Wastewater treatment process
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United States of America Patent
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-
Sep 11, 1990
Issued Date -
N/A
app pub date -
Apr 6, 1988
filing date -
Aug 22, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wastewater treatment system in which biologically active particulate material mixed with wastewater is recirculated under turbulent conditions. The biomass is maintained at high concentration, and recirculation of the particles maintains the biological layer on the particles at a more active and efficient state would be the case without such recirculation. The system is particularly efficient, especially when the organic waste materials are slowly or relatively non-biodegradable, when the particulate material is adsorbtive (as, for example are particles of activated carbon) and the recirculation system includes an ultrafilter. When combined with a pretreatment of either alum or ferric chloride with lime, the system is particularly suited for efficient and effective treatment of dairy wastes.
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Cited Art Landscape
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