碩士 / 弘光科技大學 / 環境工程研究所 / 105 / In the process of water treatment, ozone oxidation (O3) due to the high oxidation efficiency and disinfection capacity is better than chlorine disinfection, but ozone disinfection in the original water containing bromine ion conditions is also easy to produce another disinfection by-product - bromate (BrO3 -), while the use of ozone may increase the cost of other water purification operations, ozone in the water solubility of low shortcomings, so ozone can not operate in high concentrations of ozone conditions, if the water contains more difficult to break down organic matter to the current water plant Ozone dose and contact time may not be reduced to the target concentration. In this study, the use of continuous flow ozone reaction tank / catalytic reactor equipment, in the ozone reaction system to add titanium dioxide (TiO2) catalyst, thereby increasing the ozone in the low dose reaction, both to increase the free radical production rate, improve the ability of oxidizing pollutants. In addition, the beneficial algae in the common algae in the metabolism of organic matter and the resulting odor, is the current water treatment procedures encountered troubled reasons, the use of artificial water preparation and the actual use of eutrophic lake water for algae and other metabolites Ozone oxidation test, the experimental object is artificial cultivation of algae (microcystis (Microcystis), Chlorella (Chlorella)) and from the scene of the lake with mixed algae species of water samples.The results showed that the decomposition rate and efficiency of organic carbon in algae were significantly higher than those of ozone alone under the catalytic conditions of TiO2. Under the control of the water quality and operating conditions, the average increase was about 10 ~ 15% the decomposition rate of organic carbon in algae. In addition, for the fluorescence cytometry analysis of ozone and catalytic ozone before and after algal cell survival results, found that catalytic ozone in low-dose ozone can reach nearly 98% algae removal efficiency. Furthermore, the results of high performance molecular sieves-organic carbon detectors (HPSEC-OCD) and in-series UV photodetection (UVD) show that the molecular weight distribution of organic matter in the algae solution before and after the catalytic ozone Macromolecules organic matter by ozone or free radical oxidation after the formation of small molecules.In this study, it was found that the photocatalytic activity of TiO2 photocatalyst was enhanced by Oxygenated cells in O3 and was significantly efficient at low O3 dose, and its ozone consumption did not produce more free radicals And significantly increased.
| Identifer | oai:union.ndltd.org:TW/105HKU00515013 |
| Date | January 2017 |
| Creators | LIU,CHUN-WEI, 劉俊煒 |
| Contributors | HUANG,WINN-JUNG, 黃文鑑 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 109 |
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