Comparative biochemical methane potential of paragrass using an unacclimated and an acclimated microbial consortium.
The effect of inoculum sources on the anaerobic digestion of paragrass was investigated. Two types of sludge were used as the inoculums: an anaerobic sludge obtained from a domestic wastewater treatment plant (OS) and a sludge acclimated to fibrous substrates in raw palm oil mill effluent (AMC). Microbial activity assays showed that the AMC had hydrolytic and acetogenic activities two times greater than the activities of the OS. In addition, the production of methane from acetate by the AMC occurred without a lag phase, while it took 8 days for the OS to start producing methane from the same substrate. The biochemical methane potential after 80 days digestion was 316 ml STP/g VS(added) using the AMC, and 277 ml STP/g VS(added) using the OS. The methane potential of the paragrass was estimated to be 3337 Nm(3) CH4/ha a.
The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand; The Research and Technology Center for Renewable Products and Energy, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand.
Sasikarn
S
Nuchdang
The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand; The Research and Technology Center for Renewable Products and Energy, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand.
Maneerat
M
Khemkhao
National Center for Genetic Engineering and Biotechnology (BIOTEC), Bangkok 10150, Thailand.
Somkiet
S
Techkarnjanaruk
The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand; The Research and Technology Center for Renewable Products and Energy, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand; Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand. Electronic address: cpk@kmutnb.ac.th.
Chantaraporn
C
Phalakornkule
D000064:Acclimatization; D000085:Acetates / Q000032:analysis; D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D002482:Cellulose / Q000378:metabolism; D018556:Crops, Agricultural / Q000737:chemistry; D006868:Hydrolysis; D008697:Methane / Q000096:biosynthesis*; D059013:Microbial Consortia; D006109:Poaceae / Q000378:metabolism*; D011134:Polysaccharides / Q000378:metabolism; D012722:Sewage / Q000382:microbiology
D000085:Acetates; D056804:Biofuels; D011134:Polysaccharides; D012722:Sewage; C007916:hemicellulose; D002482:Cellulose; D008697:Methane
Anaerobic digestion; Biogas; Inoculums; Microbial activities; Paragrass