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Alternative Methods – What Is the Effectiveness?

by 5m Editor
1 January 2012, at 12:00am

The Livestock and Urban Waste Research (LUW) Team at the University of Illinois outlines the efficacy of its new system for slurry separation into solid and liquid fractions. From Swine Waste Economical and Environmental Treatment Alternatives (SWEETA).

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+ per cent of the TSS, 50 per cent of the nitrogen, and 90+ per cent 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.

Further Reading

- You can view the other articles in this series from SWEETA by clicking here.
January 2012