Liquid purification or separation – Processes – Chemical treatment
Patent
1994-11-14
1996-10-29
Popovics, Robert J.
Liquid purification or separation
Processes
Chemical treatment
210791, 210800, 210 86, 210407, 210472, 2105322, 210539, 210523, 1510405, 1510416, 1510431, B01D 3516
Patent
active
055693873
ABSTRACT:
A system for treating wastewater and improving the quality of wastewater effluent by preventing solids from being discharged in the effluent is disclosed. Wastewater having a concentration of waste solids flows into a wastewater collection container through a waste-water inlet and solids are allowed to distribute into a lower horizontal sludge layer and an upper horizontal scum layer with a horizontal layer of liquid therebetween. A substantially upstanding elongate tube is immersed in the wastewater within the container and the interior of the tube is exposed to the horizontal layer of liquid through a plurality of inclined slots in the tube. Liquid flows from the horizontal liquid layer through the slots into the interior of the tube and thereafter through a liquid effluent outlet of the container. Preferably, the slots extend vertically along a majority of the depth of the wastewater in the container. A cleaning implement is moved along the interior of the tube while the tube remains immersed in the wastewater within the container, thereby cleaning the tube without removing it from the wastewater container. The tube also provides overflow protection for the wastewater collection container, and a clog-resistant means of attenuating flow from the container. The tube can be removed from the wastewater collection container and its exterior surface can be inspected to determine if the container requires pumping.
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Excerpt from Manual "Alternative Wastewater Collection Systems," U.S. EPA, pp. 165-166, Oct. 1991.
Promotional material from Orenco Systems, Inc. "Effluent Filters", three pages Publication date-Aug. 1989.
Promotional material from Treit Equipment Company, one page Published as least as early as Sep. 1993.
Promotional material from Zabel Industries, Inc., three pages Published at least as early as Sep. 1993.
Sketch illustrating installation of Zabel 2, published Aug. 16, 1994.
Bowne William C.
Thorsby Gary L.
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