Bioreactors in tile drains can reduce nitrogen by 25 percent

Posted March 31st, 2016 in Stormwater & Green Infrastructure
dredge

Dig it and forget it—that’s one of the biggest appeals of woodchip bioreactors, one of many nitrogen-reducing practices recommended in the Illinois Nutrient Loss Reduction Strategy.

The bacteria living in these long, narrow trenches remove nitrogen carried through farm tile lines through a process known as denitrificaiton. The result is an average annual nitrogen reduction of 25 percent for roughly 10 years—and with minimal maintenance for the farmer.

But don’t just take our word for it. Hear what University of Illinois researchers Mark David and Laura Christianson had to say about this conservation agriculture practice this video.

 

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Got a research idea worth a bigger room? The 2026 State of Lake Michigan Meeting is accepting proposals for symposia and workshops, and we want to hear yours!📅 Nov. 4–6 | Michigan City, IN⏰ Proposals due June 1 at 1 PM ETHelp shape what the Great Lakes research community discusses this year.🔗 Submit at the link in bio.

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To every educator who has brought the Great Lakes into their classroom, thank you. 🍎Your curiosity is contagious. Your lessons last. And the students who learn to love these waters? They’ll protect them.Happy Teacher Appreciation Week from all of us at IISG.

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Located in Washington, D.C., the Sea Grant Knauss Fellowship provides a unique educational and professional experience to graduate students who have an interest in ocean, coastal and Great Lakes resources, and in the national policy decisions affecting those resources. This is a one-year fellowship open to any student, regardless of citizenship, who is enrolled toward a degree in a graduate or professional program on the day of the deadline.Students enrolled at an Illinois or Indiana university or college should submit their applications through Illinois-Indiana Sea Grant by emailing Angela Archer at amcbride@purdue.edu. Students in surrounding states without a Sea Grant program should contact the National Sea Grant College Program at oar.sg.fellows@noaa.gov for a referral. Application deadline: June 3, 2026.To learn more about the fellowship, visit the link in bio.