Bacterial strain for bast fiber crops degumming and its bio-degumming technique

文献类型： 外文期刊

第一作者： Duan, Shengwen

作者： Duan, Shengwen;Cheng, Lifeng;Feng, Xiangyuan;Yang, Qi;Zheng, Ke;Gao, Mingqiang;Liu, Zhiyuan;Liu, Chunjie;Peng, Yuande;Xu, Bingrong

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关键词： Pectobacterium wasabiae; Bast fiber crop; Bio-degumming; Enzyme catalysis

期刊名称：BIOPROCESS AND BIOSYSTEMS ENGINEERING （ 影响因子：3.21； 五年影响因子：2.97 ）

ISSN： 1615-7591

年卷期： 2021 年 44 卷 12 期

页码：

收录情况： SCI

摘要： The research and development of bio-degumming technology is under a slow progress due to the shortage of proper efficient bacterial strains and processes. A degumming bacterial strain-Pectobacterium wasabiae (PW)-with broad-spectrum degumming abilities was screened out in this study. After the fermentation for 12 h, the residual gum contents of kenaf bast, ramie bast, hemp bast, flax bast, and Apocynum venetum bast were all lower than 15%. This bacterial strain could realize the simultaneous extracellular secretion of pectinase, mannase, and xylanase with the maximum enzyme activity levels of 130.25, 157.58, and 115.24 U/mL, respectively. The optimal degumming conditions of this bacterial strain were as follows: degumming time of 12 h, bath ratio of 1:10, temperature of 33 degrees C, and inoculum size of 2%. After the bio-degumming through this bacterial strain, the COD in wastewater was below 4000 mg/L, which was over 60% lower than that in boiling-off wastewater generated by chemical degumming. This technology achieves higher efficiency, higher quality, and lower pollution.

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