Enhanced photo-H2 production by unsaturated flow condition in continuous culture
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A biofilm photobioreactor under unsaturated flow condition (BFPBR-U) is proposed using a polished optical fiber as the internal light source for photo-H2 production in continuous culture. The main chamber was filled with spherical glass beads to create the reaction bed and the cells were immobilized to form a biofilm under unsaturated flow condition obtained by pumping substrate solution over a packing bed at a rate to create a thin fluid film and injecting the argon to maintain the gas phase space. The effects of operational conditions, including flow rate and influent substrate concentration, on the photo-H2 production performance were investigated. The unsaturated flow conditions eliminated the inhibition caused by high organic loading rate and enhanced light transmission efficiency, leading to an improvement in the photo-H2 production performance.
KeywordsBiofilm photobioreactor H2 production Optical fiber Photo--H2 production Photosynthetic bacteria Unsaturated flow conditions
The authors gratefully acknowledge financial supported by the Fundamental Research Funds for the Central Universities (No. 2014QNB03), the National Natural Science Foundation of China (No. 51406227) and sincerely appreciate Prof. Qiang Liao and Prof. Xun Zhu from Chongqing University for their suggestion on the experiment.