Promoting enzymatic saccharification of organosolv-pretreated poplar sawdust by saponin-rich tea seed waste.

Bioprocess and Biosystems Engineering
Chenhuan LaiQiang Yong

Abstract

Organosolv pretreatment with two ethanol concentrations (25% and 50%, v/v) was performed to improve enzymatic saccharification of poplar sawdust. It was found that lower ethanol concentration (25%, v/v) pretreatment resulted in a higher enzymatic digestibility of poplar (38.1%) due to its higher xylan removal and similar lignin removal ratios, compared to that pretreated with 50% (v/v) ethanol pretreatment (27.5%). However, the residual lignin still exhibited a strong inhibition on enzymatic hydrolysis of organosolv-pretreated poplar (OP). Bio-surfactant preparations including tea saponin (TS), TS crude extract, and tea seed waste were applied in enzymatic hydrolysis of OP, due to their potential ability of reducing enzyme non-productive binding on lignin. Their optimal loadings in enzymatic hydrolysis of OP were optimized, which indicated that adding 0.075 g/g glucan of TS improved the 72-h glucose yield of OP by 48.3%. Moreover, adding TS crude extract and tea seed waste exhibited the better performance than TS for improving enzymatic hydrolysis of OP. It was verified that the presence of protein in TS crude extract and tea seed waste accounted for the higher improvement. More importantly, the directly application of tea seed...Continue Reading

References

Jan 28, 2006·Science·Arthur J RagauskasTimothy Tschaplinski
Dec 19, 2008·Biotechnology and Bioengineering·Sang Hyun LeeJonathan S Dordick
Dec 6, 2016·Frontiers in Chemistry·Mi LiArthur J Ragauskas
Apr 28, 2018·Bioprocess and Biosystems Engineering·A AlhammadL P Christopher
Jul 18, 2018·Bioresource Technology·Xianqin LuJian Zhao
Mar 27, 2019·Biotechnology for Biofuels·Xiaolin LuoLi Shuai

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Citations

Aug 9, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alfredo Oliva-TaravillaCarlos Martín

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