Development of Evaluation of Natural Organic Matter (NOM) related to Advanced Oxidation Treatment

In this study, photocatalytic reaction was investigated as an advanced oxidation water treatment. Titanium dioxide was coated on a glass and used as a catalyst. Low pressure mercury lamp and black light lamp, which has similar wavelength to sun light, were used as light sources. The decomposition rate of phenol and methylene blue under various condition was determined. The role of flow condition, light intensity and specific catalyst area was quantitatively evaluated. The reaction rate followed Langmure-Hinshelwood equation, and the factors above was correlated to the parameters in the equation. Different types ofTiO2 was also tested, and the role of pH was estimated and explained from the surface charge of catalyst. GC/MS was applied to the evaluation of Natural Organic Matter (NOM). Bacterial Regrowth potential was developed as a evaluation method of NOM. Flowsitemetry was applied to counting the bacteria, and sonication was essential as pretreatment.