期刊
BIORESOURCE TECHNOLOGY
卷 104, 期 -, 页码 503-508出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.11.028
关键词
Bacterial cellulose; Ionic liquid; Cotton-based waste textiles; Enzymatic saccharification; Biorefinery
资金
- Science and Technology Commission of Shanghai Municipality [11230700600, 08520750200]
- Shanghai Municipal Education Commission [09ZZ68]
- 111 Project [B07024]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials (Donghua University)
- Swedish Research Council [348-2006-6705]
- Fundamental Research Funds for the Central Universities
Cotton-based waste textiles were explored as alternative feedstock for production of bacterial cellulose (BC) by Gluconacetobacter xylinus. The cellulosic fabrics were treated with the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([AMIM]Cl). [AMIM]Cl caused 25% inactivation of cellulase activity at a concentration as low as of 0.02 g/mL and decreased BC production during fermentation when present in concentrations higher than 0.0005 g/mL. Therefore, removal of residual IL by washing with hot water was highly beneficial to enzymatic saccharification as well as BC production. IL-treated fabrics exhibited a 5-7-fold higher enzymatic hydrolysis rate and gave a seven times larger yield of fermentable sugars than untreated fabrics. BC from cotton cloth hydrolysate was obtained at an yield of 10.8 g/L which was 83% higher than that from the culture grown on glucose-based medium. The BC from G. xylinus grown on IL-treated fabric hydrolysate had a 79% higher tensile strength than BC from glucose-based culture medium which suggests that waste cotton pretreated with [AMIM]Cl has potential to serve as a high-quality carbon source for BC production. (C) 2011 Elsevier Ltd. All rights reserved.
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