Effect of steam explosion on biodegradation of lignin in wheat straw.
The effect of steam explosion pretreatment on biodegradation of lignin in wheat straw was studied in this paper. Through experiments and analysis, 0.8MPa operation pressure and 1:20 wheat straw to water ratio are optimum for destroying lignin and the maximum of lignin loss rate is 19.94%. After steam explosion pretreatment, the wheat straw was retted by Trametes versicolor for 40 days. Biodegradation rate of lignin was tested and the maximum of 55.40% lignin loss rate was found on day 30. During the whole process of both steam explosion pretreatment and biodegradation, 75.34% lignin was degraded, without steam explosion the biodegradation of raw material the degradation rate of lignin was 31.23% only. FT-IR spectroscopy, TGA and SEM were used for further validating the results of biodegradation.
Zhang
Lian-Hui
LH
College of Engineering, China Agricultural University, 17 Qinghua Donglu, Beijing 100083, China.
Li
Dong
D
Wang
Li-Jun
LJ
Wang
Ti-Peng
TP
Zhang
Lu
L
Chen
Xiao Dong
XD
Mao
Zhi-Huai
ZH
D001487:Basidiomycota / Q000378:metabolism; D001673:Biodegradation, Environmental; D008031:Lignin / Q000378:metabolism*; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared; D013227:Steam; D013696:Temperature; D014908:Triticum / Q000378:metabolism*
D013227:Steam; C036909:lignocellulose; D008031:Lignin