Improvement of rainwater quality using the bio-sand filtration

Mohd Kassim, Amir Hashim (2006) Improvement of rainwater quality using the bio-sand filtration. In: National Conference On Water For Sustainable Development Towards A Developed Nation By 2020 , Guoman Hotel, Port Dickson.

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Abstract

Rainwater harvesting and utilization has been practiced in Malaysia especially in the villages since long time ago. The 1998 drought, which brought unpleasant water supply disruptions for the Kuala Lumpur folks, has created a surge of interest in rainwater harvesting. This paper looks at the current technology used in rainwater harvesting consists of collection area, gutters, down pipes, first flush system, storage tank and focusing on water quality using the Bio-sand filtration as a treatment system. This system is set up at the main campus KUiTTHO, Johor, Malaysia. A fine sand medium (d = 0.45mm, UC = 2.7, porosity(e)= 0.45, density(pp) = 2.65 g/ml) with 0.40 m depth was used to determine the effectiveness of the filtration system. Rainwater was collected from 15 storm rainfall events from February 2005 to April 2005. Samplings were taken from the effluent and influent of the system, and analysed for turbidity, total suspended solid, and pH. The results indicated that the Bio-sand filter could remove at maximum level 93% of turbidity ( ranged from 2.53 - 8.9 NTU after filtration), 92% of total suspended solid ( 3 - 17.6 mg/L ) and 34% of pH ( 6.29 - 6.86 ). This study shows that the Bio-sand filter improves the rainwater into a better quality water conform to the WHO Drinking Standard Guidelines and the Interim National River Water Quality Standards for Malaysia (within Class 1 and 2A) which makes its suitable for a variety of non potable uses.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:rainwater harvesting system; bio-sand filtration; water quality
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environment Engineering
ID Code:1826
Deposited By:Normajihan Abd. Rahman
Deposited On:04 Oct 2011 15:18
Last Modified:04 Oct 2011 15:18

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