Effect of co-cultivation of Chlamydomonas reinhardtii with Azotobacter chroococcum on hydrogen production |
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Authors: | Lili Xu Xianglong Cheng Quanxi Wang |
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Affiliation: | Department of Biology, College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, PR China |
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Abstract: | Chlamydomonas reinhardtii cc124 and Azotobacter chroococcum bacteria were co-cultured with a series of volume ratios and under a variety of light densities to determine the optimal culture conditions and to investigate the mechanism by which co-cultivation improves H2 yield. The results demonstrated that the optimal culture conditions for the highest H2 production of the combined system were a 1:40 vol ratio of bacterial cultures to algal cultures under 200 μE m?2 s?1. Under these conditions, the maximal H2 yield was 255 μmol mg?1 Chl, which was approximately 15.9-fold of the control. The reasons for the improvement in H2 yield included decreased O2 content, enhanced algal growth, and increased H2ase activity and starch content of the combined system. |
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Keywords: | Co-culture Bio-hydrogen production sulfur S Chl chlorophyll photosystem PS hydrogenase hour h dissolved oxygen DO minute min |
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