RT info:eu-repo/semantics/article T1 Phosphorus recovery from organic waste for its agronomic valorization: technical and economic evaluation A1 Fernández Delgado, Marina A1 Amo Mateos, Esther del A1 García Cubero, María Teresa A1 Coca Sanz, Mónica A1 Lucas Yagüe, Susana K1 Municipal mixed waste compost K1 Phosphorus recovery K1 Kinetic study K1 Organic waste recycling K1 Circular economy K1 23 Química K1 33 Ciencias Tecnológicas AB The present work investigates the use of municipal mixed waste compost (MMWC) residue for phosphorus(P) recycling from a technical, economic, and environmental perspective. The study aims to obtain liquid extracts rich in P from MMWCwith a low heavy metals content, suitable for their subsequent precipitation in the struvite form. The effect of inorganic (sulfuric/nitric)and organic (oxalic/citric) acids at different molarities and temperatures was studied using technical analysis. The preliminary eco-nomic analysis allows the costs of the extraction section for the optimal extraction strategies to be estimated and compared.RESULTS: Based on the multilevel factorial design, the P extraction optimization shows that sulfuric acid 0.5 M and 30 °C pro-vided the highest P extraction yield, 94.2%. However, oxalic acid 0.1 M and 30 °C is the best choice to maximize the P extractionyield, while also minimizing the heavy metals concentration, reaching a P recovery of 2.5 g P/kg. The extraction kinetics for alltested acids were satisfactorily modelled using a second-order model (r2> 0.99). The preliminary economic analysis, estimatedfor a P extraction pilot plant of 100 kg h−1of MMWC, noted that sulfuric acid 0.5 M provided the lowest total investment cost(130 000 €) and a minimum sale price of theoretical struvite at 4.96 €/kg.CONCLUSION: MMWC is a promising raw material for P recycling as fertilizer due to an appreciable P concentration (7 g P/kg),which can be used together with other residues rich in P to obtain an economical and sustainable extraction process. PB Wiley SN 0268-2575 YR 2021 FD 2021 LK https://uvadoc.uva.es/handle/10324/49030 UL https://uvadoc.uva.es/handle/10324/49030 LA eng NO Journal of Chemical Technology & Biotechnology, 2022, vol. 97, n. 1, p. 167–178. NO Producción Científica DS UVaDOC RD 24-nov-2024