone are mainly Thiobacillus thioparus;

[0079] (2) The culture medium in the cathode reaction zone is configured with ultrapure water, and the composition of the cul...

Embodiment 3

[0090] This embodiment is the process of using an electrocatalytic biological reaction device to treat monosodium glutamate wastewater.

[0091] The characteristics of MSG wastewater treated are as follows:

[0092] Wastewater pH: 6.5~6.8, SO 4 2- : 12000~15000mg / L, COD: 10000mg / L.

[0093] Steps to treat MSG wastewater:

[0094] (1) Before the wastewater continuously enters the electrocatalytic bioreactor, microorganisms are inoculated into the cathode reaction area and the anode reaction area of ​​the reactor respectively, and the microorganisms in the cathode and anode reaction areas of the electric field are activated independently at the same time. The microorganisms inoculated in the cathode reaction zone are mainly Desulfovibriosp., and the microorganisms inoculated in the anode reaction zone are mainly Thiobacillus thioparus;

[0095] (2) The culture medium in the cathode reaction zone is configured with ultrapure water, and the composition of the culture medium is...

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Abstract

The invention provides a method for biological treatment of sulfate wastewater employing synchronous electric catalysis of an anode and a cathode. The method comprises the following concrete steps of: (1) building an electric catalytic bioreactor, which includes a cathode reaction zone, a buffer zone and an anode reaction zone; (2) inoculating mixed bacteria of sulfate reducing bacteria inside the cathode reaction zone, leading to a culture medium, electrifying and acclimatizing, and cultivating for 3-5 days at 28-34 DEG C, so as to achieve cathode hanging membrane of the sulfate reducing bacteria; (3) inoculating sulfur-oxidizing bacteria inside the anode reaction zone, leading to the culture medium to cultivate for 5-7 days at 25-30 DEG C; and (4) starting a reactor, leading the sulfate wastewater to the cathode reaction zone of the reactor, and enabling the sulfate wastewater to flow out of the reactor after flowing inside the anode reaction zone through the buffer zone. By adopting the method, control of an S<2->oxidization process is achieved when the reduction speed of the sulfate reducing bacteria for reducing SO4<-2> is improved. Thus, the yield of S produced by biological metabolism of the wastewater is improved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a resource treatment method for sulfate waste water, which uses a cathode electric field to electrocatalyze the growth of sulfate-reducing bacteria and uses an anode electric field to control the oxidation degree of sulfide. Background technique [0002] With the development of industry and agriculture, chemical industry, pharmacy, tanning, papermaking, fermentation, food processing, mining and other fields discharge a large amount of industrial wastewater containing high concentration of sulfate in the production process, which has caused great harm to the ecological environment and human health. harm. Microbial desulfurization technology based on sulfate-reducing bacteria (SRB) is a pollution control technology developed in recent years. After years of research, biological desulfurization technology has made great progress, but there are still some pro...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34
Inventor 曹宏斌盛宇星李玉平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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