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Title: Bio-stimulation of anaerobic digestion by low intensity ultrasonication
Authors: Tyagi V.K.
Tien A.L.S.
Ahmed B.
Gautam A.
Published in: Water Science and Technology
Abstract: Low intensity ultrasonication (US) was used to stimulate the biological activities in anaerobic digestion (AD) process. The enhancement in CH4 production was used to evaluate the sono-biostimulation effects on the process performance. The 32% higher CH4 production was observed over control at best US intensity and irradiation time of 0.0028 W/mL and 120 sed, respectively. The sono-biostimulation effects in terms of higher CH4 generation over control lasted for 45 hr. The increase in the concentration of NH4 +-N and K+ considered the indication of cell lysis under applied US conditions. At best US intensity and irradiation time, the NH4 +-N and K+ fraction in the medium remained the same as of control, which indicated that no cell lysis occurred. These preliminary findings showed that low intensity US could be a promising solution to enhance the process efficiency in terms of higher methane production with minimal energy requirement.
Citation: Water Science and Technology(2019), 80(4): 659-664
Issue Date: 2019
Publisher: IWA Publishing
Keywords: Anaerobic digestion
Low intensity
ISSN: 2731223
Author Scopus IDs: 36776464800
Author Affiliations: Tyagi, V.K., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Tien, A.L.S., Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, Singapore, 637141, Singapore
Ahmed, B., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Gautam, A., ForSight VISION6, Inc., 1000 Marina Boulevard, Brisbane, CA 94005, United States
Funding Details: The authors are thankful to Department of Biotechnology-GoI (Grant No. BT/RLF/Re-entry/12/2016) for financial support to this research. We are also thankful to Prof. Yan Zhou for her valuable suggestions and to Mr Nick Mou Chen for his assistance in experimental analysis.
Corresponding Author: Tyagi, V.K.; Department of Civil Engineering, Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Journal Publications [CE]

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