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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 #404967
Research Project: Innovative Manure Treatment Technologies and Enhanced Soil Health for Agricultural Systems of the Southeastern Coastal Plain

Location: Coastal Plain Soil, Water and Plant Conservation Research

Title: Recovery of ammonia and phosphate resources wastewater using gas-permeable membranes

Author
item Vanotti, Matias
item DUBE, PATRICK - Water Environment Federation
item GARCIA-GONZALEZ, MARIA CRUZ - University Of Valladolid
item Szogi, Ariel

Submitted to: Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 6/26/2023
Publication Date: 7/26/2023
Citation: Vanotti, M.B., Dube, P., Garcia-Gonzalez, M., Szogi, A.A. 2023. Recovery of ammonia and phosphate resources wastewater using gas-permeable membranes. Proceedings, June 26-29, 2023, Girona,Spain.

Interpretive Summary: .

Technical Abstract: Phosphorus recovery was combined with ammonia recovery using gas-permeable membranes. In the first step, the ammonia and alkalinity were removed from municipal side-stream wastewater using a gas-permeable membrane manifold. In a second step, the phosphorus was removed using magnesium chloride (MgCl2) and reduced amounts of alkali. The side-stream wastewater contained 730 mg N/L, 140 mg P/L, and 2900 mg/L alkalinity. The process recovered approximately 79-93% of the ammonia and 80-100% of the phosphorus. The phosphates produced were very-high grade (42-44% P2O5) with a composition like the bio-mineral newberyite. However, lower-grade phosphate products (27-29% P2O5) were produced whenever the N recovery step was bypassed, or carbonate alkalinity was added. Therefore, removing ammonia and alkalinity is important in producing high-grade phosphate products.