Sludge treatment by electrical discharges generated inside bubbles in water for production of high quality water

利用水中气泡内产生的放电处理污泥，生产优质水

• 批准号: 10555093
• 负责人: YAMABE Chobei
• 金额: $ 6.59万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555093/
• 关键词: Discharge in bubbled water; water treatment; ozone; ozonizer; OH radical; atomic oxygen; 水質; パルスパワー; 活性種; 溶存オゾン; 汚泥処理; 水中気泡放電

1. For the efficient of atomic oxygen, ozone and OH radicals, etc, for water purification, the discharges inside the bubbles produced in water were proposed. The generated ozone was measured using these discharges in water and maximum ozone concentration of 3000 ppm (oxygen : 0.5 l/min) was obtained. The generation of OH radicals was also confirmed using the spectroscopic measurement technique.2. In order to accomplish the efficient utilization of atomic oxygen, ozone, OH radicals, etc. for water purification, we proposed a new type of discharge method that uses the discharge inside the bubbles. The repetitive pulsed power generator was used as power supply. The discharge occurred between the electrodes by applying the voltage and formed OH radical was detected by the spectroscopic technique. The discharge light start-time was obtained by a signal cable terminated with 50Ω resistor. This start-time of both emissions, helium (335.6nm) and OH (309nm, A^2Σ→X^2II), appeared at the same time. Therefore, it was thought that the OH radicals were generated same time as discharge inside the bubbles. In addition, the applied voltage to initiate discharge light was 20kV.OH radicalformation enhanced with the applied voltage and the gas flow rate, since the discharge energy and a number of bubbles increased. A part of the energy appeared as the discharge light emission.

1.针对原子氧、臭氧、羟基等自由基对水的净化效率，提出了水中产生的气泡内放电的概念。利用这些放电在水中测量产生的臭氧，得到最大臭氧浓度为3000ppm(氧气：0.5 L/分钟)。利用光谱测量技术也证实了羟基自由基的产生。为了实现原子氧、臭氧、OH等自由基在净水中的高效利用，我们提出了一种利用气泡内部放电的新型放电方法。采用重复频率脉冲功率发生器作为电源。通过施加电压，电极之间发生放电，并通过光谱技术检测到生成的OH自由基。放电光起始时间由端接50Ω电阻的信号电缆获得。氦(335.6 nm)和氢(309 nm，A^2Σ→X^2ii)两个发射的开始时间同时出现。因此，认为OH自由基的产生与气泡内的放电是同时发生的。此外，由于放电能量和气泡数目的增加，引发放电光的外加电压为20kV。随着外加电压和气体流量的增加，·OH自由基的形成增强。一部分能量以放电发光的形式出现。

项目成果

C.Tomasz,Y.Chobei 他: "Ozone generation using Plate rotating electrode Ozonizer-Effect of electrode rotation and discharge analysis method-"Ozone Science and Engineering. VOL.22 NO.6. 563-574 (2000)

C. Tomasz, Y. Chobei 等人：“使用平板旋转电极臭氧发生器产生臭氧-电极旋转效应和放电分析方法-”臭氧科学与工程VOL.22 NO.6 (2000)。

C.Yamabe,S.Ihara 他: "Ozone generation by discharge inside the bubbles in water"Proc.international Symposium on High pressure, Low temperature plasma Chemistry. 153-157 (1998)

C. Yamabe、S. Ihara 等人：“通过水中气泡内的放电产生臭氧”，Proc. 国际高压、低温等离子体化学研讨会 153-157 (1998)。

T.Miichi, S.Ihara, S.Satoh and C.Yamabe: "Spectroscopic Measurements of Discharge inside Bubbles in Water"Proc.of ADVANCES IN APPLIED PLASMA SCIENCE. Vol.2. 291-296 (1999)

T.Miichi、S.Ihara、S.Satoh 和 C.Yamabe：“水中气泡内放电的光谱测量”应用等离子体科学进展论文集。

Yoshihiro Mori, Chobei Yamabe, Kazunori Hakiai, Yoshiaki Haga: "Characteristics of Ozone Generation Using Combined Discharge Method"Applied Plasma Science. Vol.8. 88-94 (2000)

Yoshihiro Mori、Chobei Yamabe、Kazunori Hakiai、Yoshiaki Haga：“使用组合放电法产生臭氧的特性”应用等离子体科学。

Tomoaki Miichi, Nobuya Hayashi, Satoshi Ihara, Saburoh Satoh, Chobei Yamabe: "Ozone generation by discharge inside the bubbles in water"T.IEE Japan. Vol.121-A, No.5(in press). (2001)

Tomoaki Miichi、Nobuya Hayashi、Satoshi Ihara、Saburoh Satoh、Chobei Yamabe：“通过水中气泡内的放电产生臭氧”T.IEE Japan。