Improving the biodegradability of grain distillery wastewater for use as UASB substrate by combinations of ozonation/enzymatic pre-treatments.
The effect of ozonation and enzyme combination pre-treatments on the composition of grain distillery wastewater (GDWW) was investigated. Exposure of UASB granules to these pre-treated GDWW was evaluated by determining the effect on granule activity, visual appearance and lipid content of the granules. Pre-treatments involving a pre-ozonation step were found to be more effective in reducing the lipid and COD content of GDWW. The higher the lipid and COD reduction achieved by the pre-treatments the higher the granule activity after 24 d exposure, the lower the lipid content in the granule and the less severe the formation of an encapsulating layer.
Sigge
G O
GO
Department of Food Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa. gos@sun.ac.za
Gie
L-M
LM
Britz
T J
TJ
D000434:Alcoholic Beverages; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002523:Edible Grain; D004798:Enzymes / Q000494:pharmacology; D008055:Lipids; D016877:Oxidants / Q000494:pharmacology*; D010126:Ozone / Q000494:pharmacology*; D014865:Waste Disposal, Fluid / Q000379:methods*
D004798:Enzymes; D008055:Lipids; D016877:Oxidants; D010126:Ozone