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Microbial electrochemical reactor and method for fixing carbon dioxide in waste gas to generate organic products while treating sewage

A microbial electrochemical and simultaneous treatment technology, applied in chemical instruments and methods, biological water/sewage treatment, electrolytic organic production, etc., can solve practical limitations and other problems, and achieve the effect of reducing electric energy

Active Publication Date: 2018-04-27
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses a microbial reactor to efficiently fix CO with only a small amount of electrical energy 2 , but because it is only suitable for high concentrations of CO in an anaerobic environment 2 , and the product is a mixture of various gaseous and liquid organic compounds, so the practicability is limited

Method used

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  • Microbial electrochemical reactor and method for fixing carbon dioxide in waste gas to generate organic products while treating sewage
  • Microbial electrochemical reactor and method for fixing carbon dioxide in waste gas to generate organic products while treating sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The water entering the anode chamber is domestic sewage with a COD concentration of 1000mg / L. The carbon dioxide chamber uses Cu with a modification temperature of 300°C and a time of 10h 2 O electrode, run stably for 5 days according to the above method, regularly collect water samples and culture solution to analyze COD degradation and organic synthesis, and replace waste water with the same concentration regularly according to COD degradation, and run 5 batches in total. Results: The effluent COD decreased to 30-60 mg / l, the synthesis amount of isobutanol was 400-450 mg / l, and the synthesis amount of 3-methyl-1-butanol was 200-250 mg / l.

Embodiment 2

[0061] The water entering the anode chamber is domestic sewage with a COD concentration of 1000mg / L, and the carbon dioxide chamber uses Cu at a temperature of 300°C for 12 hours. 2 O electrode, run stably for 5 days according to the above method, regularly collect water samples and culture solution to analyze COD degradation and organic synthesis, and replace waste water with the same concentration regularly according to COD degradation, and run 5 batches in total. Results: The effluent COD decreased to 15-30 mg / l, the synthesis amount of isobutanol was 500-600 mg / l, and the synthesis amount of 3-methyl-1-butanol was 300-400 mg / l.

Embodiment 3

[0063] The water entering the anode chamber is domestic sewage with a COD concentration of 1000mg / L, and the carbon dioxide chamber uses Cu at a temperature of 300°C for 18 hours. 2 O electrode, run stably for 5 days according to the above method, regularly collect water samples and culture solution to analyze COD degradation and organic synthesis, and replace waste water with the same concentration regularly according to COD degradation, and run 5 batches in total. Results: The COD effluent of wastewater decreased to 15-30 mg / l, the synthesis amount of isobutanol was 400-500 mg / l, and the synthesis amount of 3-methyl-1-butanol was 250-300 mg / l.

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Abstract

The invention discloses a microbial electrochemical reactor for fixing carbon dioxide in exhaust gas to generate organic products and simultaneously processing sewage and a method thereof. The microbial electrochemical reactor comprises a microbial electrogenesis room, a microbial synthesis room and a CO2 fixation room which are arranged successively. The microbial electrochemical reactor also comprises a cation exchange membrane arranged between the microbial electrogenesis room and the microbial synthesis room and an anion exchange membrane arranged between the microbial synthesis room and the CO2 fixation room. The microbial electrochemical reactor also comprises a microbial electrogenesis electrode, a microbial synthesis electrode and a Cu2O electrode which are correspondingly arranged inside the microbial electrogenesis room, the microbial synthesis room and the CO2 fixation room, wherein the microbial electrogenesis electrode and the microbial synthesis electrode form a circuit, and the microbial electrogenesis electrode and the Cu2O electrode form a circuit. The microbial electrochemical reactor also comprises an air pump connected to the CO2 fixation room and a pH online regulation device. According to the invention, carbon dioxide in industrial exhaust gas can be fixed to generate isobutanol and 3-methyl-1-butanol while sewage is degraded.

Description

technical field [0001] The present invention relates to electrochemical synthesis technology, microbial synthesis technology, waste and waste water recycling and energy utilization, in particular to a method of using a microbial electrochemical reactor to fix carbon dioxide in industrial waste gas to generate isobutanol and 3-methyl-1-butanol Alcohol simultaneously degrades the sewage method. Background technique [0002] At present, due to industrial production and the use of a large amount of fossil fuels, CO 2 are emitted in large quantities as greenhouse gases. And in the past two centuries, it has caused huge climate change, so the study of safe and environmentally friendly CO 2 Fixing technology is urgent. On the other hand, due to the depletion of fossil energy and the CO 2 is a potential carbon resource, for CO 2 Utilization is also a way to develop a sustainable society. [0003] The patent whose publication number is CN102343199A provides a kind of enhanced m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84B01D53/62C02F3/34C12P7/16
CPCC25B3/25C25B9/19
Inventor 顾源应贤斌冯华军周玉央李娜梁禹翔王炎峰沈东升
Owner ZHEJIANG GONGSHANG UNIVERSITY
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