Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 13, Pages 6902-6908Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.04.026
Keywords
Photo-hydrogen production; Biofilm; Substrate concentration; Flow rate; Rhodopseudomonas palustris
Funding
- Natural Science Foundation of China [50825602, 20876183]
- Fundamental Research Funds for the Central Universities [CDJXS11142230]
- Natural Science Foundation Project of CQ CSTC [2009BA6022]
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Photosynthetic bacteria (PSB), Rhodopseudomonas palustris CQK 01, were immobilized on the surface of a thin glass slide in a lab-scale flat panel photobioreactor under different flow rates and substrate concentrations. The morphology, dry weight and thickness of the mature PSB biofilms were determined to reveal the relationship between biofilm formation and hydrogen production performance. The mature biofilm formed at a low flow rate and a high substrate concentration showed a looser structure, these structures of the mature biofilm then affected the H-2 production performance of the bioreactor during mature stage. The biofilm formed at a flow rate of 228 ml/h and a substrate concentration of 60 mmol/l exhibited the highest dry weight and optimally porous structure, which is beneficial not only for hydrogen removal from the biofilm but also glucose diffusion into the biofilm, thus significantly boosting the photo-hydrogen production performance. (C) 2011 Elsevier Ltd. All rights reserved.
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