Membrane filtration coupled single-chamber inclined plate multi-anode residual sludge microbial fuel cell device

Abstract

The invention provides an apparatus for realizing surplus sludge disposal and membrane filtration through a coupled single-chamber inclined-plate multi-positive-electrode microbial fuel cell, and belongs to the technical field of environmental engineering. Anaerobic zone sludge is arranged at the bottom of the apparatus; a carbon felt positive electrode is arranged in the anaerobic zone sludge; inclined-plate positive electrodes are arranged in the middle part; the carbon felt positive electrode and the inclined-plate positive electrodes are connected through wires to form the multiple positive electrodes; a carbon felt negative electrode is suspended in a supernatant liquor; the upper layer is exposed in the air to be used as an air negative electrode; the positive electrodes and the air negative electrode are connected through an external electric wire, and are connected with an external resistor; and a hollow fiber membrane module is arranged in the supernatant liquor close to the position of the negative electrode. Due to the additional inclined-plate positive electrodes of the cell, the positive electrode area can be enlarged, so that rich organic matters in the middle of a sedimentation basin can be fully utilized to improve power generation efficiency, effectively prevent sludge from floating upwardly, and slow down membrane pollution; positive-electrode electricity-generating bacteria can utilize the organic matters in the middle and at the bottom of the sedimentation basin, so that the surplus sludge in the sedimentation basin can be reduced while extra electric energy can be generated as well; and therefore, the cost for disposing, conveying and landfilling of the surplus sludge can be lowered, and the generated electric energy can be stored and utilized.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, relates to excess sludge treatment and reclaimed water reuse technology, in particular to the application of a single-chamber slanted plate multi-anode microbial fuel cell to simultaneously realize sludge reduction and energy recovery, and complete membrane filtration of excess sludge Sludge and sewage treatment methods. Background technique [0002] At present, more than 90% of urban sewage treatment plants in the world use activated sludge method or biofilm method, and a large amount of excess sludge is generated during the treatment process. The usual practice of treating sludge in existing sewage treatment plants is to concentrate, dehydrate and stabilize before using it for reclamation, incineration or land use. However, the sewage treatment plant has a large amount of sludge, high moisture content, complex composition and perishability. The sludge treatment process requir...

AI Technical Summary

Problems solved by technology

[0005] The effluent quality of the secondary sedimentation tank usually cannot meet the first-level A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002), and the urban sewage treatment plant needs to set up an advanced treatment process

Membrane filtration technology can provide reliable and excellent effluent quality, but membrane fouling will reduce water production efficiency and increase operational complexity

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