BioFuels Journal

Sioux Falls, SD—POET Biorefining - Hudson (S.D.) has eliminated wastewater discharge since installing POET’s proprietary Total Water Recovery system in February this year.

By filtering and recycling water used in the ethanol production process, the new system saves the plant and nearby communities more than 108,000 gallons of discharged water per day.

Previously, it took 3 gallons of water to produce 1 gallon of ethanol at the plant.

That has been cut to 2 gallons of water per gallon of ethanol.

Water leaving the plant is limited to process steam and water in byproducts such as Dakota Gold® dried distiller’s grains.

“POET is serious about lowering the environmental impact of ethanol production,” POET Chief Operating Officer James Moe said.

“This is a significant reduction in the amount of water used in the process, and it’s a clear example of how POET continues to devote its engineering and technical experience to making renewable fuel even better.”

Hudson’s system was installed using in-house talent with engineering assistance from POET headquarters.

“When this project and design was proposed to us, we jumped at the opportunity to become a more efficient and greener facility,” plant Maintenance Manager Trevor Enger said.

“We couldn’t get it done quickly enough.”

POET Biorefining - Hudson’s upgrade is part of a company-wide sustainability initiative called “Ingreenuity.”

The first goal of Ingreenuity is to cut water use at POET plants by a total of 1 billion gallons over the next five years, a 22 percent reduction.

“Fresh water is a precious natural resource that we do our utmost to conserve,” POET CEO Jeff Broin said at the Ingreenuity launch.

“We have seen tremendous efficiency gains in the 20 years I’ve been in this business, but we can and will continue to do better.”

For more information, call 605-965-2225.

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