2016
Drainage water quality from maure treated soybean crops: Bio-electrical modification of woodchip bioreactors for enhanced performance
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Contributor/Checkoff:
Iowa Soybean Association
Category:
Sustainable Production
Keywords:
Abiotic stressField management SustainabilityWater supply
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Michelle Soupir, Iowa State University
Co-Principal Investigators:
Natasha Hoover, Iowa State University
Thomas Moorman, Iowa State University
+1 More
Project Code:
450-20-06
Contributing Organization (Checkoff):
Iowa Soybean Association
(n/a)
Institution Funded:
Iowa State University
(n/a)
Brief Project Summary:

One emerging technology for nitrate removal from subsurface waters is the woodchip bioreactor. Limited research exists on the potential of these bioreactors to also reduce downstream transport of contaminants commonly detected in manure-amended cropland, including pathogens and phosphorous. This project pairs a lab study with field-scale studies of bioreactor phosphorous and bacterial removal. It also will inform design recommendations for bioreactor installation for multiple contaminants. The research also seeks to determine hydraulic retention time and flow path analysis for selected woodchip bioreactors and relate the hydrologic analysis to bioreactor performance and if denitrification in woodchip bioreactors can improved by electrical stimulation.

Key Benefactors:
farmers, agronomists, Extension agents, livestock farmers

Information And Results
Project Deliverables

KPI #1: Improved understanding of performance of woodchip bioreactors for removal of phosphorous and bacteria. As more livestock are reintegrated into the Iowa landscape, we need to improve understanding of the strategies available to remove multiple contaminants prior to tile drainage discharge to surface waters. Measured by outreach activities described below.

KPI #2: Data on measured hydraulic retention times in ISA demonstration bioreactors to determine of actual retention times differ from theoretical retention times based on reactor size. Measured by information generated to inform future bioreactor design.

KPI #3: Proof-of-concept data on electrical augmentation of woodchip bioreactors for improved NO3-N removal. Potential for reduced cost for nitrate removal on a per pound basis. Measured by the next step which is application of the concept at the pilot scale or as an on-farm demonstration.

Final Project Results

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.