Abstract:
:Sorghum was pretreated by sole ultrasound or supercritical carbon dioxide (scCO2), as well as the method combining both to intensify enzymatic hydrolysis. The effect of the time (1-5 h) and temperature (30-70 °C) on ultrasonic pretreatment was investigated, and the best condition was determined as 5 h and 50 °C with the EH sugar yield of 33.69%. The influence of the time (6-48 h), temperature (40-80 °C), and pressure (15-25 MPa) on scCO2 pretreatment were also discussed in this study. The optimum condition of scCO2 pretreatment was identified as 60 °C, 20 MPa, and 36 h with the EH sugar yield of 43.57%. Compared with the sole ultrasonic or scCO2 pretreatment, scCO2 associated with the subsequent ultrasonic pretreatment did not show significant improvement in sugar yield. However, 30 MPa was an extremely effective pressure, which led to 45.50% EH sugar yield with 60 °C, 6-h pretreatment. Finally, the change of the microscopic structures of the sorghum stalk after the pretreatment was investigated using scanning electron microscope (SEM) and X-ray diffraction (XRD).
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Zhang Q,Zhao M,Xu Q,Ren H,Yin Jdoi
10.1007/s12010-018-2909-xsubject
Has Abstractpub_date
2019-05-01 00:00:00pages
101-111issue
1eissn
0273-2289issn
1559-0291pii
10.1007/s12010-018-2909-xjournal_volume
188pub_type
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