000			03090nas a2200397 4500
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008			301098s1983 th r 000| 0eng d
035			_a.b10109882
099		9	_aAIT Thesis no. EV-83-23
100	1		_aShin, Hyun Kook
245	1	0	_aBehaviour of coliform group in oxidation ponds
260			_aBangkok : _bAsian Institute of Technology, _c1983
300			_a77 leaves : _bill.
490	1		_aThesis ; _vno. EV-83-23
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1983
520			_aThree different types of coliform bacteria, E. coli., C. freundii and Kebsiella sp. were the major coliform group found in ArT oxidation ponds. These coliform bacteria were isolated from a sewage sample of the oxidation ponds, and the behaviour of each coliform bacteria was investigated. E. coli was the major coliform group in the influent of the oxidation ponds, while Klebsiella sp. was the most abundant group in the effluent of the oxidation ponds. More than 99.9% of C. freundii and about 99.9% of E. coli were removed, but 99.7% of Klebsiella sp.was eliminated in the oxi- dation ponds. And also, most of the coliform bacteria were eliminated in facultative pond, around 99.5% of total coliform bacteria. Based on the results of laboratory test, pH, temperature, light inten- sity and coliphage were the major factors affecting.the die-off process of coliform bacteria. Among species, Klebsiella sp. was the most resistant bacteria to the several environmental conditions. E. coli and C. freundii were more susceptible. Coliphage was also a significant parameter affecting the die-off process of coliform bacteria. An increased destruction of coliform bacteria was obtained especially in such conditions as high temperature, a little acidic pH range and high dosage of coliphage.
650	1	0	_aWater quality management _xNepal _xPhewa Lake
700	1		_aOmura, Tatsuo, _eChairperson
700	0		_aChongrak Polprasert, _eExamination Committee
700	1		_aVigneswaran, S., _eExamination Committee
710	2		_aCDG, Federal Republic of Germany, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-83-23
907			_a.b10109882 _bmnait _cx
902			_a231005
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