A new type of anaerobic membrane electrobiological treatment process for low-strength organic wastewater

Abstract

The invention discloses a novel anaerobic membrane electrobiological treatment technology for low-strength organic wastewater. The novel anaerobic membrane electrobiological treatment technology comprises the following steps: loading a glass fiber membrane with cidified carbon nanotubes through vacuum suction filtration to prepare a microfiltering conductive membrane; with an upflow anaerobic sludge bed reactor as a main anaerobic biological treatment technology, horizontally placing a membrane bioreactor between a suspended sludge zone and a three-phase separation zone thereof to form an anaerobic-membrane integrated biological treatment technology; introducing the microfiltering conductive membrane as an electrode to form the novel anaerobic membrane electrobiological treatment technology. Regulation of parameters of a reaction device includes regulation of the hydraulic retention time, the temperature, the voltage and the like. By the novel anaerobic membrane electrobiological treatment technology, the following effects can be achieved: the conductive membrane simultaneously plays roles of membrane interception and a membrane electrode, the effluent water quality is enhanced, the methane yield is increased, membrane pollution is simultaneously relieved in situ, and the service life of the conductive membrane is prolonged. The anaerobic membrane electrobiological treatment technology has the advantages of low investment cost, small floor area, simple operation, remarkable improving effect and the like, and can be applied to treatment of low-strength organic wastewater such as urban domestic sewage.

Description

technical field

[0001] The invention relates to an anaerobic biological treatment process for urban domestic sewage. Background technique

[0002] Urban domestic sewage generally adopts aerobic biological treatment process, which has high power consumption. The anaerobic biological treatment technology represented by the above flow anaerobic sludge bed reactor, because of its strong impact load resistance, low energy consumption, low residual sludge output, biogas production (mainly composed of methane and carbon dioxide), and operation Convenient and other features, more and more people apply it to the treatment of urban domestic sewage.

[0003] In theory, anaerobic biological treatment technology is more suitable for treating medium and high-strength organic wastewater, while the chemical oxygen demand of urban domestic sewage is generally 300-500mg / L, which belongs to low-strength organic wastewater. Therefore, in order to enhance the anaerobic biological treatment eff...

Images