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Sustainable fermentative hydrogen production: challenges for process optimisation

Sustainable fermentative hydrogen production: challenges for process optimisation,10.1016/S0360-3199(02)00090-3,International Journal of Hydrogen Ener

Sustainable fermentative hydrogen production: challenges for process optimisation   (Citations: 229)
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This paper reviews information from continuous laboratory studies of fermentative hydrogen production useful when considering practical applications of the technology. Data from reactors operating with pure cultures and mixed microflora enriched from natural sources are considered. Inocula have been derived from heat-treated anaerobically digested sludge, activated sludge, aerobic compost and soil, and non-heat-treated aerobically composted activated sludge. Most studies are on soluble defined substrates, and there are few reports of continuous operation on complex substrates with mixed microflora to produce H2. Methanogenesis which consumes H2 may be prevented by operation at short hydraulic retention times (around 8–12h on simple substrates) and/or pH below 6. Although the reactor technology for anaerobic digestion and biohydrogen production from complex substrates may be similar, there are important microbiological differences, including the need to manage spore germination and oxygen toxicity on start-up and control sporulation in adverse circumstances during reactor operation.
Journal: International Journal of Hydrogen Energy - INT J HYDROGEN ENERG , vol. 27, no. 11, pp. 1339-1347, 2002
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