Pilot-Scale Test on Ozone Pre-Oxidation for Enhanced Coagulation Treatment of the Micro-Polluted Reservoir Water

Abstract

Pilot scale tests are conducted to study the pre-ozonation effect of the micro-polluted surface water and its influence on the operation and treatment effects of the follow-up filtration units. The results showed that significant improvement of sand filtration performance was achieved through the use of ozone pretreatment, and the filtration cycle was nearly doubled. The THMFP removal rates of the pre-ozonation technology and the conventional technology are respectively 32% and 18%, and the former one has reduced obviously the particle number of sand filtration effluents which implied the reduced probability of detection rates of effluent microorganisms and pathogens. Long-term run effect showed that the pre-ozonation process was superior to conventional processes in CODMn and turbidity removal.

Study on Chemical Pre-Oxidation Enhanced Coagulation for Micro-Polluted Raw Water Treatment

“…Among them, chemical pre-oxidation is very attractive for its strong capabilities in the oxidation and decomposition of organic matters as well as its operational feasibility and cost effectiveness. The combination of chemical pre-oxidation with coagulation has its prospective application in the update of the existing drinking water process [1][2][3].…”