Alterative Methods - What Is the Effectiveness?

The separation system developed by the LUW Team couples a stationary gravity screen-roll press separator with a gravity belt thickener utilizing a polyacylamide chemical flocculent. This system has been effective in removing 90+ percent of the TSS, 50 percent of the nitrogen, and 90+ percent of the phosphorus. The cost to separate the solid and liquid components of swine slurry and to land apply the separated effluent via center pivot irrigation has been around one cent per gallon of raw slurry. This compares favorably to the commercial cost for land applying raw, unprocessed slurry that ranges between 0.75 cents per gallon to 1.7 cents per gallon.

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University of Illinois at Urbana Champaign College of Agricultural Consumer & Environmental Sciences University of Illinois Extension