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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 #403619
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: Co-recovery of phosphorus and proteins from swine manure using fruit wastes

Author
item Vanotti, Matias
item Szogi, Ariel
item MORAL, RAUL - Miguel Hernandez University

Submitted to: Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/10/2023
Publication Date: 9/12/2023
Citation: Vanotti, M.B., Szogi, A.A., Moral, R. 2023. Co-recovery of phosphorus and proteins from swine manure using fruit wastes. Proceedings.

Interpretive Summary: .

Technical Abstract: A new approach for recovering nutrients and value-added products from waste is to search for a synergistic effect by combining two wastes (US Pat.10,710,937). This work improved the recovery of phosphorus and proteins/amino acids abundant in swine manure by adding a second waste – fruit waste - rich in sugars. Adding fruit waste to the manure and rapid fermentation produced abundant natural acids - lactic acid, citric acid, and malic acid – that effectively solubilized the phosphorus in the manure and facilitated its extraction. The solubilized phosphorus was precipitated with calcium or magnesium compounds, obtaining concentrated phosphate products with > 90% plant-available phosphorus. The proteins/amino acids in the manure were conserved and quantitatively recovered in a second step. The additional waste rich in sugars acted as a natural acid generator that replaced purchased acids and lowered the overall recovery cost from the manure.