Thermophilic hydrogen fermentation from Korean rice straw by Thermotoga neapolitana |
| |
Authors: | Tam-Anh D. Nguyen Kyoung-Rok Kim Mi Sun Kim Sang Jun Sim |
| |
Affiliation: | a Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, South Korea;b Bioenergy Research Center, Korea Institute of Energy Research, Daejeon 305-343, South Korea |
| |
Abstract: | Rice straw, a low-cost lignocellulosic biomass was used as feedstock for thermophilic hydrogen fermentation by Thermotoga neapolitana. Hydrogen production, the growth and cellulose digestibility of the hyperthermophile in batch mode from untreated as well as chemically pretreated (ammonia and dilute sulfuric acid) Korean rice straws were investigated. Pretreatment method using combination of 10% ammonia and 1.0% dilute sulfuric acid was developed to increase the digestibility of rice straw for the hyperthermophilic H2 fermentation and to decrease the time consumption. In a typical fermentation using raw rice straw, 29% of the substrate was digested and 2.3 mmol H2/g straw of hydrogen yield was consistently obtained. Compared with the pretreatments using only ammonia or dilute sulfuric acid, the combined pretreatment method using both chemical agents significantly increases the digestibility of rice straw with 85.4% of substrate consumption. H2 production on rice straw from this combined pretreatment showed the highest yield (2.7 mmol H2/g straw) and the highest sugar conversions (72.9% of glucose and 95.7% of xylose). |
| |
Keywords: | Rice straw Biohydrogen production Pretreatment Thermotoga neapolitana |
本文献已被 ScienceDirect 等数据库收录! |
|