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008			011298s1998 th r 0000|0 eng d
035			_a.b11734127
099		9	_aAIT Thesis no.EV-98-27
100	0		_aAmporn Kankanlaung
245	1	0	_aAlgal metabolite oxidation by ozone and peroxone
260			_aBangkok : _bAsian Institute of Technology, _c1998
300			_a87 leaves
490	1		_aThesis ; _vno. EV-98-27
500			_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, 1998
520			_aThe presence of algal metabolite in surface water does not only create many problems on coagulation and flocculation processes but creates the health-related problem also since alga metabolite act as the trihalomethane precursors. Beside, it can produce taste and odor in drinking water. It is known that the trihalomethane precursor and producing taste and odor metabolite can not be removed completely by conventional drinking water process. Using advanced oxidation processes (AOP) to remove algal metabolite has become more popular since hydroxy radical which has very high oxidation potential can be created from the advanced oxidation processes. This research study the capacity of hydrogen peroxide, ozone, and combined ozone and hydrogen peroxide, peroxone, to mineralize the algal metabolite in surface water and investigates the pH, ozone dose, mass ratio of Hi02/03 for removal alga metabolite which is determined in term of removal of total organic carbon (TOC). The % molecular weight distribution (MWD) in oxidized alga metabolite is also analyzed. The result reveals that pH is the main parameter which affect to the TOC removal efficiency. For using Hi02, the optimum pH is 5-6. For ozonation, the optimum pH is 9. The best pH for the best oxidation capacity of peroxone is pH 7 and the optimum mass ratio of Hi02/03 is 0.4 mg Hi02/ mg. 0 3. For Hi02, it can remove TOC maximum only 15% within 10 min. when 1.44mg H20 2/ mg. TOC is used to treat AOM solution. Using 1.25 mg 0 3 I mg TOC can remove TOC 15% within 20 min. at optimum ·pH and using 1.8 mg 03 I mg. TOC can remove TOC up to 20% within 10 min and 30% within 20 min. Peroxone is the best for TOC removal. TOC can be removed 50%, 70%, 80%, and 90% within 5, 10, 20, and 30 min. subsequently at the optimum pH and treat with 0.72 mg. Hi0 2 (per mg. TOC) I 1.8 mg. 0 3 (per mg. TOC) (0.4mg. H20 2 I mg. 0 3) which is the optimum ratio.
650	1	0	_aWater _xPurification _xOzonization
700	1		_aVisvanathan, C., _eChairperson
700	0		_aSamorn Muttamara, _eExamination Committee
700	1		_aAnnachhatre, Ajit P., _eExamination Committee
710	2		_aMetropolitan Waterworks Authority, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-98-27
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B12747
907			_a.b11734127 _bmnait _cy
902			_a240407
998			_b0 _c981201 _dm _ea _fy _g0
945			_lmnait
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909			_aBarcode : 30050120714182 _bCREATED : 2014-03-20 _cRECORD # : i12775198 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160077847 _bCREATED : 2016-05-23 _cRECORD # : i12987918 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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