TY - JOUR
T1 - Enhanced activity of methanogenic granules by low-strength ultrasonication
AU - Cho, Si Kyung
AU - Kim, Dong Hoon
AU - Kim, Moon Hwan
AU - Shin, Hang Sik
AU - Oh, Sae Eun
PY - 2012/9
Y1 - 2012/9
N2 - In this study, low-strength ultrasonication was applied at various ultrasonication densities (UDs) (0-0.1W/mL) and ultrasonication time (UT) (0-30min) to methanogenic granules on the purpose of increasing their activity, and eventually, enhancing the performance of upflow anaerobic sludge blanket reactor (UASBr). Batch test results showed that 5min of ultrasonication at 0.05W/mL was found to be the optimal conditions, resulting in the increase of dehydrogenase activity and adenosine triphosphate content by 257%, and 374%, respectively, compared to the control. These increments were confirmed by specific methanogenic activity test. When ultrasonication (UD 0.05W/mL, UT 5min) was irradiated every 8h during the continuous operation of UASBr, it caused a gradual drop of methanogenic activity, complete loss after 20days. At further operation, UT was decreased to 1s but irradiated every 1min, which resulted in a 43% higher specific CH4 production rate.
AB - In this study, low-strength ultrasonication was applied at various ultrasonication densities (UDs) (0-0.1W/mL) and ultrasonication time (UT) (0-30min) to methanogenic granules on the purpose of increasing their activity, and eventually, enhancing the performance of upflow anaerobic sludge blanket reactor (UASBr). Batch test results showed that 5min of ultrasonication at 0.05W/mL was found to be the optimal conditions, resulting in the increase of dehydrogenase activity and adenosine triphosphate content by 257%, and 374%, respectively, compared to the control. These increments were confirmed by specific methanogenic activity test. When ultrasonication (UD 0.05W/mL, UT 5min) was irradiated every 8h during the continuous operation of UASBr, it caused a gradual drop of methanogenic activity, complete loss after 20days. At further operation, UT was decreased to 1s but irradiated every 1min, which resulted in a 43% higher specific CH4 production rate.
KW - Adenosine triphosphate (ATP)
KW - Dehydrogenase activity (DHA)
KW - High rate anaerobic treatment system
KW - Low strength ultrasonication
KW - Upflow anaerobic sludge blanket reactor (UASBr)
UR - http://www.scopus.com/inward/record.url?scp=84863534274&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2012.06.046
DO - 10.1016/j.biortech.2012.06.046
M3 - Article
C2 - 22784957
AN - SCOPUS:84863534274
SN - 0960-8524
VL - 120
SP - 84
EP - 88
JO - Bioresource Technology
JF - Bioresource Technology
ER -