TITLE:
Methodology for Evaluating and Monitoring of Waterworks Performance Efficiency—Part 2: Test of Filterability
AUTHORS:
Frantisek Hereit, Pavel Polasek
KEYWORDS:
Deep-Bed Filtration, Mechanistic Model of Filtration, Test of Filterability, Filtration Element, Length of Filtration Cycle
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.4 No.4,
October
14,
2014
ABSTRACT: The effectiveness of deep-bed
filtration with respect to suspension formed during the preceding processes is
evaluated by the test of filterability. The properties and concentration of the
suspension being filtered are affected by the efficiency of the preceding
aggregation and separation processes. The basic principles of the test of
filterability are based on the mechanistic model of filtration. The equations
in the mathematical model of the mechanistic conception of filtration are
derived from the theory of filtration. The arrangement of the pilot filtration
plant for the determination of filterability of flocculent suspension is
presented in this paper. The test of filterability is carried out with a
thin-layer filter element. The design of a filter element arrangement and its
installation are also disclosed in this paper. The inter-dependence of the
coefficient of filtration efficiency on the specific volume of intercepted
suspensions, filter media grain sizes and different filtration velocities are
graphically presented. In addition, the effect of the filter bed clogging
resulting from the properties of different suspensions on the head loss
generated, the length of filtration cycle and quality of filtrate produced are also shown in this paper.