Open AccessInfluence of grain size distribution towards improvements of turbidity, colour and suspended particles in a riverbank filtration process - a column study
Author(s) -
Mohamad Fared Murshed,
Ahmad Zulfahmi Mohd Kamaruzaman,
Nurul Aiin Ab Aziz,
Nurul Hana Mokhtar Kamal
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/920/1/012006
Subject(s) - turbidity , filtration (mathematics) , suspended solids , total suspended solids , filter (signal processing) , environmental science , slow sand filter , hydraulic conductivity , porosity , particle size distribution , water column , environmental engineering , hydrology (agriculture) , geology , mineralogy , soil science , water treatment , geotechnical engineering , particle size , chemical oxygen demand , wastewater , mathematics , paleontology , oceanography , statistics , computer science , computer vision , soil water
Riverbank filtration (RBF) system is an efficient and natural treatment technology which, consists of high capacity pumping wells, located adjacent to river. It takes advantage of natural attenuation processes that occur as surface water infiltrate through the riverbed to produce potable water. This research determined the influence of media size distribution, and its hydraulic conductivity and porosity as filter media, of sand and gravel. The efficiency of column model for riverbank filtration system to remove turbidity, colour and suspended solids was also determined. The best condition of column model to remove contaminants with different flowrates and different types filter media used was identified through this research. The column study was conducted with three different types of filter media; C1 (sand), C2 (gravel) and C3 (sand + gravel) and with three different flowrates; 20 mL/min, 25 mL/min and 40 mL/min. Based on the results, C3 (sand + gravel) shows the highest percentage removal for turbidity, colour and suspended solids, which were 28.5%, 59.1%, 71.4% and 29.4%, respectively, although at difference flowrates. The highest percentage of removal of suspended solids (71.4%) occurs at 25 mL/min. The highest percentage of removal of colour (59.1%) occurs at 40 mL/min. Longer contact time might improve the removal of these contaminants.