Assessing the Removal of Turbidity and Coliform Transport through Canal-Bed Sediment at Lab-Scale: Column Experiments

• Published in: Mehran University research journal of engineering and technology Vol. 36; no. 4; pp. 995 - 1008
• Main Authors: Kandhar, Imdad Ali, Khaskheli, Ghous Bux, Sahito, Abdul Razaque, Mahar, Rasool Bux
• Format: Journal Article
• Language: English
• Published: Mehran University of Engineering and Technology, Jamshoro, Pakistan 01-10-2017; Mehran University of Engineering and Technology
• Subjects: Engineering Sciences; Grain Size Distribution; Ground Water; Hydraulic Conductivity; Particulate Organic Matter; Surface Water; Total Coliforms; Turbidity; Ground Water; Surface Water; Particulate Organic Matter; Hydraulic Conductivity; Total Coliforms; Turbidity; Grain Size Distribution
• ISSN: 0254-7821; 2413-7219
• DOI: 10.22581/muet1982.1704.24

This study was conducted at lab scale to determine the performance of the canal-bed for the removal of turbidity and microorganisms TC (Total Coliforms) from surface water. The canal-bed sediments were collected and analyzed for the characteristics of sediments for grain size distribution, hydraulic conductivity and the POM (Particulate Organic Matter) percent. Canal-bed sediments were containing fine particles<0.075mm in the range of 40-58%, with hydraulic conductivity averaged 7ft/day, and the POM 2.75%. The water samples collected from the canal-water have shown average POM 3.6%. Theremoval-reduction in turbidity and TC were determined through the column experiments on the canal-bed sediments. Three columns were prepared at lab-scale by using prepared canal-bed sediment as a filter-bed in the columns for the filtration of raw water samples. Fine particles of the canal-bed grain size D 10 0.2 and D 10 0.1mm were selected for the filter-bed formation. The prepared concentrated and diluted influent water samples containing turbidity and TC were passed through the washed filter-bed into the columns for 8-weeks filter run. The frequency of sampling and analysis were followedafter the interval of one-week run, the influent (raw water) and effluent (filtered) water samples were collected and analyzed for the turbidity and TC concentrations. The performance of the grain size D 10 0.1mm have shown 95-99.95% reduction in turbidity and TC compared to the larger grain size having D 10 0.2mm particles.