TITLE

Biological Solids Reduction Using the Cannibal Process

AUTHOR(S)
Novak, John T.; Chon, Dong H.; Curtis, Betty‐Ann; Doyle, Mike
PUB. DATE
November 2007
SOURCE
Water Environment Research (10614303);Nov2007, Vol. 79 Issue 12, p2380
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A laboratory study of the Cannibal process was undertaken to determine if the Cannibal system would generate less sludge compared with a conventional activated sludge system. Side‐by‐side sequencing batch reactors were operated—one using the Cannibal configuration and the other as conventional activated sludge. It was found that the Cannibal process generated 60% less solids than the conventional activated sludge system, without any negative effect on the effluent quality or the settling characteristics of the activated sludge. The oxygen uptake rate for the centrate from the Cannibal bioreactor showed that readily biodegradable organic matter was released from the recycled biomass in the Cannibal bioreactor. It is proposed that the mechanism for reduced solids from the Cannibal system is that, in the Cannibal bioreactor, iron is reduced, releasing iron‐bound organic material into solution. When the Cannibal biomass is recirculated back to the aeration basin, the released organic material is rapidly degraded.
ACCESSION #
133790627

 

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