Co-Digestion of Napier Grass and Its Silage with Cow Dung for Methane Production

Wipa Prapinagsorn, Sureewan Sittijunda and Alissara Reungsang
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Wipa Prapinagsorn: Department of Biotechnology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand
Sureewan Sittijunda: Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand
Alissara Reungsang: Department of Biotechnology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand

Energies, 2017, vol. 10, issue 10, 1-20

Abstract: Methane production from co-digestion of grass with cow dung and silage with cow dung was conducted by a bioaugmentation technique. For self-fermentation, maximum methane yield (MY) of 176.66 and 184.94 mL CH 4 /g-VS added were achieved at a ratio of grass to cow dung and silage to cow dung of 1:1, respectively. A higher maximum MY of 179.59 and 208.11 mL CH 4 /g-VS added was obtained from co-digestion of grass with cow dung and silage with cow dung bioaugmented with anaerobic sludge at a ratio of 3:1. The solid residue left over after co-digestion at a ratio of 3:1 was pretreated by alkaline plus enzyme before used to produce methane and a maximum MY of 333.63 and 301.38 mL CH 4 /g-VS added , respectively, was achieved. Overall power generated from co-digestion of grass with cow dung plus pretreated solid residues and co-digestion of silage with cow dung plus pretreated solid residues were 0.0397 and 0.007 watt, respectively.

Keywords: energy crop; renewable energy; animal manure; bioaugmentation; biogas (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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