Frontiers of Chemical Science and Engineering >
Optimization and modeling of biohydrogen production by mixed bacterial cultures from raw cassava starch
Received date: 17 Jul 2016
Accepted date: 22 Sep 2016
Published date: 17 Mar 2017
Copyright
The production of bio-hydrogen from raw cassava starch via a mixed-culture dark fermentation process was investigated. The production yield of H2 was optimized by adjusting the substrate concentration and the microorganism mixture ratio. A maximum H2 yield of 1.72 mol H2/mol glucose was obtained with a cassava starch concentration of 10 g/L to give a 90% utilization rate. The kinetics of the substrate utilization and of the generation of both hydrogen and volatile fatty acids were also investigated. The substrate utilization follows pseudo first order reaction kinetics, whereas the production of both H2 and the VFAs correlate with the Gompertz equation. These results show that cassava is a good candidate for the production of biohydrogen.
Key words: cassava; biohydrogen; mixed cultures; kinetics
Shaojie Wang , Zhihong Ma , Ting Zhang , Meidan Bao , Haijia Su . Optimization and modeling of biohydrogen production by mixed bacterial cultures from raw cassava starch[J]. Frontiers of Chemical Science and Engineering, 2017 , 11(1) : 100 -106 . DOI: 10.1007/s11705-017-1617-3
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