Kinetic Study and Optimum Control of the Ozone/UV Process Measuring Hydrogen Peroxide Formed In-situ

摘要

This study was conducted to develop a kinetic model of the ozone/UV process by monitoring the trend of in-situ hydrogen peroxide formation.A specifically devised setup,which could continuously measure the concentration of hydrogen peroxide as low as 10 mug/L,was used.The kinetic equations,comprised of several intrinsic constants with semi-empirical parameters(k_(chain)and k_(R3))were developed to predict the time varied residual ozone and hydrogen peroxide formed in situ along with the hydroxyl radical concentration at steady state,[OH deg]_(ss),in the ozone/UV process.The optimum ozone dose was also investigated at a fixed UV dose using the removal rate of UV absorbance at 254 nm(A_(254))in raw drinking water.The result showed that the continuous monitoring of hydrogen peroxide formed in situ in an ozone/ UV process could be used as an important tool to optimize the operation of the process.