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Method of synchronously degrading excess sludge and treating hexavalent chromium wastewater

A technology for excess sludge and hexavalent chromium, applied in biological sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high treatment cost

Inactive Publication Date: 2016-02-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of high processing cost in the existing method of using microbial fuel cells to treat residual pollutants, and provides a method for synchronously degrading excess sludge and treating hexavalent chromium wastewater

Method used

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  • Method of synchronously degrading excess sludge and treating hexavalent chromium wastewater
  • Method of synchronously degrading excess sludge and treating hexavalent chromium wastewater
  • Method of synchronously degrading excess sludge and treating hexavalent chromium wastewater

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specific Embodiment approach

[0011] Specific embodiments: a method for synchronously degrading excess sludge and treating hexavalent chromium wastewater according to the present embodiment is carried out in the following steps:

[0012] 1. Build a double-cell structure reactor: the double-cell structure reactor is composed of a shell 1, a cation exchange membrane 2, a carbon fiber brush 3, a reference electrode 4 and a stirrer 5, and the cation exchange membrane 2 is set in the shell 1. Housing 1 is divided into anode chamber 1-1 and cathode chamber 1-2, the carbon fiber brush 3 that is arranged in the anode chamber 1-1 is an anode, the carbon fiber brush 3 that is arranged in the cathode chamber 1-2 is a cathode, in the anode chamber 1-1 and the bottom of the cathode chamber 1-2 are respectively provided with a sampling tube 1-3, and the top of the anode chamber is provided with a gas collector 1-4; the anode and the cathode are connected through an external circuit; the reference electrode 4 penetrates i...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the composition and proportioning ratio of the nutrient solution in step two are as shown in Table 1:

[0016] The composition and proportioning ratio of table 1 nutrient solution

[0017]

[0018]

[0019] Others are the same as the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment three: what this embodiment is different from specific embodiment one or two is that potassium ferricyanide catholyte is according to potassium ferricyanide (K 3 [Fe(CN) 6 ] concentration of 30 ~ 35g / L, potassium dihydrogen phosphate (KH 2 PO 4 ) with a concentration of 25-30 g / L, which is prepared by adding potassium ferricyanide and potassium dihydrogen phosphate into water; the others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method of synchronously degrading excess sludge and treating hexavalent chromium wastewater, and relates to a method of recycling the excess sludge and treating the chromium-containing wastewater. The invention aims to solve the problem that the current treatment cost for treating excess pollutants is high by utilizing microbial fuel cells. The method comprises the steps of 1, setting up a double-cell-structure reactor; 2, adding the excess sludge and nutrient solutions into an anode chamber of the reactor, adding potassium ferricyanidecatholyte into a cathode chamber, and performing cultivation, wherein when the voltage output is greater than 0.6 V, starting is successful; 3, adding the excess sludge and the nutrient solutions to be treated into the anode chamber, adding the hexavalent chromium wastewater to be treated into the cathode chamber, and performing treatment, wherein a treatment period of the excess sludge is 40 to 50 days, the degradation rate of the excess sludge can reach 38 percent to 62 percent, a reduction period of the hexavalent chromium wastewater is 2 to 10 days, the degradation rate of hexavalent chromium can reach 66.4 percent to 93.2 percent, and the purpose of synchronously degrading the excess sludge and treating the hexavalent chromium wastewater is realized.

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells, and in particular relates to a method for realizing resource utilization of surplus sludge, reduction of chromium-containing wastewater and synchronous power generation. Background technique [0002] Biomass energy is the only renewable energy that can fix carbon. Its high-efficiency conversion and clean utilization have attracted increasing attention from all over the world. Many countries have identified biomass energy as the goal of future energy development. Aiming at the problems of global energy shortage, high energy consumption and long hydraulic retention time in the traditional sewage / sludge treatment and disposal process, by introducing microbial fuel cell technology, the chemical energy in the pollutants can be converted into electrical energy while treating the remaining pollutants Recycling to realize the resource utilization and energy utilization of pollutants. Microb...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F1/46H01M8/16C02F103/16C02F103/24C02F101/20
CPCY02E60/50
Inventor 赵庆良于航马闯徐鹏董全胜王朋英姜珺秋张云澍
Owner HARBIN INST OF TECH
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