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单词 Percolating filter
释义

Percolating filter

英语百科

Trickling filter

(重定向自Percolating filter)
A typical complete trickling filter system
Image 1. A schematic cross-section of the contact face of the bed of media in a trickling filter

A trickling filter is a type of wastewater treatment system first used by Dibden and Clowes It consists of a fixed bed of rocks, lava, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media. Aerobic conditions are maintained by splashing, diffusion, and either by forced air flowing through the bed or natural convection of air if the filter medium is porous.

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