Water Science & Technology: Water Supply Vol 1 No 2 pp 65–72 © IWA Publishing 2001
A new look at filter backwash hydraulics
Ö Akgiray* and AM Saatçı**
*
Marmara University, Faculty of Engineering,
Environmental Engineering Department, Göztepe 81040, Istanbul, Turkey
**
Marmara University, Faculty of Engineering,
Environmental Engineering Department, Göztepe 81040, Istanbul, Turkey
ABSTRACT
A new approach to model media expansion during filter backwash is
presented. The proposed approach is based on the assumption that the Ergun
equation remains valid after fluidization. Mathematical formulas are
derived for predicting expanded porosity for a given backwash velocity
or backwash velocity for a given expanded porosity. These formulas can
be easily used by the engineer. Values predicted using the proposed
approach are in good agreement with experimental measurements.
Full article (PDF Format)
PAY-PER-VIEW: Buy this article for £20.00 (IWA MEMBER PRICE: £15.00)
|
