Plastic media filter

Details Plastic media filter Plastic media filter

1994-04-15

1995-10-17

Hruskoci, Peter A.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210793, 210794, B01D 2412

Patent

active

054587883

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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