Abstract
This paper presents a study of effects of low power ultrasonication on anaerobic digestion of sludge. Based on the optimizing tests, large lab scale experiments were implemented to investigate impact of different dosage of ultrasonication on a sludge anaerobic process. Hydrolysis capacity of sludge for protein, cellulose and fat, pH, content of coenzyme F420 and daily yield of biogas were detected to observe changes of the main biochemical steps. The underlying mechanisms for the enhancement of sludge digestion efficiency by low power ultrasonication are also discussed.
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