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

1.针对原子氧、臭氧、OH自由基等对水的净化作用，提出了利用气泡内放电的方法。使用这些放电在水中测量产生的臭氧，并且获得3000 ppm（氧气：0.5l/min）的最大臭氧浓度。OH自由基的产生也证实了使用光谱测量技术.为了实现原子氧、臭氧、OH自由基等的高效利用，实现水的净化，提出了利用气泡内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。通过光谱技术检测通过施加电压在电极之间发生的放电和形成的OH自由基。通过端接50Ω电阻的信号电缆获得放电灯启动时间。氦（335.6nm）和OH（309 nm，A^2 <$X → X^2 II）的发射起始时间同时出现。因此，认为OH自由基与气泡内的放电同时产生。此外，放电起始电压为20 kV，随着放电电压和气体流量的增加，放电能量增加，气泡数量增加，OH自由基生成量增加。一部分能量以放电发光的形式出现。

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.