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Energies 2010, 3(5), 974-988; doi:10.3390/en3050974
Article

Simulation of the Impact of SRT on Anaerobic Digestability of Ultrasonicated Hog Manure

1
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2
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1
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2,*  and 1
1 Department of Civil and Environmental Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada 2 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
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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 anaerobic digestion; SRT; ultrasound; hog manure; bound protein
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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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.

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