Abstract
The effect of hematite with different specific surface areas (SSA) on anaerobic methanogenic process was investigated in this study using two different carbon sources (acetate or beef extract). Comparative analyses showed that methane generation rate, microbial growth and the starting-up duration were all significantly enhanced by hematite. The reduction rate of high SSA hematite was 2.5–3.5 times greater than that of low SSA hematite. This work indicated that low SSA hematite was superior to high SSA hematite in facilitating methanogenesis which was partially attributed to the lower affinity for the iron-reduction bacteria.
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