Continuous bioethanol production from oilseed rape straw hydrosylate using immobilised Saccharomyces cerevisiae cells

• Published in: Bioresource technology 2014-02, Vol.154, p.248-253
• Main Authors: Mathew, Anil Kuruvilla, Crook, Mitch, Chaney, Keith, Humphries, Andrea Clare
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; Bioethanol; Biofuel production; Biofuels - microbiology; Biological and medical sciences; Bioreactors - microbiology; Biotechnology; Biotechnology - methods; Brassica rapa - chemistry; Canola Oil; Cells, Immobilized - cytology; Cells, Immobilized - metabolism; Discs; Disks; Energy; Energy recovery; Ethanol - metabolism; Fatty Acids, Monounsaturated; Fermentation; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Glucose - metabolism; Hydrolysates; Hydrolysis; Immobilisation; Industrial applications and implications. Economical aspects; Kinetics; Methods. Procedures. Technologies; Microbial engineering. Fermentation and microbial culture technology; Oilseed rape; Oilseed rape straw; Plant Oils - chemistry; Productivity; Saccharomyces cerevisiae; Saccharomyces cerevisiae - metabolism; Straw; Use of agricultural and forest wastes. Biomass use, bioconversion; Waste Products
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2013.12.044

•Continuous bioethanol production from OSR straw hydrolysate was investigated.•Maximum volumetric productivity of 12.88gL−1h−1 was achieved.•Energy recovery from bioethanol represents only 35% of biomass energy content. The aim of the study was to evaluate continuous bioethanol production from oilseed rape (OSR) straw hydrolysate using Saccharomyces cerevisiae cells immobilised in Lentikat® discs. The study evaluated the effect of dilution rate (0.25, 0.50, 0.75 and 1.00h−1), substrate concentration (15, 22, 40 and 60gL−1) and cell loading (0.03, 0.16 and 0.24gd.c.w.mL−1 Lentikat®) on bioethanol production. Volumetric productivity was found to increase with increasing substrate concentration from 15gL−1 to 60gL−1. A maximum volumetric productivity of 12.88gL−1h−1 was achieved at a substrate concentration of 60gL−1 and at a dilution rate of 0.5h−1. An overall mass balance for bioethanol production was created to determine the energy recovery from bioethanol and concluded that a biorefinery approach might be the most appropriate option for maximising the energy recovery from OSR straw.