Add time:09/06/2019 Source:sciencedirect.com
In the present study, diluted acetic acid was used for the pretreatment of rice straw in order to improve its bioconversion into biomethane. After pretreatment with 2% acetic acid for 24 h, cellulose and hemicellulose significantly reduced by 8.9% and 18.1%, respectively. The degradation of cellulose and hemicellulose resulted in significant increase of relative lignin ratio by 14.9%. Cumulative biomethane production after 28 days of anaerobic digestion of straw pretreated with 2%, 4% and 6% for 24 h was 24.3%, 15.2%, and 18.1%, respectively, higher than the untreated sample. Longer pretreatment for 36 and 48 h showed the same trend with relatively low biomethane yield. Thus, 24 h pretreatment with 2% acetic acid improved biomethanation over other pretreatments. Scanning electron microscopy and Fourier transform infrared spectroscopy confirmed the partial degradation of rice straw and modification of lignin structure by un-bonding the ether chain within lignin molecules as a result of pretreatment. Pretreatment with 2% acetic acid for 24 h resulted in the maximum biomethane energy yield of 6.29 MJ kg−1 dry straw, 47.3% energy conversion efficiency and the maximum net profit of US$ 106.4 ton−1 dry straw. In conclusion, application of 2% acetic acid for 24 h is a promising approach for high lignocellulose degradation efficiency at mild conditions due to the relatively short pretreatment time and enhanced biomethanation.
We also recommend Trading Suppliers and Manufacturers of Acetic acid [(E)-5-dodecene]-1-yl ester (cas 16676-97-4). Pls Click Website Link as below: cas 16676-97-4 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View