BioChem - DOS

Investigation of gas stripping and pervaporation for improved feasibility of two-stage butanol production process

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Setlhaku, M.; Heitmann, S.; Gorak, A.; Wichmann, R.

Gas stripping and pervaporation are investigated for butanol recovery in a two-stage acetone-butanol-ethanol (ABE) fermentation process. The first stage is operated in a continuous mode and the second stage as a fed-batch. Gas stripping coupled to the second stage and operated intermittently enabled additional glucose feeding in the second stage and up to 59g/L butanol and 73g/L total ABE solvents in the condensate. Concentration of 167g/L butanol and 269g/L ABE in the permeate was measured in ex situ pervaporation experiments using a PDMS membrane at temperature of 37<SUP>o</SUP>C and pressure of 10mbars. The ''operating window'' tool is introduced to evaluate the feasibility of the existing ABE fermentations operated as continuous with cell recycle, as two-stages, with biomass immobilization or with integrated product removal. This tool enables the identification of the most favorable process configuration, which is the combination of cell immobilization and integrated product removal.

2013

Elsevier Applied Science

0960-8524

136

pp.102-108

10.1016/j.biortech.2013.02.046

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65929659

Butanol; Clostridium acetobutylicum; Two-stage fermentation; Gas-stripping; Pervaporation; Window of operation