Anti-fouling and anti-blocking system of anaerobic membrane bioreactor

Abstract

The invention discloses an anti-fouling and anti-blocking system of an anaerobic membrane bioreactor, and belongs to the field of anaerobic processes. The device comprises a bioreactor, wherein a biological carrier is arranged in the bioreactor, a cathode and an anode are respectively arranged in the bioreactor, an external power supply and a sliding resistor are arranged outside the bioreactor, the external power supply, the sliding resistor, the cathode and the anode form a closed circuit, and a backwashing assembly is further arranged outside the bioreactor; a methane collecting device is further arranged outside the bioreactor, one end of the methane collecting device is communicated with a biogas reflux pump through a pipeline, the output end of the biogas reflux pump is communicated with a biogas reflux pipe, and one end of the biogas reflux pipe is communicated with a backwashing assembly which is further arranged outside the bioreactor. According to the anti-fouling and anti-blocking technology for the anaerobic bioreactor provided by the invention, membrane pollution in the bioreactor is relieved and the treatment efficiency of the bioreactor is improved by adding the biological carrier into the bioreactor and the like.

Description

technical field [0001] The invention relates to an anaerobic membrane bioreactor antifouling and blocking system, which belongs to the field of anaerobic technology and mainly provides a method for alleviating membrane pollution of anaerobic membrane bioreactors. Background technique [0002] Anaerobic membrane biological treatment technology is a sewage treatment technology that combines traditional anaerobic digestion with membrane filtration system. It has the advantages of recyclable and convenient operation. However, when the organic load is high, the concentration of extracellular polymeric substances (EPS) and soluble microbial products (SMP) in the system increases, causing the clogging of the filter membrane. [0003] Traditional effective methods to alleviate membrane fouling include optimizing operation mode and membrane cleaning and maintenance. By optimizing the operation mode, such as improving the system aeration mode, adjusting the aeration rate, and pretrea...

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Problems solved by technology

[0004] CN 111573782 A "Membrane pollution control method and device for water treatment equipment" adopts the combined cleaning method of backwashing and oscillating mechanical cleaning, and at the same time strengthens the agitation of the water body by stirring and air-water stirring, but because the backwashing and oscillating machinery can only clean the surface of the membrane pollution, unable to efficiently remove the pollutants clogged inside the membrane

[0005] CN111644070A "Reverse Osmosis Membrane Cleaning Agent for Reuse of Reclaimed Water" invented the method of cleaning with acidic cleaning agent and alkaline cleaning agent, and provided two cleaning agent formulas, but due to the need to add chemicals, it is easy to damage the membrane structure, and will Introduce new pollutants to treated wastewater

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