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ARS Home » Southeast Area » Florence, South Carolina » Coastal Plain Soil, Water and Plant Conservation Research » Research » Publications at this Location » Publication #343420

Research Project: Improvement of Soil Management Practices and Manure Treatment/Handling Systems of the Southern Coastal Plain

Location: Coastal Plain Soil, Water and Plant Conservation Research

Title: Recovery of ammonia and production of high-grade phosphates from digester effluents (municipal and livestock)

item Vanotti, Matias
item Dube, Patrick
item Szogi, Ariel
item GARCIA-GONZALEZ, MARIA - Instituto Tecnológico Agrario De Castilla Y León (ITACYL)

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/20/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Phosphorus (P) recovery of anaerobically digested swine wastewater and side-stream municipal wastewater via magnesium precipitation was enhanced by combining it with the recovery of ammonia (NH3) through gas-permeable membranes and low-rate aeration. The low-rate aeration stripped the natural carbonate in the wastewater and increased pH, which accelerated NH3 uptake in the gas-permeable membrane system and benefited P recovery. The combined process provided quantitative (ca 100%) P recovery efficiencies. With active NH3 extraction, the magnesium phosphates produced contained higher phosphate grade (P2O5 = 44-46%) and lower nitrogen (N), similar to the composition of the biomineral newberyite.