Quorum sensing quenching bacteria preparation method, MBR membrane pollution prevention and control method, and MBR membrane pollution prevention and control apparatus

Abstract

The invention provides a quorum sensing quenching bacteria preparation method, a MBR membrane pollution prevention and control method, and a MBR membrane pollution prevention and control apparatus. The preparation method comprises: preparing an alternative strain having N-hexanoyl-homoserine lactone AHL decomposition and utilization capability from active sludge or sewage sampled from a sewage treatment plant; verifying the quorum sensing quenching ability of the alternative strain to screen quorum sensing quenching bacteria; and verifying the anti-bio-film ability of the quorum sensing quenching bacteria to obtain the effective quorum sensing quenching bacteria. According to the present invention, the prepared quorum sensing quenching bacteria uses the pollutants in the sewage as the nutrition to decompose other microorganisms during the growth process to generate the signal molecules, such that the concentration of the AHL signal molecules produced by other microorganisms in the membrane pool cannot achieve the concentration threshold required by the quorum sensing and the signal loop conduction cannot be formed so as to inhibit the bio-film formation of the membrane pool microorganisms on the MBR membrane assembly surface and achieve the effects of pollution prevention and energy consumption saving.

Description

technical field [0001] The invention relates to the technical field of pollution prevention and control, in particular to a method for preparing quorum-sensing quenching bacteria, a method and a device for preventing and controlling MBR membrane pollution. Background technique [0002] In the field of sewage treatment and water resource reuse, membrane bioreactor (Membrane Bio-Reactor, referred to as MBR) is a new type of water treatment equipment that combines a membrane separation unit and a biological treatment unit. Due to the high-efficiency separation effect of the membrane, the separation effect is much better than that of the traditional sedimentation tank. The treated water is extremely clear, the suspended solids and turbidity are close to zero, and bacteria and viruses are greatly removed; at the same time, the membrane separation also completely intercepts the microorganisms in the biological In the reactor, the system can maintain a high microbial concentration,...

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Problems solved by technology

[0003] However, during the separation process, microorganisms in the membrane pool tend to grow on the conjunctiva on the surface of the membrane, causing pollution to the membrane, causing a decrease in flux or an increase in membrane pressure difference

Although some existing technologies can effectively slow down the degree of membrane fouling, they will either greatly increase energy consumption (air scrubbing technology), or need to add chemicals, increase operating costs and cause risks to normal operation, or need to modify or replace the membrane surface New film, high risk, high investment, difficult to promote

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