2016 Fiscal Year Final Research Report
Innovative rapid processing for persistent wastewater using a gas-liquid plasma reactor
| Project/Area Number |
26249032
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
竹内 希 東京工業大学, 理工学研究科, 講師 (80467018)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIYAMA Hideya 東北大学, 流体科学研究所, 教授 (20156128)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | プラズマリアクタ / 難分解水溶性有機物 / 促進酸化 / 過酸化水素 / ピンホール放電 / 気液混相プラズマ |
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| Outline of Final Research Achievements |
High conductive produced water associated with crude oil production contains highly concentrated organic compounds. In this study, a plasma-based advanced oxidation system has been proposed, in which hydroxyl radial (OH) is generated in water by the hydrogen peroxide (H2O2) and ozone (O3) method. A diaphragm discharge in water produced H2O2 at high rate by using repetitive bipolar rectangular voltages. Ten diaphragm discharges in a solution with a conductivity over 30 mS/cm generated H2O2 at a rate of 2.7 g/h and an energy yield of 2.3 g/kWh. Energy efficiency of 1.6 gTOC/kWh in the decomposition of acetic acid was obtained by feeding micro bubble ozone-gas. The efficiency is higher than that of conventional advanced oxidation systems. The numerical simulation results showed that effective treatment of acetic acid can be achieved when the H2O2 supply rate is half of the O3 absorption rate as one H2O2 and two O3 molecules are necessary to produce two OH radicals.
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| Free Research Field |
高電圧プラズマ工学
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