Biohydrogen production from cassava starch processing wastewater by thermophilic mixed cultures

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• 作者：Sompong O-Thong^a ; ^{sompong.o@gmail.com} ; Adilan Hniman^b ; Poonsuk Prasertsan^b ; ^c ; Tsuyoshi Imai^d
• 关键词：Thermophilic fermentation ; Hot spring ; Cassava starch processing wastewater ; Biohydrogen ; Microbial community analysis
• 刊名：International Journal of Hydrogen Energy
• 出版年：2011
• 出版时间：March 2011
• 年：2011
• 卷：36
• 期：5
• 页码：3409-3416
• 全文大小：472 K

文摘

Natural microbial consortia from hot spring samples were used to developed thermophilic mixed cultures for biohydrogen production from cassava starch processing wastewater (CSPW). Significant hydrogen production potentials were obtained from three thermophilic mixed cultures namely PK, SW and PR with maximum hydrogen production yields of 249.3, 180 and 124.9 mL H₂/g starch, respectively from raw cassava starch and 252.4, 224.4 and 165.4 mL H₂/g starch, respectively from gelatinized cassava starch. Acetic acid-ethanol and acetic-lactic acid type fermentation were observed in cassava starch fermentation, based on three thermophilic mixed cultures performance. The thermophilic mixed cultures PK, SW and PR exhibited the maximum hydrogen yield of 287, 264 and 232 mL H₂/g starch in CSPW, respectively corresponding to 53 % , 48.7 % and 42.8 % of the theoretical values. Phylogenetic analysis of thermophilic mixed cultures revealed that members involved cassava starch degrading bacteria and hydrogen producers in both raw cassava starch and CSPW were phylogenetically related to the Thermoanaerobacterium saccharolyticum, Thermoanaerobacterium thermosaccharolyticum, Anoxybacillus sp., Geobacillus sp. and Clostridium sp.