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Microbial fuel cell taking straws and sludge as matrixes, construction method and sludge treatment method

A technology of fuel cell and construction method, applied in the direction of biological sludge treatment, biochemical fuel cell, etc., can solve the problems of poor sludge treatment effect, achieve the effects of reduced incineration energy consumption, easy transportation and handling, and improved processing capacity

Active Publication Date: 2020-02-28
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of poor sludge treatment effect in the prior art, the present invention provides a microbial fuel cell, comprising an anode chamber based on a mixture of straw and sludge, a cathode chamber based on sludge, and a proton exchange membrane. The sludge produced by sewage treatment and the bottom sludge of black and odorous water have a high content of organic matter. Using straw to improve the physical and chemical characteristics of sludge solves the problems of poor sludge treatment effect and improves the electricity production efficiency of traditional microbial fuel cells.

Method used

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  • Microbial fuel cell taking straws and sludge as matrixes, construction method and sludge treatment method

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Effect test

Embodiment 1

[0032]A straw and sludge-based microbial fuel cell of the present invention, as shown in FIG. 2 , includes an anode chamber 200 , a cathode chamber 300 , a proton exchange membrane 400 and a circuit system 500 . The matrix of the anode chamber 200 is a stirred mixture of straw and sludge with a mass ratio of 0.5-2:1, which is used to provide acceptors for bacteria to transfer electrons. The matrix of the cathode chamber 300 is sludge, which is used to receive electrons and form an electric current through an external circuit. The stalks used in the anode chamber 200 are strip-shaped hollow plant stalks, and the silt used in the anode chamber 200 and the cathode chamber 300 has a water content of 60% to 98%. The invention does not need to control the temperature, pH and water content, and the straw and the sludge have a mass ratio relationship, and it is enough to stir evenly. It is worth noting that the volume ratio of the anode chamber 200 and the cathode chamber 300 is 2-5:...

Embodiment 2

[0073] The basic content of this embodiment is the same as that of Embodiment 1, the difference lies in the adjustment of actual application parameters. For example, during the dredging project of a black and odorous river course in a certain city, about 100t of silt was urgently needed to be disposed of (with a density of approximately 1t / m 3 ), the water content of the silt is 90%, and the regional water environment quality standard must meet the Class IV water standard in the "National Surface Water Quality Standard" (GB3838-2002). In addition, the depth of the groundwater in the area reaches 3m (the groundwater level is low), so this project prevents the seepage of groundwater, and the height of the microbial fuel cell is set at 2m.

[0074] Calculate the size of the microbial fuel cell in terms of 20m 3 As a unit sludge disposal device, it is divided into 5 groups.

[0075] Ratio of main parameters: aspect ratio 2:1, anode chamber 200 volume and cathode chamber 300 volu...

Embodiment 3

[0086] The basic content of this embodiment is the same as that of Embodiment 1, the difference lies in the adjustment of actual application parameters. For example, in a city’s black and odorous river improvement project, about 150 tons of silt was urgently needed to be disposed of during the dredging project (with a density of approximately 1t / m 3 ), the water content of the silt is 90%, and the regional water environment quality standard must meet the Class IV water standard in the "National Surface Water Quality Standard" (GB3838-2002). In addition, the depth of groundwater in the area reaches 6m, so this project prevents the seepage of groundwater, and the height of the microbial fuel cell is set at 5m.

[0087] Calculate the size of the microbial fuel cell in terms of 30m 3 As a unit sludge disposal device, it is divided into 5 groups.

[0088] Ratio of main parameters: aspect ratio 3:1, anode chamber 200 volume and cathode chamber 300 volume ratio 3:1.

[0089] Thus ...

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Abstract

The invention discloses a microbial fuel cell taking straw and sludge as matrixes, a construction method and a sludge treatment method, and belongs to the field of environmental engineering. The microbial fuel cell comprises a filter wetland, an anode chamber, a cathode chamber, a proton exchange membrane and a circuit system. The anode chamber and the cathode chamber are isolated by the proton exchange membrane. A current generated by proton exchange is stored in the circuit system. Effluent obtained after purification of the microbial fuel cell is discharged under the action of the filter wetland. The matrix of the anode chamber is a straw and sludge stirring mixture, and the matrix of the cathode chamber is sludge. The novel microbial fuel cell is integrally formed by considering the chemical characteristics of straw and sludge and the action characteristics of microbial fuel cells. Organic matters in sludge are removed, the water content of sludge is reduced, and the power generation efficiency of microbial fuel cells is improved. An environment-friendly building is achieved. The novel microbial fuel cell has the advantages of simple structure, reasonable design and convenienceof dredging.

Description

technical field [0001] The invention belongs to the field of environmental engineering construction, and more specifically relates to a microbial fuel cell based on straw and silt, a construction method thereof, and a sludge treatment method. Background technique [0002] According to the "Implementation Plan for Urban Black and Odorous Water Treatment" jointly issued by the Ministry of Housing and Urban-Rural Development and the Ministry of Ecology and Environment, by the end of 2019, the proportion of black and odorous water bodies in the built-up areas of other prefecture-level cities will be significantly increased, reaching more than 90% by the end of 2020. A large amount of silt is produced in the dredging project of black and odorous water body improvement, which has become one of the pain points of the water environment improvement project. Sludge is a by-product of urban municipal drainage systems, mainly from urban drainage systems, including sludge from drainage p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16C02F11/04
CPCC02F11/04H01M8/16Y02E60/50
Inventor 邢立群孔明王力超李爱民
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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