031458am a2200409 4500 20260817173113.0 011298s1986 th r 0000|00eng d .b10146106 AIT Thesis no. EV-86-22 Supunya Yonpiam Coliphage removal during water treatment processes Bangkok : Asian Institute of Technology, 1986 68 p. Thesis ; no. EV-86-22 A research study submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1986 The efficiency or a pilot water treatment plant consisting of mixing unit, Flocculation and sedimentation units, rapid sand filtration and chlorination stage was assessed in removing coliphages from raw water containing artificially high levels of coliphages. The individual processes achieved removal to different degrees. The flocculation and sedimentation units yielded the highest removal of 93% at an alum dose of 320 mg/L. In addition with the batch study, coliphage removal by the flocculation process was independent of changes in turbidity of the raw water, the extended detention time of flocculation time; but, it was affected by the types and doses of coagulant used. Alum, ferric chloride and cationic polyelectrolyte were satisfactory coagulants to remove coliphage and turbidity from the water, Increased dosages increased both removals to some extent. The efficiency of coliphage removal in rapid sand filtration was low, ranging from 2.3 to 38.6 % The final chlorination stage was the most effective in removing coliphages and effluent coliphage could not be detected by plaque-assay method when residual chlorine was maintained at 0.4-0.6 mg/L. The total removal of the plant resulting from these subsequent units was considered 100 %. Water Purification Flocculation Hanaki, Keisuke, Chairperson Chongrak Polprasert, Examination Committee Shin, Hang-Sik, Examination Committee Carl Duisberg Gesellschaft e.v., Scholarhship Donor Asian Institute of Technology. Thesis ; no. EV-86-22 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19650 .b10146106 mnait x 240411 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003043535 CREATED : 1994-05-16 RECORD # : i10171009 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003043543 CREATED : 1994-05-16 RECORD # : i10171010 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120223960 CREATED : 2016-09-05 RECORD # : i12973038 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 18734 18734 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-86-22 30050003043535 2026-08-17 17:31:13 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-86-22 30050003043543 2026-08-17 17:31:13 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-86-22 30050120223960 2026-08-17 17:31:13 2026-08-17 40