Journal
BIORESOURCE TECHNOLOGY
Volume 101, Issue 3, Pages 990-994Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.09.020
Keywords
Rice straw; Acid pretreatment; Delignification; Methane production; Methane
Funding
- Strategic Japanese-Chinese Cooperative
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Rice straw was treated with a mixed solution of acetic acid and propionic acid to enhance its biodegradability. The effect of acid concentration, pretreatment time, and the ratio of solid to liquid on the delignification performance of rice straw were investigated. It was found that the optimal conditions for hydrolysis were 0.75 mol/L acid concentration, 2 h pretreatment time and 1:20 solid to liquid ratio. Batch methane fermentation of untreated rice straw, pretreated rice straw, and the hydrolysates (the liquid fraction) of pretreatment were conducted at 35 degrees C for 30 days, and the results indicated that methane production of rice straw can be enhanced by dilute organic acid pretreatment. Moreover, most of the acid in hydrolysates can also be converted into methane gas. (C) 2009 Elsevier Ltd. All rights reserved.
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