当前位置： SCI文献检索 > JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY期刊下所有文献 > Very high gravity (VHG) ethanolic brewing and fermentation: a research update.

Very high gravity (VHG) ethanolic brewing and fermentation: a research update.

Abstract：

:There have been numerous developments in ethanol fermentation technology since the beginning of the new millennium as ethanol has become an immediate viable alternative to fast-depleting crude reserves as well as increasing concerns over environmental pollution. Nowadays, although most research efforts are focused on the conversion of cheap cellulosic substrates to ethanol, methods that are cost-competitive with gasoline production are still lacking. At the same time, the ethanol industry has engaged in implementing potential energy-saving, productivity and efficiency-maximizing technologies in existing production methods to become more viable. Very high gravity (VHG) fermentation is an emerging, versatile one among such technologies offering great savings in process water and energy requirements through fermentation of higher concentrations of sugar substrate and, therefore, increased final ethanol concentration in the medium. The technology also allows increased fermentation efficiency, without major alterations to existing facilities, by efficient utilization of fermentor space and elimination of known losses. This comprehensive research update on VHG technology is presented in two main sections, namely VHG brewing, wherein the effects of nutrients supplementation, yeast pitching rate, flavour compound synthesis and foam stability under increased wort gravities are discussed; and VHG bioethanol fermentation studies. In the latter section, aspects related to the role of osmoprotectants and nutrients in yeast stress reduction, substrates utilized/tested so far, including saccharide (glucose, sucrose, molasses, etc.) and starchy materials (wheat, corn, barley, oats, etc.), and mash viscosity issues in VHG bioethanol production are detailed. Thereafter, topics common to both areas such as process optimization studies, mutants and gene level studies, immobilized yeast applications, temperature effect, reserve carbohydrates profile in yeast, and economic aspects are discussed and future prospects are summarized.

journal_name

J Ind Microbiol Biotechnol

journal_title

Journal of industrial microbiology & biotechnology

authors

Puligundla P,Smogrovicova D,Obulam VS,Ko S

doi

10.1007/s10295-011-0999-3

subject

Has Abstract

pub_date

2011-09-01 00:00:00

pages

1133-44

issue

eissn

1367-5435

issn

1476-5535

journal_volume

pub_type

杂志文章,评审

在线工具

Very high gravity (VHG) ethanolic brewing and fermentation: a research update.