期刊
WATER SCIENCE AND TECHNOLOGY
卷 49, 期 5-6, 页码 223-228出版社
IWA PUBLISHING
DOI: 10.2166/wst.2004.0757
关键词
fermentation; food wastewater; hydrogen production; molasses
Batch experiments were conducted to convert molasses wastewater (10-160 g COD/L) into hydrogen at 35degreesC at various pH (4-8). The maximum hydrogen productivity (HP) and hydrogen production rate (HPR) reached 47.1 mmol-H2/g CODre and 97.5 mmol-H2/L-day, respectively, at a substrate concentration of 40 g COD/L and pH 6.0. The methane-free biogas contained up to 50% (v/v) of hydrogen. Fermentation at wastewater concentrations higher than 60 g COD/L required a long acclimation period (more than 20 h). Though the fractions were substrate concentration and pH-dependent, acetate and butyrate were the two main liquid fermentation products. A comparison of the HP and HPR data indicates that defining a hydrogen yield indicator to evaluate hydrogen generation efficiency should be taken into consideration in practical fermentation operations.
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