Application of a slurry feeder to 1 and 3 stage continuous simultaneous saccharification and fermentation of dilute acid pretreated corn stover

Brethauer Studer, Simone; Studer, Michael Hans-Peter; Wyman, Charles E. (2014). Application of a slurry feeder to 1 and 3 stage continuous simultaneous saccharification and fermentation of dilute acid pretreated corn stover Bioresource Technology, 170, pp. 470-476. Elsevier 10.1016/j.biortech.2014.07.049

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Continuous operation is often chosen for conceptual designs of biological processing of cellulosic biomass to ethanol to achieve higher volumetric productivities. Furthermore, continuous stirred tank reactors (CSTR) can handle higher solids concentrations than possible in batch mode due to broth thinning at partial conversion in a continuous fermentor. However, experience and literature data are very limited for continuous simultaneous saccharification and fermentation (cSSF) processes. In this work, a slurry feed system was developed and applied to a 3-stage bench-scale cSSF train to convert pretreated corn stover to ethanol and determine the effects of dilution rate and number of fermentation vessels on overall volumetric productivity. The highest productivity of 0.4 g L−1 h−1 was achieved in a single cSSF vessel with an 8 h residence time. Furthermore, productivity at identical total residence times was 12% higher for operation with 3 cSSF stages than for a single CSTR stage for pretreated corn stover.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Agricultural, Forest and Food Sciences HAFL > Resource-efficient agricultural production systems School of Agricultural, Forest and Food Sciences HAFL > Agriculture
Name:	Brethauer Studer, Simone0000-0001-7755-7593; Studer, Michael Hans-Peter0000-0003-1083-0967 and Wyman, Charles E.
Subjects:	S Agriculture > S Agriculture (General) T Technology > T Technology (General)
ISSN:	09608524
Publisher:	Elsevier
Language:	English
Submitter:	David Zimmer
Date Deposited:	04 Nov 2019 14:37
Last Modified:	18 Dec 2020 13:29
Publisher DOI:	10.1016/j.biortech.2014.07.049
Uncontrolled Keywords:	Lignocellulosic biomass; Ethanol; Simultaneous saccharification and fermentation (SSF); Continuous fermentation; Dilute acid pretreatment
ARBOR DOI:	10.24451/arbor.8320
URI:	https://arbor.bfh.ch/id/eprint/8320