| Title: | Enhancing the anaerobic digestion of corn stalks using composite microbial pretreatment |
| Author(s): | Yuan X; Li P; Wang H; Wang X; Cheng X; Cui Z; |
| Address: | "Center of Biomass Engineering / College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China" |
| ISSN/ISBN: | 1738-8872 (Electronic) 1017-7825 (Linking) |
| Abstract: | "A composite microbial system (XDC-2) was used to pretreat and hydrolyze corn stalk to enhance anaerobic digestion. The results of pretreatment indicated that sCOD concentrations of hydrolysate were highest (8,233 mg/l) at the fifth day. XDC-2 efficiently degraded the corn stalk by nearly 45%, decreasing the cellulose content by 22.7% and the hemicellulose content by 74.1%. Total levels of volatile products peaked on the fifth day. The six major compounds present were ethanol (0.29 g/l), acetic acid (0.55 g/l), 1,2-ethanediol (0.49 g/l), propionic acid (0.15 g/l), butyric acid (0.22 g/l), and glycerine (2.48 g/l). The results of anaerobic digestion showed that corn stalks treated by XDC-2 produced 68.3% more total biogas and 87.9% more total methane than untreated controls. The technical digestion time for the treated corn stalks was 35.7% shorter than without treatment. The composite microbial system pretreatment could be a cost-effective and environmentally friendly microbial method for efficient biological conversion of corn stalk into bioenergy" |
| Keywords: | Anaerobiosis Bacteria/*metabolism Biofuels Biotechnology/*methods Cellulose/metabolism Fermentation Hydrolysis Methane/metabolism Plant Stems/*metabolism Time Factors Volatile Organic Compounds/metabolism Zea mays/*metabolism; |
| Notes: | "MedlineYuan, Xufeng Li, Peipei Wang, Hui Wang, Xiaofen Cheng, Xu Cui, Zongjun eng Research Support, Non-U.S. Gov't Korea (South) 2011/07/28 J Microbiol Biotechnol. 2011 Jul; 21(7):746-52. doi: 10.4014/jmb.1011.11026" |
