Microbial and enzymatic improvement of anaerobic digestion of waste biomass |
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Authors: | Vikas Sonakya Neena Raizada Vipin C. Kalia |
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Affiliation: | (1) Centre for Biochemical Technology (CSIR), Delhi University Campus, Mall Road, Delhi, 110 007, India |
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Abstract: | Metabolic activities of different microorganisms (Bacillus subtilis, B. licheniformis and Aspergillus niger) and hydrolytic enzymes (concentrations: 1 to 200 mg enzyme solids g–1 feed) were studied individually and in combinations with respect to H2 and methane production from damaged wheat grains. Bacillus subtilis, B. licheniformis and pre-existing hydrogen producers (control) produced 45 to 64 l H2 kg–1 total solids and subsequently, with the help of added methanogens, 155 to 220 l methane kg–1 total solids could be produced. H2 production from damaged wheat grains could be decreased to 28% or enhanced up to 152% with respect to control, by employing various microbial and enzymatic treatments. Similarly, it has been made possible to vary methane production capacities from as low as 17% to as high as 110% with respect to control. |
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Keywords: | anaerobic digestion Aspergillus Bacillus biomethanation hydrogen |
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