Liquid purification or separation – Processes – Treatment by living organism
Patent
1985-09-30
1986-12-02
Castel, Benoit
Liquid purification or separation
Processes
Treatment by living organism
210616, 210618, 210917, 210631, 48197A, 435167, C02F 328, C12P 502
Patent
active
046263543
ABSTRACT:
A process for treating high strength BOD containing liquors includes the step of mildly mixing and contacting the liquors with anaerobic bacteria and a powdered adsorbent support medium to remove a substantial portion of the organic matter and generate a methane fuel gas. Use of the powdered support medium at 0.1-20 g/l enables high removal of BOD in short treatment times, rapid clarification of treated liquors, and increased adsorbability of liquor color.
In a subsequent decolorizing embodiment, digested and clarified liquors are contacted with reduced concentrations of powdered color adsorbent to produce a treated liquor low in dissolved organic matter and color.
The spent streams of powdered adsorbent support medium-biomass and/or powdered color adsorbent are preferably regenerated and reused.
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Spencer, R. R. et al., "The Addition of Powdered Activated Carbon to Anaerobic Digesters--Effects on Methane Production", Battelle Laboratories Report No. BNWL-SA-5893, Jul. 1976.
Adams, Alan D., "Activated Carbon: Old Solution to Old Problem", Water & Sewage Works, Aug. 1975, pp. 46-48; and Sep. 1975, pp. 78-80.
Hunsicker, M. et al., "Powdered Activated Carbon Improves Anaerobic Digestion", Water & Sewage Works, pp. 62-63, Jul. 1976.
Carl M. Koch et al., "Wanted: More Gas, Less Sludge--Can PAC Help?", Water and Wastes Engineering, pp. 27-29, Jun. 1978.
DeBauche, J. Willard, Jr., "Research Report, Green Bay Metropolitan Sewerage District 1980-1982 Anaerobic Digestion of Heat Treatment Liquor", 1983.
Copa William M.
Hoffman Clarence A.
Mayer Michael R.
Castel Benoit
Erickson Allen H.
Zimpro Inc.
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