RT info:eu-repo/semantics/article
T1 A systematic study of ammonia recovery from anaerobic digestate using membrane-based separation
A1 Rivera Mejía, Fanny Maritza
A1 Muñoz Torre, Raúl
A1 Prádanos del Pico, Pedro Lourdes
A1 Hernández Giménez, Antonio
A1 Palacio Martínez, Laura
K1 Ingeniería química
K1 Procesos químicos
K1 Transferencia de masa
K1 Ammonia recovery
K1 Anaerobic digestate
K1 Flat sheet membranes
K1 Recuperación de amonio
K1 Digestato anaeróbico
K1 Membranas de láminas planas
K1 2210 Química Física
K1 3303.03 Procesos Químicos
AB Ammonia recovery from synthetic and real anaerobic digestates was accomplished using hydrophobic flat sheet membranes operated with H2SO4 solutions to convert ammonia into ammonium sulphate. The influence of the membrane material, flow rate (0.007, 0.015, 0.030 and 0.045 m3 h−1) and pH (7.6, 8.9, 10 and 11) of the digestate on ammonia recovery was investigated. The process was carried out with a flat sheet configuration at a temperature of 35 °C and with a 1 M, or 0.005 M, H2SO4 solution on the other side of the membrane. Polytetrafluoroethylene membranes with a nominal pore radius of 0.22 µm provided ammonia recoveries from synthetic and real digestates of 84.6% ± 1.0% and 71.6% ± 0.3%, respectively, for a membrane area of 8.6 × 10−4 m2 and a reservoir volume of 0.5 L, in 3.5 h with a 1 M H2SO4 solution and a recirculation flow on the feed side of the membrane of 0.030 m3 h−1. NH3 recovery followed first order kinetics and was faster at higher pHs of the H2SO4 solution and recirculation flow rate on the membrane feed side. Fouling resulted in changes in membrane surface morphology and pore size, which were confirmed by Atomic Force Microscopy and Air Displacement Porometry.
PB MDPI
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59103
UL https://uvadoc.uva.es/handle/10324/59103
LA eng
NO Membranes, 2022, vol. 12, n. 1, 19
NO Producción Científica
DS UVaDOC
RD 04-dic-2024