Production of 1,3-propanediol using enzymatic hydrolysate derived from pretreated distillers' grains

Li Yang; Guangyang Jiang; Jia Chen; Zhe Xu; Yichen Yang; Bijun Zheng; Yi Yang; He Huang; Yongqiang Tian

doi:10.1016/j.biortech.2023.128773

Production of 1,3-propanediol using enzymatic hydrolysate derived from pretreated distillers' grains

Bioresour Technol. 2023 Apr:374:128773. doi: 10.1016/j.biortech.2023.128773. Epub 2023 Feb 23.

Authors

Li Yang¹, Guangyang Jiang¹, Jia Chen¹, Zhe Xu¹, Yichen Yang¹, Bijun Zheng¹, Yi Yang¹, He Huang², Yongqiang Tian³

Affiliations

¹ College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China; Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, Sichuan 610065, China.
² School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China.
³ College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China; Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, Sichuan 610065, China. Electronic address: yqtian@scu.edu.cn.

PMID: 36828224
DOI: 10.1016/j.biortech.2023.128773

Abstract

To minimize environmental pollution and waste of resources, distillers' grains (DG) was used to produce 1,3-propanediol. Biological, physical, and chemical methods were used for pretreatment. The correlation between features of pretreated samples and enzymatic digestibility was analyzed. The results showed that the glucan and xylan conversion of dilute sulfuric acid pretreated DG increased by 69.59% and 413.68%, respectively. The glucan conversion of microwave pretreated and xylan conversion of laccase pretreated DG increased by 14.22% and 34.19%, respectively. Pretreatment enhanced enzymatic digestibility through changing the dense structure and features of DG making them conductive to enzymatic hydrolysis. The production of 1,3-propanediol using enzymatic hydrolysate of pretreated DG and glycerol in shake-flask was 17 g/L. The utilization of DG not only provides plentiful raw materials replacing fossil fuels to produce biofuels and other chemicals but efficiently reduces environmental waste.

Keywords: 1,3-Propanediol; Distillers’ grains; Enzymatic hydrolysate; Features; Pretreatment.

MeSH terms

Fermentation
Glucans*
Hydrolysis
Industrial Waste
Propylene Glycol
Xylans*

Substances

1,3-propanediol
Xylans
Glucans
Propylene Glycol
Industrial Waste