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Microbial fuel cell based method for treatment and detection of chromium-containing electroplating wastewater

A fuel cell and treatment method technology, applied in biochemical fuel cells, biological water/sewage treatment, metallurgical wastewater treatment, etc., can solve the problems of toxic sludge, high energy consumption, high chemical reagents, etc., and achieve no pollution, easy removal, The effect of avoiding toxic effects

Inactive Publication Date: 2015-03-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although conventional metal removal techniques are very effective, they also have some disadvantages: high energy consumption, high chemical reagent consumption, and large amounts of toxic sludge

Method used

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  • Microbial fuel cell based method for treatment and detection of chromium-containing electroplating wastewater
  • Microbial fuel cell based method for treatment and detection of chromium-containing electroplating wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Inject 50ml of anaerobic sludge and 150ml of sodium acetate solution into the anode chamber of the dual-chamber microbial fuel cell to inoculate microorganisms, inject 200ml of catholyte into the cathode chamber, and connect a 1000Ω resistor to the anode and cathode to form a closed loop. The battery is kept at a constant temperature of 35°C React in the box, inject 80mg of sodium acetate into the anode chamber every day until the output voltage is stable at 240-260mV, the composition of the catholyte: KH 2 PO 4 13.60g / l, NaCl 11.70g / l, NaOH 2.33g / l;

[0035] Replace the anode chamber solution with 200ml anolyte that removes oxygen, replace the catholyte with chromium-containing electroplating wastewater, use graphite paper as the cathode material, and use carbon felt as the anode material. The composition of the anolyte: KH 2 PO 4 13.60g / l, CH 3 COONa is 1.00g / l, NaCl is 11.70g / l, NaOH is 1.164g / l, NH 4 Cl is 0.454g / l, MgCl 2 ·6H 2 O is 0.165g / l, FeCl 3 ·6H 2 O...

Embodiment 2

[0042] Inject 50ml of anaerobic sludge and 150ml of sodium acetate solution into the anode chamber of the dual-chamber microbial fuel cell to inoculate microorganisms, inject 200ml of catholyte into the cathode chamber, and connect a 1000Ω resistor to the anode and cathode to form a closed loop. The battery is kept at a constant temperature of 35°C React in the box, inject 80mg of sodium acetate into the anode chamber every day until the output voltage is stable at 240-260mV, the composition of the catholyte: KH 2 PO 4 13.60g / l, NaCl 11.70g / l, NaOH 2.33g / l;

[0043] Replace the anode chamber solution with 200ml of anolyte that removes oxygen, replace the catholyte with chromium-containing electroplating wastewater, use carbon felt as the cathode material, and use carbon felt as the anode material. The composition of the anolyte: KH 2 PO 4 13.60g / l, CH 3 COONa is 1.00g / l, NaCl is 11.70g / l, NaOH is 1.164g / l, NH 4 Cl is 0.454g / l, MgCl 2 ·6H 2 O is 0.165g / l, FeCl 3 ·6H 2 O...

Embodiment 3

[0050] Inject 50ml of anaerobic sludge and 150ml of sodium acetate solution into the anode chamber of the dual-chamber microbial fuel cell to inoculate microorganisms, inject 200ml of catholyte into the cathode chamber, and connect a 1000Ω resistor to the anode and cathode to form a closed loop. The battery is kept at a constant temperature of 35°C React in the box, inject 80mg of sodium acetate into the anode chamber every day until the output voltage is stable at 240-260mV, the composition of the catholyte: KH 2 PO 413.60g / l, NaCl 11.70g / l, NaOH 2.33g / l;

[0051] Replace the anode chamber solution with 200ml of anolyte that removes oxygen, replace the catholyte with chromium-containing electroplating wastewater, use carbon paper as the cathode material, and use carbon felt as the anode material. The composition of the anolyte: KH 2 PO 4 13.60g / l, CH 3 COONa is 1.00g / l, NaCl is 11.70g / l, NaOH is 1.164g / l, NH 4 Cl is 0.454g / l, MgCl 2 ·6H 2 O is 0.165g / l, FeCl 3 ·6H 2 O...

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Abstract

The invention discloses a microbial fuel cell based method for treatment and detection of chromium-containing electroplating wastewater. The steps include: 1) injecting anaerobic sludge and a sodium acetate solution into an anode chamber of a two-chambered microbial fuel cell to inoculate microorganisms, injecting a cathode liquid into a cathode chamber, and connecting resistance at the cathode and the anode to form a closed loop, reacting the cell in a thermotank, injecting sodium acetate into the anode chamber each day till the output voltage is stable; 2) changing the anode chamber solution to an oxygen removed anode liquid, and changing the cathode solution to chromium-containing wastewater; and 3) after starting, adjusting the pH value of wastewater, injecting the wastewater into the cathode chamber, connecting the external resistance and starting the treatment process. The method provided by the invention realizes no direct contact of microorganisms and hexavalent chromium, avoids poisoning of hexavalent chromium on microorganisms, and makes microbiological treatment of high concentration hexavalent chromium wastewater become possible. The standard redox potential of hexavalent chromium is 1.33V, the microbial fuel cell is utilized to treat hexavalent chromium wastewater, and the purposes of synchronous wastewater treatment and electric energy recovery are realized.

Description

technical field [0001] The invention relates to the technical field of microbial fuel cells, in particular to a treatment and detection method for chromium-containing electroplating wastewater based on microbial fuel cells. Background technique [0002] The wastewater containing heavy metals (such as cadmium, copper, chromium) produced by electroplating industry is one of the typical environmental pollution problems (Algarra, M.; Jime'nez, M.V.; Rodrl'guez-Castello'n, E.; Jime 'nez-Lo'pez, A.; Jime'nez-Jime'nez, J.. Chemosphere, 2005, 59, 779–86). Heavy metals, especially chromium, pose serious hazards to humans, animals and the environment. Hexavalent chromium is highly soluble and generally exists in the form of highly toxic anions, which are suspected to be carcinogenic and teratogenic. Hexavalent chromium accumulated in the living body through the food chain has caused many health problems. Concentrations of hexavalent chromium in drinking water exceeding 0.05 mg / l ar...

Claims

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Application Information

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IPC IPC(8): C02F3/34H01M8/16G01N21/31C02F101/22C02F103/16
CPCC02F3/005C02F3/34C02F3/348C02F2101/22C02F2103/16G01N21/31H01M8/16Y02E60/50
Inventor 雷乐成李中坚李飞芳包晗杨彬张兴旺
Owner ZHEJIANG UNIV
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