Response of a biohydrogen-producing reactor to the substrate shift from sucrose to lactose |
| |
Authors: | Zhao Quan-Bao Mu Yang Wang Yi Liu Xian-Wei Dong Fang Yu Han-Qing |
| |
Affiliation: | Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China. |
| |
Abstract: | The response of an upflow acidogenic granule-based reactor to the substrate shift from sucrose to lactose was investigated in this study. Experimental results show that it took 60h for the reactor to completely degrade the new substrate. Hydrogen production performance, in terms of H(2) partial pressure, H(2) production rate and H(2) yield, was affected. Acetate, propionate, butyrate, valerate, caporate, ethanol and propanol were present in the reactor effluent, and their distribution changed significantly after the substrate shift. As the substrate was changed, the caproate- and ethanol-type fermentation was weakened, while the propionate-type fermentation was strengthened. Throughout the experiment, the butyrate-type fermentation played an important role. The H(2) yield had a close correlation with both propionate and B/A (butyrate/acetate) in this substrate shift process. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|