A Membrane Bioreactor with Stable Online Cleaning

Abstract

The invention provides a stable online washing type membrane bioreactor, which is applicable to stable physical washing in an operation process of aerobic, anaerobic and dynamic membrane bioreactors.The stable online washing type membrane bioreactor is characterized by being provided with a pipeline system, an electromagnetic dirt cleaning system and a membrane filtering system, wherein the pipeline system is composed of a water outlet pipe I, a water outlet pipe II and a three-way connector; an electromagnetic power system is composed of a stator cable rapid connector, a stator winding coil,a membrane brush guide rod, a promoter winding coil, a membrane brush and a promoter cable rapid connector; the membrane filtering system is composed of a membrane fixing block I, a membrane and a membrane fixing block II; the electromagnetic power system is used for directly converting electric energy into mechanical energy and can be used for stably pushing the membrane brush to do reciprocating motion along the membrane brush guide rod to brush the membrane, so that online washing of the membrane bioreactor is realized. The stable online washing type membrane bioreactor is not provided with a mechanical driving structure so that mechanical corrosion does not exist; the electromagnetic power system is used for directly converting the electromagnetic energy into the mechanical energy sothat the energy consumption is reduced; the stable online washing type membrane bioreactor has a simple whole structure and can be fully automatically operated.

Description

technical field [0001] The invention relates to the field of water treatment using electromagnetic technology to realize stable online cleaning of membrane bioreactors, in particular to a stable online cleaning membrane bioreactor. Background technique [0002] Direct discharge of sewage in production and life will lead to environmental pollution and waste of water resources. How to treat the sewage problem economically and effectively is particularly important, and finding high-efficiency and low-consumption sewage treatment technology has become a very valuable research topic. Membrane bioreactor is a water treatment technology that integrates biological treatment process and membrane separation process. Compared with traditional biological treatment technology, membrane treatment technology has more significant advantages. This technology has been used in the sewage treatment industry and plays an important role in it. effect. [0003] From the perspective of the develo...

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Problems solved by technology

[0003] From the perspective of the development of domestic membrane sewage treatment equipment, the current domestic mainstream membrane treatment equipment is mainly based on fiber membranes, supplemented by ceramic membranes. However, during the long-term use of the two types of membranes, microorganisms tend to adhere to the membrane surface and cause the membrane to be polluted. The time to maintain normal membrane flux is short. If you want to restore the membrane flux, you must take out the membrane module for manual cleaning, which seriously affects the efficiency of sewage treatment.

For this phenomenon, most membrane bioreactors are equipped with online cleaning devices. However, many domestic membrane modules configured for online cleaning mostly rely on the cross-flow generated by aeration to flush the fouling layer on the membrane surface, which is incomplete. , because no matter how high the cross-flow velocity (average velocity) is, there will always be a stagnant layer where the fluid flow velocity is zero or nearly equal to zero near the membrane surface, and the fouling layer covering the membrane will always affect the membrane flux. recover

Even if some are equipped with relevant mechanical online cleaning devices, the membrane cannot be completely cleaned, because its mechanical structure is easy to corrode during work, and the energy consumption is large, which reduces the reliability of the entire membrane bioreactor.

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