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Título
A biorefinery approach to recover nutrients, proteins, and methane from raw swine manure
Autor
Año del Documento
2025
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Journal of Environmental Management, 2025, vol. 389, p. 126254
Resumen
The livestock industry is expanding rapidly, generating large amounts of manure rich in nutrients and energy.
This study develops a novel integrated biorefinery approach that combines multiple technologies to enable the
simultaneous recovery of nutrients, proteins and energy from pig manure, maximizing resource valorization and
economic returns. The technologies included gas-permeable membrane (GPM) to separate the ammonia, solid-
liquid separation to separate organic particles, acid-base solubilization to separate phosphorus and proteins
(SPP) from the particles, anaerobic digestion (AD) to produce biogas and combinations thereof. Using the GPM
method, nitrogen (N) concentrations were reduced by up to 90 %, with total ammonia nitrogen (TAN) recovery
rates ranging from 25 to 27 g N m 2 d 1. Solid-liquid separation did not significantly increase pH or N recovery.
The SPP method provided a phosphorus extraction efficiency of 114 % and a protein extraction efficiency of 86 %
from the solid fraction of pig manure. The methane yield was 1.9 times higher when nitrogen was recovered
before AD, while phosphorus and protein removal resulted in methane yields comparable to swine manure
(215.5 mL CH4 g 1 VS). A techno-economical study was carried out for the AD treatments proposed in the
biorefinery approach. High internal rates of return (IRR) were obtained, 21–37 %, and a return on the investment
in 3–5 years was obtained for all the treatments. This integrated strategy demonstrated a comprehensive and
economically viable solution for sustainable pig manure management and resource recovery.
Materias Unesco
3101 Agroquímica
Palabras Clave
Biorefinery
Swine manure
Anaerobic digestion
Gas-permeable membranes
Nutrient recovery
Techno-economic study
ISSN
0301-4797
Revisión por pares
SI
Patrocinador
This work has been funded by the European Union under the Project Life GREEN AMMONIA (LIFE20-ENV/ES/000858)
Agencia Estatal de Investigación (grant RYC-2020-029030-I/AEI/10.13039/501100011033)
Agencia Estatal de Investigación (grant RYC-2020-029030-I/AEI/10.13039/501100011033)
Version del Editor
Propietario de los Derechos
© 2025 The Author(s)
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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