03124nas|a2200385 i 4500 20260818090652.0 040430s2003 th u m rtt 00| a1eng d .b11924044 AIT Thesis no.EV-03-18 Singphet Keothongnin Development of a low cost household drinking water purification system for rural areas Pathum Thani, Thailand : Asian Institute of Technology, 2003 99 p.: ill. Thesis ; no. EV-03-18 Thesis (M.Eng.) - Asian Institute of Technology, 2003 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. In this study the experiment is mainly focus on the pretreatment of raw water by introducing actizyme before passing it through the SSF combine with GAC and ACF. The study is also conducted to find out the removal efficiency of this combined treatment unit for the removal of organic and inorganic substances such as turbidity, color, TSS, COD, Iron, Manganese, Copper, Lead, coliform and chlorophyll-a. The shape of the filter unit was in rectangular tank, with the size of 60 cm length, 20 cm width and 70 cm height. The volume of the tank for the pretreatment of raw water and its filtration rate are 42 L and 2.6 Limn, respectively. Optimum dose of actizyme for the pretreatment of raw water was found to be 10 mg/l, which can remove the turbidity of 40 % and color of 66.6 % after four days of batch operation. The proposed household water filter was able to remove 73 % of turbidity, 94 % of color, 100 % of TSS, 83.9 % of manganese, 73 % of Iron, 95.41 % of copper, 87.24 % of lead, 80.8 % of COD, 100 % of chlorophyll-a and coliform. Removal efficiency of color after sand bag was 41.2 %, while after fine sand layer 53. l % and after GAC and ACF 88.6 %. In case of COD, the removal efficiency has increased at each stage 22.2 %, 57.0 % and 92.6 % respectively. From the results obtained it can be justified that the water treatment system has a great potential to use in rural areas of the developing countries. Drinking water Purification Lee, Seung Hwan, Chairperson Satoh, Hiroyasu, Examination Committee Nguyen, Thi Kim Oanh, Examination Committee Swedish International Development Agency (SIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-03-18 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08240 .b11924044 mnait u 240417 0 040430 m a u 0 mnait mnarc 22 40 Barcode : 30050120706659 CREATED : 2014-04-02 RECORD # : i12755928 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160051222 CREATED : 2016-05-25 RECORD # : i12990449 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 28816 28816 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-03-18 30050120706659 2026-08-18 09:06:52 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-03-18 30050160051222 2026-08-18 09:06:52 2026-08-18 40