Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 8, Issue 3, 2006; Page No.(405-411)

MICROBIAL REACTION KINETICS FOR CORRELATING FIRST PHASE ANAEROBIC REACTIONS IN LABORATORY AND PILOT SCALE DIGESTERS

B.F.BASNAYAKE,C VISVANATHAN,R.M.WIMALAWEERA AND N.R.C.MANNAPPERUMA

Abstract

Sustainable managennot of so/id wane should be dm basis for research a systeer that could combine anaerobic and aerobic digestion processes. Three laboratory scale snl id otate anaerobic reaelOrS made of PVC pipe of 200 nun diameter with a volume of 32 liters was used for the experiments. Throe results were compared with 500-liter pilot scale anaerobic digeoters. The resu Its showed that optimising the prof,. conditions in the first phase of anaerobicdigestion cook? be achieved using logistical growth kinetics to compare laboratory level experiments with that of pilot scale plants. The downward movement of elute with stabilization of 7-7 5 days and subartquent feeding al 1-day Mterva Is at maximum substrate utilization rate was optimum for continuous opera lions of the first phase. In batch operations. the dotty extraction of elutes as opposed to 7.. day extraction in COD stripping and rod ucod the percentage of ammonia production with higher !cycle( (rani waetes. Higher frequency of re-circulation incmased ertryme and microbial odationithips bidirated the optimum densities that would be suitable forland arid would pneride the baats of a aciennfic explanation fordifferegees solidphase reactions.

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