Liquid purification or separation – Flow – fluid pressure or material level – responsive – Proportionate feed means
Patent
1988-09-16
1990-01-16
Fisher, Richard V.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Proportionate feed means
210169, 210220, 210253, 210258, 210260, 210264, 210266, 210290, 2104162, 210437, B01D 2702
Patent
active
048941492
ABSTRACT:
A filtration device is disclosed comprising an assembly of three concentric tubular members in longitudinal upright position, having a closure wall at each end, the inner and middle tubular members being perforated over substantially their entire length to permit water flow therethrough, and the outer tubular member being substantially solid over its entire length. An inlet is connected to the inner tubular member at each end, and an outlet is connected to the outer tubular member. The space between the inner tubular member and the middle tubular member is a filtration chamber containing a filtration medium. A dividing device is laterally positioned in the inner tubular member dividing it into upper and lower non-communicating portions, and a dividing device is also laterally positioned in the filtration chamber dividing it into upper and lower non-communicating filtration chambers. The filtration medium is adapted to not pass through the perforations of the inner and middle tubular members. Additional dividing devices may be located in the upper and lower filtration chambers, in order to divide them into chambers of a size approximately 1 cubic foot. The filtration device of the invention is especially useful as a biological filter used in aquaculture systems, and as a pre-biological filter for removal of suspended matter.
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Fisher Richard V.
Millard Wanda L.
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