Ethanol Production Emissions
Keeping Ethanol Production Green
Drying distilled grains during ethanol production creates a mixture of volatile organic compounds, odors and aerosols which are regulated as air pollutants and can be destroyed using thermal oxidizer technologies.
Stainless Steel RTOs for Ethanol Emissions and Odors
A 42 million gallon expansion at an ethanol production plant in Nebraska was certain to put the dry mill out of emission compliance for Hazardous Air Pollutants, Volatile Organic Compounds, carbon monoxide, nitrogen oxides, and particulate matter.
Renewable energy plants are expanding and being developed at a significant rate in North America and throughout the world. In the United States, the Clean Air Act for reformulated gasoline (RFG) mandates a 2wt.% oxygen requirement, driving the demand for more production. Ethanol is the most viable additive because it is a clean-burning fuel produced from renewable, domestic biomass sources. However, the production of these fuels can result in unacceptable levels of volatile organic compounds (VOCs), carbon monoxide (CO), nitrogen oxides (NOx), particulate matter (PM) and hazardous air pollutants (HAPs), all regulated by environmental agencies.
In most cases, ethanol production facilities in the United States are permitted to operate as a 'minor source' status as long as the total tonnage of key pollutants are below the 250 tons per year limit. Operating restrictions, penalties and fines, as well as community pressures are forcing many plants to strive for the lowest possible emission levels, enabling future capacity expansions.
Anguil's first experience with emission destruction for this process stream came in 1984 in the baking industry and has expanded today into corn-based and cellulosic ethanol and biofuels processing applications. Consultants, design / build firms and ethanol producers have all trusted Anguil to provide an energy-efficient, reliable solutions to kiln and dryer emission control needs. We offer two solutions for the ethanol and biodiesel industries:
- A Regenerative Thermal Oxidizer. Advantages include 98-99% efficiency in destroying pollutants, 95% thermal energy recovery insuring lower fuel usage & a fuel injection system to further lower NOx.
- A Direct-Fired Thermal Oxidizer with Waste Heat Boiler. Advantages are 99%+ destruction of VOCs, HAPs, CO & organic particulate, steam generation for process use, lower capital cost of plant and air emissions and an optional turbine to produce power for electric motors or for distribution throughout the plant.