Project Number: 6657-13630-003-06
Project Type: Specific Cooperative Agreement

Start Date: Aug 23, 2006
End Date: Sep 30, 2010

Objective:
Treat swine wastewater and derive energy products in a treatment wetting/mechanical treatment system.

Approach:
Solids from a swine barn flush wastewater will be treated to promote struvite formation and flocculation followed by solids separation. The remaining liquid will be low in phosphorus and moderate in ammonia concentrations; it will be treated in constructed wetlands microcosms to remove nitrogen alkalinity and pathogens. A final high pH treatment with calcium hydroxide will kill remaining pathogens and precipitate phosphorus. The phosphorus precipitate will be pumped to the beginning solids separation unit where it will be removed with the solids.