Title: Performance of horizontal flow roughing filter using limestone media for the removal of turbidity, suspended solids, biochemical oxygen demand and coliform organisms from wastewater

Authors: Mohd. Nordin Adlan, Hamidi Abdul Aziz, Han Thein Maung, Yung-Tse Hung

Addresses: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115-2214, USA

Abstract: This paper examines and evaluates the removals of turbidity, suspended solids, BOD and coliform organisms from wastewater using different sizes of limestone roughing filter. Results indicated that removal efficiencies depended on the size of the filter medium and applied flow rates. Turbidity, suspended solids, BOD and coliform organisms removals were between 75% and 92%, 79% and 88%, 51% and 67% and 67% and 96%, respectively, in a combination of the three filter media with particle sizes between 1.91 mm and 16.28 mm. Removal efficiency was found to increase with slower flow rates.

Keywords: limestone; roughing filter; turbidity; suspended solids; coliform organisms; horizontal flow; wastewater treatment; biochemical oxygen demand; BOD.

DOI: 10.1504/IJEWM.2008.018243

International Journal of Environment and Waste Management, 2008 Vol.2 No.3, pp.203 - 214

Published online: 13 May 2008 *

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