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

Article, Other literature type OPEN
Elsayed Elbeshbishy ; Angel Nakevski ; Hisham Hafez ; Madhumita Ray ; George Nakhla (2010)
  • Publisher: Molecular Diversity Preservation International
  • Journal: Energies, volume 3, issue 5 5, pages 1-15 (issn: 1996-1073)
  • Related identifiers: doi: 10.3390/en3050974
  • Subject: anaerobic digestion; SRT; ultrasound; hog manure; bound protein | hog manure | Technology | ultrasound | SRT | T | bound protein | anaerobic digestion
    • jel: jel:Q0 | jel:Q | jel:Q4 | jel:Q47 | jel:Q49 | jel:Q48 | jel:Q43 | jel:Q42 | jel:Q41 | jel:Q40

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 H 2 S 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.
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