Ulster University Logo

Ulster Institutional Repository

Bioconversion of starch to ethanol in a single-step process by coculture of amylolytic yeasts and Saccharomyces cerevisiae 21

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Verma, G, Singh - Nee Nigam, Poonam, Singh, D and Chaudhary, K (2000) Bioconversion of starch to ethanol in a single-step process by coculture of amylolytic yeasts and Saccharomyces cerevisiae 21. BIORESOURCE TECHNOLOGY, 72 (3). pp. 261-266. [Journal article]

Full text not available from this repository.

Abstract

Ethanol production by a coculture of Saccharomyces diastaticus and Saccharomyces cerevisiae 21 was 24.8 g/l using raw unhydrolysed starch in a single-step fermentation. This was 48% higher than the yield obtained with the monoculture of S. diastaticus (16.8 g/l). The maximum ethanol fermentation efficiency was achieved (93% of the theoretical value) using 60 g/l starch concentration. In another coculture fermentation with E. capsularis and S. cerevisiae 21, maximum ethanol yield was 16.0 g/l, higher than the yield with the monoculture of Endomycopsis capsularis. In batch fermentations using cocultures maximum ethanol production occurred in 48 h of fermentation at 30 degrees C using 60 g/l starch. Fermentation efficiency was found lower in a two-step process using sr-amylase and glucoamylase-treated starch. (C) 1999 Elsevier Science Ltd. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Infection and Immunity/Microbiology
ID Code:5513
Deposited By:Dr Poonam Singh - Nee Nigam
Deposited On:21 Dec 2009 11:02
Last Modified:04 Aug 2011 09:48

Repository Staff Only: item control page