TY - JOUR
T1 - Robust magnetic vivianite recovery from digested sewage sludge
T2 - Evaluating resilience to sludge dry matter and particle size variations
AU - Nguyen, H.V.
AU - Prot, T.
AU - Wijdeveld, W.
AU - Korving, L.
AU - Dugulan, A. I.
AU - Brück, E.
AU - Haarala, A.
AU - van Loosdrecht, M. C.M.
PY - 2024
Y1 - 2024
N2 - Phosphorus recovery via vivianite extraction from digested sludge has recently gained considerable interest. The separation of vivianite was demonstrated earlier at the pilot scale, and operational parameters were optimized. In this study, we tested the robustness of this technology by changing the sludge characteristics, such as dry matter, and via that, sludge viscosity, and vivianite particle size. It was proven that the main factor influencing recovery was the concentration of vivianite in the feed. The technology can extract vivianite even when the sludge has higher dry matter (1.8% - 3.3%) and, therefore, higher viscosity. Smaller vivianite sizes (< 10 µm) can still be recovered but at a lower rate. This made magnetic separation applicable to a wide range of wastewater treatment plants.
AB - Phosphorus recovery via vivianite extraction from digested sludge has recently gained considerable interest. The separation of vivianite was demonstrated earlier at the pilot scale, and operational parameters were optimized. In this study, we tested the robustness of this technology by changing the sludge characteristics, such as dry matter, and via that, sludge viscosity, and vivianite particle size. It was proven that the main factor influencing recovery was the concentration of vivianite in the feed. The technology can extract vivianite even when the sludge has higher dry matter (1.8% - 3.3%) and, therefore, higher viscosity. Smaller vivianite sizes (< 10 µm) can still be recovered but at a lower rate. This made magnetic separation applicable to a wide range of wastewater treatment plants.
KW - Magnetic separation
KW - Particle size
KW - Phosphorus recovery
KW - Pilot scale operation
KW - Sludge viscosity
KW - Vivianite
UR - http://www.scopus.com/inward/record.url?scp=85203859757&partnerID=8YFLogxK
U2 - 10.1016/j.watres.2024.122407
DO - 10.1016/j.watres.2024.122407
M3 - Article
C2 - 39276473
AN - SCOPUS:85203859757
SN - 0043-1354
VL - 266
JO - Water Research
JF - Water Research
M1 - 122407
ER -