Response of a biohydrogen-producing reactor to the substrate shift from sucrose to lactose
The response of an upflow acidogenic granule-based reactor to the substrate shift (lactose instead of sucrose) was investigated in this study. Experimental results show that the reactor took 60 hours to adapt and degrade the new substrate completely. Both H2 partial pressure and H2 yield were affected, in the range of 0.38 to 0.07 atm and 1.33 to 0.64 mol-H2/mol-sugar, respectively. The pH of the effluents also increased from 3.90 to 4.50 during the process. Acetate, propionate, butyrate, valerate, caporate, ethanol and propanol were present in the effluent of the UASB reactor, and their distribution changed significantly after the substrate shift. As the substrate was changed, the caproate-type and ethanol-type fermentation were weakened, while the propionate-type fermentation was strengthened. Although affected by the substrate shift, the butyrate type fermentation played an important role through this experiment. The H2 yield had a good relativity with propionate and B/A (butyrate/acetate) during this substrate shift process.
Acidogenesis H2 production sucrose lactose upflow anaerobic sludge blanket (UASB)
Quan-Bao Zhao Xian-Wei Liu Fang Dong Han-Qing Yu
Laboratory of Environmental Engineering, Department of Chemistry, University of Science & Technology of China, Hefei, 230026 China
国际会议
第七届中日水环境研讨会暨NSFC-JST重大国际合作项目成果交流会
北京
英文
61-67
2007-10-25（万方平台首次上网日期，不代表论文的发表时间）