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Increased efficiency for setting insulation grids for water treatment by pulsed power discharge in air spraying water droplets

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4 Author(s)
Sugai, T. ; Yamagata Univ., Yamagata, Japan ; Abe, T. ; Kamiyama, R. ; Minamitani, Y.

Recently, water treatment using pulsed streamer discharge in water is studied, because the pulsed streamer discharge generates active species that decompose organic compounds in water. We have studied the method spraying water droplets into discharge space as one of the water treatment methods. In this paper, improvement of a treatment rate by changing structure of reactor has been investigated. At first, the influence by changing an electrode and packing pellets was investigated. The indigo carmine solution was decomposed as sample water. As the result, the treatment efficiency for the discharge energy was decreased by using the reactor of longer electrode and using the reactor with the pellets. The reason of the decrease of the treatment efficiency is that water droplets become water film and that the voltage falls due to the increase of capacitance components of the electrode. To solve these problems, the reactor setting the insulation grids was investigated. This reactor improved the treatment efficiency because setting the insulation grids prevented the fall of energy efficiency by the long electrode and quickened the decomposition of the organic compounds.

Published in:

Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:19 ,  Issue: 6 )

Date of Publication:

December 2012

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