Welcome to Chemistry and Industry of Forest Products,

Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (5): 126-132.doi: 10.3969/j.issn.0253-2417.2017.05.017

Previous Articles     Next Articles

The Effect of Integrated Processes of Steam Explosion and Alkaline Pretreatment on the Structure of Wheat Straw and Its Enzymatic Hydrolysis

HE Shicheng, SUN Manyu, SUN Zhongyan, SHU Yueli, JIA Shiru, ZHONG Cheng   

  1. Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
  • Received:2017-01-07 Online:2017-10-25 Published:2017-10-30

Abstract: Various combined processes of steam explosion and alkaline pretreatment were experimentally compared and evaluated on wheat straw materials. The morphological characterizations of pretreated wheat straw were performed by scanning electron microscope and FT-IR spectroscopy, to qualitatively determine the composition changes of pretreated wheat straw. Comparing to the single process or the combination of alkaline pretreatment followed by steam explosion(ASP), the steam explosion followed by alkaline process(SAP) pretreatment removed most of lignin, degraded hemicelluloses, and incurred a higher surface area of the cellulose-rich substrates. And the remaining contents of cellulose, xylan and lignin in SAP sample were 88.15%, 5.55%, 4.13%, respectively. Moreover, SAP enhanced the fed batch enzymatic hydrolysis of cellulose-rich substrates to a maximum value of 80.53% even at the high cellulose loading of 18%. The results indicated that the SAP process is advantageous scheme for the enhancement of enzymatic efficiency.

Key words: alkaline pretreatment, steam explosion pretreatment, wheat straw, enzymatic hydrolysis

CLC Number: