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The Effects of Ionic Liquid 1-ethyl-3-methylimidazolium Trifluoromethanesulfonate on the Production of 1,3-propanediol From Crude Glycerol by Microbial Consortium

The Effects of Ionic Liquid 1-ethyl-3-methylimidazolium Trifluoromethanesulfonate on the Production of 1,3-propanediol From Crude Glycerol by Microbial Consortium

Lili Jiang, Jianying Dai, Yaqin Sun, Zhilong Xiu

Bioprocess Biosyst Eng. 2018 Aug;41(8):1079-1088.

PMID: 29651644

Abstract:

Ionic liquids (ILs) as "green" solvents have been widely used owing to their excellent properties, e.g., for biodiesel production. Crude glycerol as a by-product in biodiesel production is an ideal feedstock for the microbial production of 1,3-propanediol (PDO), which is a versatile bulk chemical. PDO can be produced by microbial consortium with the advantages of high substrate tolerance and narrow by-product profile. In the present study, the effect of IL 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([Emim][TfO]) was evaluated on the capacity of PDO production from crude glycerol by microbial consortium DL38-BH. In the batch fermentation at 60 g/L crude glycerol and 10 g/L [Emim][TfO], the concentration and yield of PDO from glycerol increased from 23.14 g/L and 0.45 mol/mol to 31.17 g/L and 0.60 mol/mol, respectively. Our results showed that [Emim][TfO] decreased the ratio of intracellular NADH to NAD+ and increased the concentration of 3-HPA during batch fermentation. The activities of three key enzymes in glycerol metabolism were stimulated by [Emim][TfO] during the batch fermentation by microbial consortium DL38-BH. Compared to the control, the proportion of Klebsiella genus which could convert glycerol to PDO increased significantly from 79.19% to 89.49% and the other genera that did not produce PDO were dramatically decreased (P < 0.05) at the end of batch fermentation. This work demonstrated that [Emim][TfO] significantly improved the concentration and yield of PDO from crude glycerol by adjusting microbial community during batch fermentation by microbial consortium.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP145022442	1-Ethyl-3-methylimidazolium trifluoromethanesulfonate		145022-44-2	Price

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