A pilot project is underway in the Grand Lake St. Marys watershed to test a nutrient removal system for dairy and swine manure. The project is spearheaded by Ag Solutions in partnership with KDS Separation, Chemtron, and InNow Water & Environmental Services, Katharos Scientific, LLC, and a local farmer.

If proven effective and economical, the system could be a mobile or on-farm unit capable of dewatering manure and creating a salable calcium phosphate byproduct, thereby removing nutrients from the watershed.

Ag Solutions Coordinator Theresa Dirksen shared the following key points, photos, and videos:

  • The KDS Separator is being used to dewater both liquid dairy and liquid swine manure
  • Trials have been run both with and without polymer
  • Testing is underway to analyze the raw manure, the separated solids, and the liquid effluents from each run
  • This will help optimize the dewatering efficiency and economics
  • Starting the week of March 19th, we hope to be running the liquid effluent through a secondary treatment unit, which uses no chemicals (the goal is to make the process chemical free so the only associated costs are electricity to run the system)
  • The secondary unit uses ionized and magnetized air to float additional nutrients to the top of the liquid. These nutrients will be in a semi-solid form that will be scraped off the top
  • Lab testing will also be conducted to determine efficiency
 LEARN MORE. Read William Kincaid’s article in The Daily Standard.  



Photos and videos provided by Theresa Dirksen, Ag Solutions