𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The challenge of enzyme cost in the production of lignocellulosic biofuels

✍ Scribed by Daniel Klein-Marcuschamer; Piotr Oleskowicz-Popiel; Blake A. Simmons; Harvey W. Blanch

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
129 KB
Volume
109
Category
Article
ISSN
0006-3592

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

With the aim of understanding the contribution of enzymes to the cost of lignocellulosic biofuels, we constructed a techno‐economic model for the production of fungal cellulases. We found that the cost of producing enzymes was much higher than that commonly assumed in the literature. For example, the cost contribution of enzymes to ethanol produced by the conversion of corn stover was found to be $0.68/gal if the sugars in the biomass could be converted at maximum theoretical yields, and $1.47/gal if the yields were based on saccharification and fermentation yields that have been previously reported in the scientific literature. We performed a sensitivity analysis to study the effect of feedstock prices and fermentation times on the cost contribution of enzymes to ethanol price. We conclude that a significant effort is still required to lower the contribution of enzymes to biofuel production costs. Biotechnol. Bioeng. 2012; 109:1083–1087. Β© 2011 Wiley Periodicals, Inc.

πŸ“œ SIMILAR VOLUMES

The effect of feedstock cost on biofuel
The effect of feedstock cost on biofuel cost as exemplified by biomethane production from grass silage
✍ Joseph McEniry; Padraig O'Kiely; Paul Crosson; Elaine Groom; Jerry D. Murphy πŸ“‚ Article πŸ“… 2011 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 618 KB

## Abstract The potential variance in feedstock costs can have significant implications for the cost of a biofuel and the financial viability of a biofuel facility. This paper employs the Grange Feed Costing Model to assess the cost of on‐farm biomethane production using grass silages produced unde

The cost of production breaks
The cost of production breaks
✍ Jeffrey D. Camm; Norman Keith Womer πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 English βš– 351 KB

Disruptions in the production process can have a serious impact on production costs. Most of the previous literature which addresses the cost impact of production breaks attributes the observed increase in costs solely to "loss of learning." We develop a mathematical model which implies that breaks

Substrate and energy costs of the produc
Substrate and energy costs of the production of exocellular enzymes by Bacillus licheniformis
✍ J. Frankena; H. W. Van Verseveld; A. H. Stouthamer πŸ“‚ Article πŸ“… 1988 πŸ› John Wiley and Sons 🌐 English βš– 945 KB

Substrate and energy costs of the production of exocellular enzymes from glucose and citrate by B. licheniformis S1684 as well as molar growth yields corrected for these costs of product formation were calculated using data from chemostat experiments. The calculations showed that 1.46-1.73 mol gluco