Article ID Journal Published Year Pages File Type
681034 Bioresource Technology 2013 7 Pages PDF
Abstract

The present study investigated to find out the suitability of the CO2 sequestered algal biomass of Chlorella sorokiniana as substrate for the hydrogen production by Enterobacter cloacae IIT-BT 08. The maximum biomass productivity in continuous mode of operation in autotrophic condition was enhanced from 0.05 g L−1 h−1 in air to 0.11 g L−1 h−1 in 5% air–CO2 (v/v) gas mixture at an optimum dilution rate of 0.05 h−1. Decrease in steady state biomass and productivity was less sensitive at higher dilution and found fitting with the model proposed by Eppley and Dyer (1965). Pretreated algal biomass of 10 g L−1 with 2% (v/v) HCl–heat was found most suitable for hydrogen production yielding 9 ± 2 mol H2 (kg COD reduced)−1 and was found fitting with modified Gompertz equation. Further, hydrogen energy recovery in dark fermentation was significantly enhanced compared to earlier report of hydrogen production by biophotolysis of algae.

► Operating continuous mode of operation for CO2 sequestration using C. sorokiniana. ► Modeling and simulation of continuous culture of algae. ► Utilizing algal biomass as substrate for H2 production using E. cloacae IIT-BT 08. ► Better H2 energy using algal biomass as substrate over its use in biophotolysis.

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Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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