Liquid purification or separation – Processes – Separating
Patent
1993-02-16
1995-01-03
Dawson, Robert A.
Liquid purification or separation
Processes
Separating
210787, 210208, 210295, 4DIG19, B01D 2446
Patent
active
053783751
ABSTRACT:
A washing apparatus for washing solid fractions such as screenings or grit derived from a sewage treatment plant and contaminated with fecal material, such as fecal solids, includes a tank (11/111) for receiving aqueous liquid and the contaminated solid fractions, and mechanisms (23, 26, 126) for generating turbulence of the aqueous liquid in the tank to break-down the fecal contaminants. The method of washing screenings includes adding aqueous liquid and screenings contaminated with fecal material to a tank, subjecting the liquid containing contaminated screenings to turbulence to break down the fecal material and adding further liquid alone or containing screenings to the tank such that screenings and aqueous liquid containing finely divided fecal material flow from the tank over a weir or the like for dewatering and compaction of the screenings.
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Dawson Robert A.
Fortuna Ana M.
Jones & Attwood Limited
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