TITLE:
Overflow Controlled Declining Rate Filtration: A Conceptual Design for Increased Flexibility and Dynamism
AUTHORS:
Ababu T. Tiruneh, Tesfamariam Y. Debessai, Gabriel C. Bwembya, Stanley J. Nkambule
KEYWORDS:
Water Treatment, Filtration, Declining Rate Filters, Variable Rate Filters, Constant Rate Filters, Filter Run
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.11 No.10,
October
11,
2019
ABSTRACT: A declining rate filter operating through over flow control mode is proposed
in this paper with a view to improving the overall performance of declining
rate filters. Traditional declining rate filters have in-built self-adjustment of
flow rates among the filters assisted with downstream orifice for flow control
with limited flexibility for further adjustment. The proposed design allows the
control of flow level and flow rates in individual filters, the water level in the
over flow distributor tank and offers increased flexibility in responding to
changes in filtration variables and optimising the overall performance of the
filters. The design set up can also operate as constant rate filter through setting
the water level in the distributor tank to the maximum.