Abstract
Pulsed discharge in water with bubbles is proposed for water treatment including the persistent substance. The persistent substance (chiefly organic substance) is difficult to decompose by natural phenomenon. The humic acid that is a target in this study is one of the persistent substances. A Blumlein type pulse forming network (B-PFN) is provided in the present work. The discharge reactor is a glass cylinder with injection needle - spiral electrodes system. Helium, oxygen and nitrogen are used for the bubbling gas. The process time by pulsed discharge in the nitrogen bubble is shorter than the time by pulsed discharge time in helium, oxygen bubbles. The organic carbon concentration in the humate solution has decreased by the pulsed discharge in the nitrogen bubble. The factor of decomposition of the humate solution is compared with ozone and ultraviolet irradiation.
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