Method and device for retarding membrane pollution in membrane water treatment

Abstract

The invention relates to a method and a device for retarding membrane pollution in membrane water treatment. A shell with a membrane component is filled with a certain quantity of active carbon particles with certain particle size. In order to ensure the effect, the shell needs to be vertically installed; the volume of the active carbon particles accounts for about 30%-60% of that of a gap of the shell; the active carbon particles are fluidized in the shell of the membrane component through power of a circulating pump; the membrane surface is scrubbed continuously, so that pollutants are prevented from forming a filter cake layer on the membrane surface; the resistance of a filter cake layer of the membrane is retarded; dissolved organic matters in water are partially adsorbed by virtue of the adsorption capacity of the active carbon particles; blockage for membrane pores is retarded; and the blocking resistance of the membrane pores is retarded. The device comprises a filter shell and the membrane component; the shell is filled with a certain quantity of active carbon particles; a circulating pump is arranged on the shell and used for providing power for fluidization of the active carbon particles, so that the membrane surface is effectively scrubbed, the filter cycle of the membrane is prolonged and the operation cost is lowered further.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and device for alleviating membrane fouling in membrane water treatment. Background technique [0002] Membrane technology began to be applied in the field of water treatment in the 1960s, but it has become one of the most promising technologies in the field of water treatment. Use effective means (Membrane bioreactor, MBR). In particular, microfiltration membranes (Microfiltration, MF) and ultrafiltration membranes (Ultrafiltration, UF) operated at low pressure are the mainstream products of membrane technology in water treatment applications in recent years. MF and UF have advantages in the comprehensive comparison of economy, operability and treatment effect, and are the most widely used. [0003] Although membrane separation technology has many advantages that other water treatment processes cannot match, membrane fouling is a key problem that hinders the popularizat...

AI Technical Summary

Problems solved by technology

[0003] Although membrane separation technology has many advantages that other water treatment processes cannot match, membrane fouling is a key problem that hinders the popularization of membrane technology applications.

Membrane fouling will cause a decrease in flux or an increase in membrane pressure difference, resulting in increased operating costs and water production costs

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