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Simulation of the Impact of SRT on Anaerobic Digestability of Ultrasonicated Hog Manure
Department of Civil and Environmental Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
* Author to whom correspondence should be addressed.
Received: 26 March 2010; Accepted: 15 April 2010 / Published: 11 May 2010
Abstract: Ultrasonication at a specific energy of 500 kJ/kgTS was applied to hog manure in a continuous mode completely mixed anaerobic digestion. A process model in BioWin was developed, calibrated and tested at different solids retention times (SRTs) to evaluate the process economics. The results showed that there was a 36% increase in volatile suspended solids (VSS) removal efficiency, a 20% increase in methane production rate, a 13.5% increase in destruction of bound proteins, and a reduction from 988 to 566 ppm in H2S concentration in the digester headspace. Furthermore, a calibrated model of the process using BioWin to assess the impact of SRTs on the economics of anaerobic digestion for unsonicated and sonicated hog manure revealed that ultrasonication resulted in a net benefit of $42–46/ton dry solids at SRTs of 15–30 days.
Keywords: anaerobic digestion; SRT; ultrasound; hog manure; bound protein
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Elbeshbishy, E.; Nakevski, A.; Hafez, H.; Ray, M.; Nakhla, G. Simulation of the Impact of SRT on Anaerobic Digestability of Ultrasonicated Hog Manure. Energies 2010, 3, 974-988.
Elbeshbishy E, Nakevski A, Hafez H, Ray M, Nakhla G. Simulation of the Impact of SRT on Anaerobic Digestability of Ultrasonicated Hog Manure. Energies. 2010; 3(5):974-988.
Elbeshbishy, Elsayed; Nakevski, Angel; Hafez, Hisham; Ray, Madhumita; Nakhla, George. 2010. "Simulation of the Impact of SRT on Anaerobic Digestability of Ultrasonicated Hog Manure." Energies 3, no. 5: 974-988.