Membrane bioreactor is a new water treatment technology that combines membrane separation unit with biological treatment unit. Reliable and efficient automatic control system can not only ensure the normal operation of membrane bioreactor, but also reduce its operating cost and extend membrane flux and membrane service life. Taking the membrane bioreactor sewage treatment system of Sichuan Science City Hospital as an example, this paper discusses the application of membrane bioreactor in treating hospital wastewater, and introduces the control strategy and control system suitable for membrane bioreactor. Membrane bioreactor is a new water treatment technology that combines membrane separation unit with biological treatment unit. This process combines the advantages of biochemical treatment and membrane separation technology, replaces the secondary sedimentation tank for solid-liquid separation, and has the advantages of high efficiency and energy saving, good and stable effluent quality, small land occupation, etc. Compared with traditional biochemical treatment, it has the advantages of high efficiency and energy saving, good and stable effluent quality, small land occupation, and the effluent quality is better than traditional biological treatment process. A major disadvantage of membrane bioreactor is that after a period of operation, the membrane will be polluted, resulting in a decrease in membrane flux, shortening the service life of the membrane, increasing operating costs, and thus limiting the promotion and use of membrane bioreactor technology. Therefore, controlling membrane pollution and maintaining a high membrane flux are important contents of membrane bioreactor process research. In addition to being closely related to factors such as membrane materials and hydraulic conditions, the operation mode, operation process, and operation parameters of the membrane bioreactor are important means to ensure membrane flux and the service life of the membrane.
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