Abstract
Equipment and procedures were developed to study the conversion of lignocellulosic biomass to carboxylic acids using high-solids countercurrent fermentations. Countercurrent fermentations of cattle manure yielded a rapid fermentation (maximum 2.98 g of total acid/[L·d]) with high acid concentrations (maximum of 32.5 g of total acid/L), but the acid yield tended to be low (maximum of 0.24 g of total acid/g of volatile solids). Countercurrent fermentations of a mixture of 80% municipal solid waste/20% sewage sludge fermented more slowly (maximum of 1.98 g of total acid /[L·d]) with a lower acid concentration (maximum of 26.5 g of total acids/L), but higher acid yields were achieved (maximum of 0.34 g of total acid/g of volatile solids).
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Ross, M.K., Holtzapple, M.T. Laboratory method for high-solids countercurrent fermentations. Appl Biochem Biotechnol 94, 111–126 (2001). https://doi.org/10.1385/ABAB:94:2:111
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DOI: https://doi.org/10.1385/ABAB:94:2:111