TY - JOUR
T1 - Hollow fiber ultrafiltration
T2 - The concept of partial backwashing
AU - van de Ven, W.J.C.
AU - Pünt, I.G.M.
AU - Zwijnenburg, A.
AU - Kemperman, A.J.B.
AU - van der Meer, W.G.J.
AU - Wessling, Matthias
PY - 2008
Y1 - 2008
N2 - In dead-end hollow fiber filtration with humic acid solutions, we observed that the humic material accumulates in the final part of the fiber. We proved the hypothesis that backwashing of the last part of the fiber is sufficient to operate the filtration process in a sustainable manner. This strategy works very well for feed solutions that result in either local accumulation of the material at the end of the fiber, or that form a well-defined concentration polarization layer that does not lead to deposition. When deposition throughout the whole module occurs, the proposed cleaning strategy is unsuccessful. This overall deposition occurs when a force balance over the particle, results in net transport to the membrane surface over the entire length of the module. We simulated such conditions by the addition of calcium to the feed solutions. The latter results in large aggregates carried towards the whole membrane area by convective water flow, and an increased interaction between the aggregates and the membrane
AB - In dead-end hollow fiber filtration with humic acid solutions, we observed that the humic material accumulates in the final part of the fiber. We proved the hypothesis that backwashing of the last part of the fiber is sufficient to operate the filtration process in a sustainable manner. This strategy works very well for feed solutions that result in either local accumulation of the material at the end of the fiber, or that form a well-defined concentration polarization layer that does not lead to deposition. When deposition throughout the whole module occurs, the proposed cleaning strategy is unsuccessful. This overall deposition occurs when a force balance over the particle, results in net transport to the membrane surface over the entire length of the module. We simulated such conditions by the addition of calcium to the feed solutions. The latter results in large aggregates carried towards the whole membrane area by convective water flow, and an increased interaction between the aggregates and the membrane
KW - 2024 OA procedure
U2 - 10.1016/j.memsci.2008.04.037
DO - 10.1016/j.memsci.2008.04.037
M3 - Article
SN - 0376-7388
VL - 320
SP - 319
EP - 324
JO - Journal of membrane science
JF - Journal of membrane science
IS - 1-2
ER -