Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1979-04-27
1981-01-27
Sever, Frank
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210780, 210806, B01D 3704
Patent
active
042473950
ABSTRACT:
A tertiary sewage treatment process separates organic wastes from the liquid content of sewage. The process includes the steps of directing sewage onto a first disposable sheetlike filter from a system which periodically bulks. Solids of above a predetermined size are collected on the first disposable sheetlike filter. Solids of less than the predetermined size flow through the first disposable sheetlike filter. The level of the sewage pool on the first disposable sheetlike filter is sensed. The first disposable sheetlike filter is indexed when the pool level is above a predetermined amount to present a new portion of the first disposable sheetlike filter to the sewage pool and to move the used portion of the first disposable sheetlike filter to a storage area. The disposable sheetlike filter with the sewage layer thereon is periodically moved from the storage area. The material which is directed from the first disposable sheetlike filter is directed to a second disposable sheetlike filter, and all of the afore-mentioned steps are repeated with regard to the second disposable sheetlike filter. Substantially pure water is withdrawn from the second disposable sheetlike filter.
REFERENCES:
patent: 1160918 (1915-11-01), Linden
patent: 2665812 (1954-01-01), Crane
patent: 3489679 (1970-01-01), Davidson et al.
patent: 3915859 (1975-10-01), Sundin et al.
patent: 4137062 (1979-01-01), Mullerheim et al.
"Deep Bed Filtration"; Industrial Filters Co., 9 Industrial Rd., Fairfield, N.J.; (Bulletin); date ukn.
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