乳白耙菌预处理对烟秆发酵产乳酸的影响

宋丽丽; 霍姗浩; 冯梦琪; 杨旭; 张志平; 张靖楠; 魏涛

doi:10.12187/2023.06.011

December 2023

Article Contents

SONG Lili, HUO Shanhao, FENG Mengqi, et al. Effect of pretreatment with Irpex lacteus on lactic acid production from tobacco stalks[J]. Journal of Light Industry, 2023, 38(6): 85-92. doi: 10.12187/2023.06.011

Citation: SONG Lili, HUO Shanhao, FENG Mengqi, et al. Effect of pretreatment with Irpex lacteus on lactic acid production from tobacco stalks[J]. Journal of Light Industry, 2023, 38(6): 85-92. doi: 10.12187/2023.06.011 shu

Effect of pretreatment with Irpex lacteus on lactic acid production from tobacco stalks

College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Received Date: 2023-04-03
Accepted Date: 2023-05-27

Abstract

To solve the problems of dense structure of tobacco stalk, strong nicotine inhibition and low conversion efficiency of cellulosic sugars, the tobacco stalks were pretreated with Irpex lacteus. The composition and structure changes of tobacco stalks before and after pretreatment were compared to study the effects of I. lacteus pretreatment on enzymatic hydrolysis and saccharification of tobacco stalks. The conversion rate of lactic acid from tobacco stalks fermented by Bacillus coagulans under different fermentation conditions (simultaneous saccharification fermentation, batch fermentation) was further compared. The results showed that the mass fraction of lignin in the tobacco stalks was reduced by 44.90% compared with that of the raw tobacco stalks. Biological pretreatment using I. lacteus could selectively destroy the macromolecular structure of lignin, and the benzene ring structure and side chain groups of lignin were also degraded. The reactivity of cellulose in tobacco stalks was improved after pretreatment with I. lacteus and the yield of glucose was 260 mg/g, which was enhanced by 2.25 times compared with raw tobacco stalks. Compared with batch fermentation, the lactic acid yield of simultaneous saccharification fermentation was higher (392.16 mg/g), and the conversion rate of lactic acid reached 86.95%, which was 3.78 times higher than that of raw tobacco stalks. The pretreatment of I. lacteus could selectively degrade lignin of tobacco stalks, reduce the resistance of enzymatic hydrolysis to saccharification of tobacco stalks and increase the conversion rate of lactic acid of tobacco stalks.
- tobacco stalk,
- Irpex lacteus,
- lignin,
- glucose,
- lactic acid
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Effect of pretreatment with Irpex lacteus on lactic acid production from tobacco stalks

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