Abstract:
A critical review of the solids removal mechanisms potentially operative in the filtration process have been presented. The mechanisms examined include; mechanical screening and straining; gravity setting; interception; impaction; Brownian diffusion; molecular forces; electrostatic forces; electro kinetic forces; and chemical forces. The mechanisms were viewed as describing either a transport step ( in which particles are moved to the surface of the medium) or an attachment step (in which particles adhere to the medium). An inquiry framework has been proposed which established the context in which the mechanisms were developed and have applicability for predicting solids removal. The postulated mechanism, particle removal have been briefly discussed and analyzed. It is shown from the synthesis of the evaluation of the mechanisms that no data or theoretical analysis presently available indicate that one mechanism is responsible for particle removal or controlling in the transport or attachment steps under any given set of physicochemical conditions.
Page(s):
13-20
DOI:
DOI not available
Published:
Journal: Mehran University Research Journal of Engineering and Technology, Volume: 2, Issue: 1, Year: 1983