Biomass for electricity and process heat at ethanol plants

R. Vance Morey, Douglas G Tiffany, Dennis L. Hatfield

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Biomass can provide electricity and process heat at dry-grind ethanol plants to both reduce costs and improve the net energy value of ethanol production. Distillers dried grains with solubles (DDGS), which are coproducts of ethanol production, can potentially be used for energy. Cornstover is another potential biomass energy source for ethanol plants. Biomass (DDGS and cornstover) alternatives to provide process heat and electricity at corn dry mill ethanol plants are evaluated. Corn dry grind ethanol production using biomass (DDGS or cornstover) to meet process energy needs and generate electricity achieves net energy values in the range of 20 to 30 MJ/L (72,000 to 108,000 Btu/gal) of ethanol, which equals or exceeds previous estimates for biomass ethanol production. There are significant annual energy cost savings/returns fora 150 million liter (40 million gallon) per year plant capacity over a range of natural gas and biomass prices to apply to additional capital and operating costs required for a biomass energy system. Electricity generation is potentially an important contributor to the annual energy cost savings/returns because of the ability to effectively use waste heat from electricity generation to meet process energy needs. An important next step is to evaluate capital and operating costs of biomass combustion/gasification, emission control, biomass fuel handling, and electricity generation technologies to determine overall economic feasibility.

Original languageEnglish (US)
Title of host publication2005 ASAE Annual International Meeting
StatePublished - Dec 1 2005
Event2005 ASAE Annual International Meeting - Tampa, FL, United States
Duration: Jul 17 2005Jul 20 2005

Other

Other2005 ASAE Annual International Meeting
CountryUnited States
CityTampa, FL
Period7/17/057/20/05

Keywords

  • Biomass
  • Combined heat and power
  • Electricity
  • Ethanol production
  • Process heat

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