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  • Ethanol industry

Ethanol and Biofuels

Dürr designs and manufactures a comprehensive portfolio of air pollution control (APC) equipment for dry and wet ethanol mills, helping our customers stay in compliance with environmental regulations and contributing to a clean environment and public health by providing them with state-of-the-art environmental technologies.

In addition, Dürr designs and manufactures biogas purification systems for upgrading biogas streams to pipeline quality natural gas.

Air pollution control for ethanol

Our air pollution control solutions help our customers oxidize VOCs and odors, and remove particulate matter and acid gases from process gases to meet environmental regulations. Key air pollution control technologies offered to the ethanol market are regenerative thermal oxidizers, wet electrostatic precipitators, wet scrubbers, and heat recovery systems.

Regenerative Thermal Oxidizers

Environmental control technologies from Dürr are engineered specifically for the high-particulate moisture-laden flows coming from DDGS (distillers dried grains with solubles) drying, as well as the fermentation and centrate processes. The Oxi.X RC and Oxi.X RM RTOs are the most efficient, cost-effective, and trouble-free VOC and odor removal systems available for the ethanol and biofuels industry.

Secondary heat recovery options are available and the recovered energy can be returned to the process or used to reduce other plant energy requirements.

We also control the quality and performance of all Dürr units. We pre-assemble and pre-test modular components in our factory, which results in significant cost and time savings during installation and start-up.

Wet Scrubbers and Wet Electrostatic Precipitators

Dürr Part.X PW wet ESPs provide highly efficient control of submicron particulate matter upstream of an RTO for wet mills, which significantly minimizes bake-out frequency and maintenance. To further control acid gas emissions after the dryers, we offer a range of wet scrubbers, such as plug-resistant open spray towers and atomizing scrubber designs.

Biogas Upgrading

Dürr Sorpt.X SB biogas purification systems utilize water absorption technology to remove H2S, CO2, and light siloxanes from biogas streams. Biogas streams from digesters, wastewater treatment, landfill, or other biogas sources are upgraded. Designed to capture more than 98.5 percent of the methane and purify it to pipeline quality natural gas, the system uses a self-regenerating desiccant dryer to dry the product gas to a dew point of -40°F.

Learn more about biogas upgrading.