TAILIEUCHUNG - Progress in Biomass and Bioenergy Production Part 14

Tham khảo tài liệu 'progress in biomass and bioenergy production part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Ethanol and Hydrogen Production with Thermophilic Bacteria from Sugars and Complex Biomass 379 pH on the H2 production. Hydrogen yields from different pH levels were all similar the highest obtained at pH mmol H2 g COD-1 except for pH the lowest pH level where there was no H2 production at all Lee et al. 2008 . The main bacteria present belong to the genus Clostridium. In the other investigation much higher yields were obtained or mmol H2 g COD-1 and the predominant species was closely affiliated to Thermoanaerobacterium thermosaccharolyticum Lee et al. 2010 . Recent study of H2 production from kitchen waste with mixed cultures from various sources showed good production rates ml L-1 h-1 but much lower yields mol H2 mol glucose-1 equivalent Wang et al. 2009 . A continuous culture study on H2 production from food waste by the use of mixed culture originating from anaerobic waste water treatment plant resulted in maximum of mol H2 mol hexose-1 Chu et al. 2008 . Other studies with food waste include . continuous culture CSTR studies by Shin et al. 2004 and Shin Youn 2005 at sugar concentration of 25 g L-1. Clearly the effects of substrate concentrations are important but higest yields mol H2 mol hexose-1 were obtained at 8 g VS L Shin et al. 2004 . Maximum H2 production rate and yield occurred at 8 g VSL-1 d-1 5 days HRT and pH Shin Youn 2005 . Hydrogen production from household solid waste by using extreme-thermophilic 70 C mixed culture resulted in 2 mol H2 mol hexose-1 Liu et al. 2008a and mol H2 mol hexose-1 Liu et al. 2008b . Other studies on various mixed substrates include pig slurry Kotsopoulous et al. 2009 rice winery wastewater Yu et al. 2002 palm oil effluent POME Ismail et al. 2010 O Thong et al. 2008 Prasertsan et al. 2009 and cheese whey Azbar et al. 2009a 2009b and are presented in Table 6. Fewer studies have been done using pure microbial cultures producing H2 from complex biomass. Caldicellulosiruptor .

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