Sales, Candelaria L. creator Samorn Muttamara Chairperson Mora, J. C. Examination committee Reutergardh, L. Examination committee Boonthanon, S. Examination committee Canadian International development Agency (CJDA) Scholarship donor text series technical report th Bangkok Asian Institute of Technology 1992 continuing eng 87 p. In this study, laboratory scale experiments were canied out to investigate the bactericidal effectiveness of ozone-hydrogen peroxide (Peroxone) process and to find out the extent of its oxidation as well. It included the evaluation of the efficiency of the ozonizer used (Model E0- 302) and the investigation of the effects of ozone and Peroxone on trihalomethane (THM) formation. Filtered unchlodnated water from Bangkhen Water Treatment Plant was used as source water. The appHcation of ozone generated at various conditions: low voltage-high flowrate and high voltage-low fowrate with dilution showed different reactivity. Ozone obtained at low voltage high flowrate produced higher ozone residuals and was more effective Jn E. coli inactivation and total organic content removal (TOC). The investigation revealed that the combined process (Peroxone) is more active bactericidal agent compared to that of ozone alone and chlorine. Nearly 99.99 percent km was attained at 0.34 mg/liter of ozone and Hp2 ;o1 ratio of 0.5. It may be less expensive than ozonation because lower ozone dosages are required tci achieve the same level of contaminant oxidation. The addition of H1?2 was found to have increased the ozone residuals. Peroxone application also can increase the THNI removal by ozone to 20- 30 percent. Thus, addition of OH· radicals through H2 o 2 can increase the oxidizing capacity of ozone in the removal of organic materials in the natural water. In contrast, glucose as source of organic matter is not susceptible to the H2 o2 addition. Therefore, findings further showed that Peroxone, aside from its effectiveness in bactericidal inactivation, can also be a good agent for the control of THM formation through maximizing TOC removal. A thesis submitted in partial fulfillment of the requirement for the degree of Master of science Thesis (M.Sc.) - Asian Institute of Technology, 1992 Water treatment plants Sewage Purification Organization Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B16846 http://203.159.5.9/ait-thesis/detail.php?q=B16846 170399 20260818144342.0