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 29-dic-2024