博士 / 國立中興大學 / 環境工程學系所 / 102 / Owing to its higher efficiency and better control of disinfection by-products compared with chlorine (Cl2), chlorine dioxide (ClO2) have been widely applied as disinfectant in public water system, cooling system control and wastewater treatment in the past decades. ClO2 of high purity and high concentration can be electrochemically produced when using anolyte composed of specific chemical compounds. Compared with the traditional process, electrochemical process has the advantages of simple dosing, ease of operation and continuous production onsite. In this study, different parameters of membrane electrolysis are varied to determine the appropriate conditions for ClO2 generation. Moreover, the feasibility on the improvement of aquaculture water by chlorine dioxide are also examined.
Experimental results show that the batch membrane electrolysis, conducted at operation voltage of 12 V using anolyte composed of 2 % NaCl and 6 % NaClO2 with initial temperature of 30 ℃ and NaOH catholyte of 0.5 % concentration, can yield ClO2 of 906.5 mg/L concentration and 98.4 % purity. Moreover, the subsequent electrolysis was conducted at operation current of 70 A and anolyte feed rate of 120 ml/min, the concentration and the purity of ClO2 were continuously over 600 mg/L and 98 % after 30 min operation, respectively. The mixture that was composed of chlorine and chlorine dioxide had the better efficiency than pure chlorine dioxide on the removal of ammonia nitrogen and nitrite. The loss of mass balance, dividing ammonium, nitrite and nitrate, is also found to be positively correlated with additional rate of chlorine.
| Identifer | oai:union.ndltd.org:TW/102NCHU5087001 |
| Date | January 2013 |
| Creators | Yi-Tze Tsai, 蔡翼澤 |
| Contributors | Yung-Hsu Hsieh, 謝永旭 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 136 |
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