Apparatus for realizing surplus sludge disposal and membrane filtration through coupled single-chamber inclined-plate multi-positive-electrode microbial fuel cell

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, and relates to surplus sludge treatment and reclaimed water reuse technology, in particular to the application of a single-chamber inclined plate multi-anode microbial fuel cell to simultaneously realize sludge reduction and energy recovery, and complete membrane filtration of residual sludge Mud and sewage treatment methods. Background technique [0002] At present, more than 90% of the urban sewage treatment plants in the world adopt the activated sludge method or the biofilm method, and a large amount of excess sludge is produced during the treatment process. The common method of treating sludge in existing sewage treatment plants is to use it for reclamation, incineration or land use after being concentrated, dewatered and stabilized. However, the sewage treatment plant has a large amount of sludge, high water content, complex composition and perishable, high energy consumption ...

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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