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

Energies

Elsayed Elbeshbishy¹  Angel Nakevski²  Hisham Hafez¹  Madhumita Ray² 

[1]Department of Civil and Environmental Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada

[2] E-Mails:

[3]Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada

[4] E-Mail:

关键词: anaerobic digestion;    SRT;    ultrasound;    hog manure;    bound protein;   

DOI  :  10.3390/en3050974

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.