A Stratified Activated Dry Sand Filter as an Alternative to Remove Iron and Manganese Concentrations in Ground Water Traetment Technology
The accurrence of iron and manganese in ground water may pose problems to community, i.e. produces a bitter taste and odor. Turns white clothes to yellowish ones and stains laundry and plumbing fixtures. Activated Dry Sand Filter (ADSF) could remove high iron and manganese concentrations. This research aims to identify the effect of the variation of filter media and its depth towards the removal of iron and manganese concentrations in a stratified ADSF. Two sand diameters ( 0.84 mm and 1.19 mm) are used in two different positions, i.e. variation 1.50 cm depth of 0.84 mm sand is put above 50 cm depth of 1.19 mm sand: whereas in variation H it is oppositely placed. Iron concentration can be lowered as to meet the Water Quality Standard (WQS) issued by Indonesian Republic Ministry of Health (No. 907/MENKES/SK/VII year 2002) (i.e. 0.3 mg/L and 0.1 mg/L for tolerable iron and manganese concertrations in drinking water respectively). This is generally happened in 20 cm depth although the efficiency of 93% to 100%. For manganese, it is only happened in 100 cm depth although the efficiency is 100%. The removal of tese substances in variation I is better than that of variation II. The dissolved oxygen concentrations. pH and turbidity range from 6.1 mg/L to 8.0 mg/L, 7.0 to 7.4 and 0.2 to 0.5 NTU subsequently. This ADSF is economically viable due to the cost is only Rp. 460/m3 comparated to the Perusahaan Daerah Air Minum Bandung (Bandung Water Supply Enterprise)’s water cost that is Rp. 880/m3 (for the first 10m3).
Di buat oleh: Racmawati S. Dj, Mohamad Rangga Sururi (rangsoer@yahoo.com), Dian Novita M.
Keyword : iron, manganese, sand diameter, sand or filter depth
Keterangan : Proceeding Environmental Technology and Management Conference 2006. ITB Bandung, ISBN 979-8456-21-1