Ozone treatment and high-voltage pulsed discharge treatment have been performed to purify waste water at several places of sedimentation tanks in Sasebo city. Experimental results suggest that ozone treatment is effective for decreasing the number of colon bacillus and the bacteria count; however, ozone treatment is not very effective for decreasing chemical oxygen demand (COD). Pulsed discharge treatment is not very effective for decreasing both bacteria count and COD. On the other hand, ozone treatment together with pulsed discharge treatment is effective for decreasing not only bacteria count, but also COD. This may be due to the effect of hydroxyl radicals that have stronger oxidizing and bleaching effects than ozone. These results suggest that advanced oxidation processes can be applied effectively to ozone treatment together with pulsed discharge treatment.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry