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035			_a.b1168673x
099		9	_aAIT Thesis no. EV-97-03
100	0		_aAnchalee Natikool
245	1	0	_aTreatment of domestic wastewater with chemical precipitation
260			_aBangkok : _bAsian Institute of Technology, _c1997
300			_a71 leaves
490	1		_aThesis ; _vno. EV-97-03
520			_aA thesis 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, 1997
520			_aThis study investigates the feasibility for the operation of domestic wastewater treatment by chemical precipitation. In this study AIT wastewater was employed as a domestic wastewater being treated. Three coagulants which are ferric chloride, polyaluminium chloride and ferric sulfate were employed as a coagulants. Jar test which was used to determine the optimum coagulant dosage and pH results that the most appropriate coagulant, among above three coagulants, for applying with AIT wastewater treatment is fenic chloride. The optimum dosage and pH of ferric chloride are 400 mg/l and 8.0 respectively. By applying ferric chloride as a coagulant for AIT wastewater treatment through a chemical precipitation, it is found that the effluent concentration are met requirement of the DEG. The effluent concentration and the removal efficiency for removal of BOD, TSS, TDS, Org-N and TP, which are 16 mg/l, 4 mg/l, 15 mg/l, 4 mg/l, and 0.4 mg/l respectively, and 70%, 89%, 32%, 33% and 80% respectively, can be achieved through chemical treatment system. From comparison between chemical treatment process and biological treatment process, it is interesting to indicate that the chemical treatment process has more advantages over the biological treatment process. As above it can be indicated that chemical wastewater treatment is an acceptable method for domestic wastewater treatment, and can replace the conventional biological treatment system.
650	1	0	_aSewage _xPurification _xPrecipitation
700	0		_aSamorn Muttamara, _eChairperson
700	0		_aChongrak Polprasert, _eExamination Committee
700	1		_aHa, Sung Ryong, _eExamination Committee
710	2		_aElectricity Generating Authority of Thailand, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-97-03
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B14290
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