Liquid purification or separation – Processes – Treatment by living organism
Patent
1980-08-14
1981-09-29
Wyse, Thomas G.
Liquid purification or separation
Processes
Treatment by living organism
210624, 210631, 210694, C02F 308
Patent
active
042921767
ABSTRACT:
Disclosed is a process for treating waste water through the use of activated carbon. The carbon is generally added to waste water having a pH from about 4 to about 11, and is commonly added after the waste water has undergone primary treatment. Preferred modes of operation comprise using low concentrations of activated carbon having a high surface area and a zeta potential greater than about -10 millivolts. It is also preferred to use activated carbon in conjunction with an activated sludge process having an average sludge age greater than about ten days, especially where the waste water undergoes a pretreatment prior to the activated sludge process to reduce chemical oxygen demand, oil and solids content. Low concentrations of activated carbon based on feed waste water are generally used while maintaining substantially higher carbon concentrations in the process.
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Rizzo, "Case History: Use of Powdered Activated Carbon in an Activated Sludge System", Proc. of Open Forum on Management of Petroleum Refinery Wastewaters.
Grieves et al., "Powdered Activated Carbon Enhancement of Activated Sludge for BA7 Refinery Wastewater Treatment", presented at Joint EPA-API-NPRA-U7 Second Open Forum on Management of Petroleum Refinery Wastewater, Jun. 1977.
Grutsch James F.
Mallatt Russell C.
Magidson William H.
McClain William T.
Sroka Frank J.
Standard Oil Company (Indiana)
Wyse Thomas G.
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