| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 635410 | Journal of Membrane Science | 2011 | 9 Pages |
An assessment of the validity of the laws of filtration and their applications in filtration studies was made. It shows that the assumptions used in formulating some of the filtration rate expressions are incorrect. Furthermore, the experimentally determined relationship between d2t/dV2 and dV/dt was often found to be inconsistent or disagree with the laws of filtration. While applying the laws of filtration may provide information useful to develop empirical models of filtration performance, the same information can be readily obtained using alternative procedures and similar models may be developed with even greater ease independent of the laws of filtration.
► We assessed the assumptions and formulations of the laws of filtration commonly used in cross-flow and dead end filtration studies. ► The method of fitting higher order derivatives of filtrate fluxes to power law relationships and inferring the mechanism of filtration from the indexes can be questioned from a fundamental basis. ► It appears that some of the assumptions regarding the variation of filtrate flux with time when blocking or depth filtration mechanisms operate are invalid. ► There seems to be a necessity to interpret filtration data using more detailed models based on modern understanding of the fundamental physical processes involved.
