Aeration system for liquid-filtration membrane module

Abstract

A pulse aeration system for an immersed membrane filtration system is provided. The aeration system includes a housing defining at least one chamber with a flow path structure with a first flow path portion extending downwardly downstream from an inlet, and a second flow path portion extending upwardly upstream from an outlet and downstream from the first flow path portion. A barrier is fluidically between the first and second flow path portions, having a barrier bottom positioned to permit a gas release event during which the gas is released up the second flow path portion from the first flow path portion to defoul membranes. A flow path aperture permits sludge in the flow path to fall therethrough, with an area between 2% and 12% of an area of the flow path at the barrier bottom.

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