Advances in Bioethanol by Pira International Ltd

By Pira International Ltd

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G. g. corn grits), or use pervaporation or membranes (Lynd, 1996). , 1999). The main solid residual from the process is lignin. Its amount and quality differs with feedstock and the applied process. Production of co-products from lignin, such as high-octane hydrocarbon fuel additives, may be important to the competitiveness of the process (US DOE, 2003). Lignin can replace phenol in the widely used phenol formaldehyde resins. Both production costs and market value of these products are complex.

In corn-based ethanol plants, the stillage (20% protein) is valuable as animal feed. Recycling of The water consumption is reduced by recirculating process streams for use in the process stream washing and hydrolysis steps (Palmqvist and Hahn-Hagerdal, 2000). Recirculating part of the dilute ethanol stream from the fermenter can increase the ethanol concentration in the feed to the distillation stage. , 1996). To increase the ethanol productivity, cell recycling has been employed by several workers while retaining the simplicity of the batch process.

These grants are critical to bringing cellulosic ethanol to the commercial market and underscore the important partnership that the federal government must have with the US ethanol industry to achieve both the short-term and long-term energy goals. These grants will help ethanol producers with the up-front capital costs associated with the construction of the cellulosic ethanol biorefineries. The DOE goal is to prove the feasibility of cellulosic ethanol technology. Recipients are entitled to up to $100 million and must show a 60% industry/40% government cost share.

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