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. 2011 Sep;102(18):8682-7.
doi: 10.1016/j.biortech.2011.02.067. Epub 2011 Feb 19.

Strategy of controlling the volumetric loading rate to promote hydrogen-production performance in a mesophilic-kitchen-waste fermentor and the microbial ecology analyses

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Strategy of controlling the volumetric loading rate to promote hydrogen-production performance in a mesophilic-kitchen-waste fermentor and the microbial ecology analyses

Shiue-Lin Li et al. Bioresour Technol. 2011 Sep.

Abstract

The kitchen waste was chosen as a high solid (42 gL(-1) of volatile suspended solid, VSS) and high organic (107 gL(-1) of chemical oxygen demand) feedstock for operating a 3-L mesophilic fermentor. The greatest specific hydrogen production rate ( r(H2) was observed in Stage 3 as 3.4 L-H2 L(-1) day(-1) with a volumetric loading rate (VLR) of 100 g-CODL(-1) day(-1); the highest hydrogen yield was observed in Stage 2 as 96 mL-H2 g(-1) of influent VSS with a VLR of 46 g-COD L(-1) day(-1). In Stages 1 (with a VLR of 27 g-COD L(-1)) and 2, the sum of Butyrivibrio fibrisolvens and Clostridium proteoclasticum is dominant, but in Stage 3, Olsenella genomosp, became dominant and constituted 44% of the entire population. The dependence of VLR and r(H2)could be regressed as a linear equation of r(H2) = (2.83 VLR + 40.5) x 10(-2) .

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