Wipa PrapinagsornSureewan SittijundaAlissara ReungsangKhon Kaen UniversityRajabhat UniversityFaculty of Environment and Resource Studies, Mahidol University2018-12-212019-03-142018-12-212019-03-142017-01-01Energies. Vol.10, No.10 (2017)199610732-s2.0-85040175067https://repository.li.mahidol.ac.th/handle/20.500.14594/42520© 2017 by the authors. 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 CH4/g-VSaddedwere 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 CH4/g-VSaddedwas 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 CH4/g-VSadded, 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.Mahidol UniversityEnergyEngineeringArticleSCOPUS10.3390/en10101654