Development of Rainwater Purification and Reclaimed Water Treatment Systems using a High-Efficiency Air-Cooled Ozone Generator

摘要

The objective of this study is to improve water quality resulting from rainwater purification treatment and to utilize reclaimed water purification system and high-class treatment purification system. This can be done by developing a purification treatment technique through resolution of discharged ozone problems by circulation-type of ozone treatment method with the use of a high-efficiency air-cooled cylindrical ozone generator. While the final removal rate of BOD showed the highest rate of 96% for 12 g without showing a great difference for the ozone injection amount of 9 g and 12 g, the final removal rate of COD upon treating for 12 minutes showed 73%, 66%, 93% and 96% for 3 g, 6 g, 9 g and 12 g, respectively, exhibiting similar treatment results to that of BOD. The removal of TSS and VSS due to ozone treatment was indicated not to have occurred. Also, upon passage of the magnetized water device, the removal rate of colon bacterium and general bacteria was shown to be about 35%, while a high removal rate exceeding 70% was indicated during the initial 3 minutes. Upon final treatment for 12 minutes, sterilization power above 99% was exhibited. Upon treatment using the magnetized water device and the OH-radical generator, not only dissolved suspended materials but also excellent sterilization power appeared to be identifiable.