BioChem - DOS

Utilizing Crude Waste Glycerol in the Biorefinery: Glycerol Gels for in Situ Substrate Delivery to Whole Cell Biocatalysts

ACS sustainable chemistry et engineering

Bothwell, Kyra M.; Krasň an, Vladimí r; Lorenzini, Fabio; Rebroš , Martin; Marr, Andrew C.; Marr, Patricia C.

<P>Sol-gel methods were used to facilitate the <I>in situ</I> controlled delivery of glycerol as a substrate for whole cell biocatalysis. The entrapment of the polyol within a silica gel matrix enabled the utilization of crude and moderately toxic bioderived substrates that could not be used in fed-batch mode. Different grades of glycerol were incorporated in gels and fed to <I>C. butyricum</I> for 1,3-propanediol production and to <I>E. coli</I> for recombinant protein production. Of particular note was the successful use of crude glycerol gels with <I>E. coli.</I> By virtue of gel immobilization, previously toxic crude glycerol samples were rendered active, and the use of gel technologies was therefore shown to expand the range of biomass that can be utilized in whole cell biocatalytic processes. Specific matching of the acid used in the gel synthesis with the fermentation medium further supported cell growth.</P><P>Glycerol gels provide a method of delivering waste glycerol from biodiesel production to biocatalysts without the need for glycerol prepurification.</P><BR>[FIG OMISSION]</BR>

2019

American Chemical Society

2168-0485

7

11

pp.9948-9956

10.1021/acssuschemeng.9b00891.s001

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART97802871

https://doi.org/10.1021/acssuschemeng.9b00891.s001

Crude glycerol; In situ substrate delivery; Whole cell biocatalysts; Sol&#x2212; gel immobilization; 1,3-Propanediol;