Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5144734 | Ultrasonics Sonochemistry | 2017 | 22 Pages |
Abstract
In our previous studies, enhanced methane (CH4) production using low-strength ultrasonication was achieved and the results were evidenced by physico-chemical and molecular biological approaches. As a final continuation study, the effects of low-strength ultrasonication on the activities of hydrolytic enzymes (amylase, cellulase, and protease) were investigated on methanogenic granules given that hydrolysis regulates the whole anaerobic digestion (AD) process. Up to 213% enhanced hydrolytic enzyme activities were observed, and they seem to be highly related to the enhanced CH4 production. However, the effects of ultrasonication on the distribution (liquid- and solid-phases) of hydrolytic enzymes were negligible. Enzymatic activation by low-strength ultrasonication was hypothetically caused by acoustic streaming, presumably enabling to overcome the masking effect, substrate inhibition and spatial constraint.
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Authors
Si-Kyung Cho, Yeo-Myeong Yun, Seung Gu Shin,