Plastic media filter

Details Plastic media filter Plastic media filter

1993-03-01

1994-09-27

Hruskoci, Peter A.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

210121, 210136, 210138, 210143, 210151, 210266, 210275, 210277, 210290, B01D 2446

Patent

active

053505050

ABSTRACT:
A filter for removal of biochemical oxygen demand and suspended solids utilizing multi-layer filtration media. The filter media includes plastic particles, sand, and garnet and is operated under an automatic control condition. Fine filtering is accomplished by a sludge cake which develops at the upstream face of the filter media. For cleaning the filtration media, deposited sludge is removed from the filter bed by backwashing in a short time period at a high strength backwash flow rate.

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