Premium
Conversion of straw–manure mixtures to methane at mesophilic and thermophilic temperatures
Author(s) -
Hashimoto Andrew G.
Publication year - 1983
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260250115
Subject(s) - straw , mesophile , manure , chemistry , fermentation , methane , ammonia , agronomy , anaerobic digestion , thermophile , methanogenesis , pulp and paper industry , food science , biology , bacteria , biochemistry , organic chemistry , enzyme , engineering , inorganic chemistry , genetics
The effects of temperature (35 and 55°C) and straw–manure mixtures (90, 75, 50, and 0% straw) on methane (CH 4 ) production were studied using laboratory‐scale fermentors. Batch fermentations showed that the ultimate CH 4 yield ( B 0 ) of straw–manure mixtures was directly proportional to the relative proportion and B 0 of the individual components. Also, hammer or ball milling did not increase the B 0 of straw. Kinetic analysis showed that fermentation stress occurred when the straw content of straw–manure mixtures was higher than 40% at 35°C, or higher than 75% at 55°C. This fermentation stress was observed to occur when the free ammonia concentration was below 10 g/m 3 .