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008			011298s1986 th r 0000|00eng d
035			_a.b10146106
099		9	_aAIT Thesis no. EV-86-22
100	0		_aSupunya Yonpiam
245	1	0	_aColiphage removal during water treatment processes
260			_aBangkok : _bAsian Institute of Technology, _c1986
300			_a68 p.
490	1		_aThesis ; _vno. EV-86-22
500			_aA research study submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1986
520			_aThe 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 %.
650		0	_aWater _xPurification _xFlocculation
700	1		_aHanaki, Keisuke, _eChairperson
700	0		_aChongrak Polprasert, _eExamination Committee
700	1		_aShin, Hang-Sik, _eExamination Committee
710	2		_aCarl Duisberg Gesellschaft e.v., _eScholarhship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-86-22
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B19650
907			_a.b10146106 _bmnait _cx
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