Effect of coagulation and ozonation on biopolymers in highly utilized drinking water source

Abstract

 The effect of coagulation and ozonation on biopolymers (high-molecular-weight organic matter derived from living organisms) in drinking water source was investigated through experiments using the following two configuration modes with varied locations for both the treatment processes: Coagulation – Ozonation – Membrane filtration, &, Ozonation – Coagulation – Membrane filtration. For this purpose, the well-used Yodogawa river water was utilized in this study as the raw water for treatment. The obtained results showed, by placing coagulation before ozonation, the concentration of biopolymers could be effectively reduced; and meanwhile, the increasing extent in the concentration of biopolymers caused by followed ozonation treatment could be alleviated. Taking into also consideration the effect of pre-coagulation on lowering ozone doses needed, we could suggest that the configuration mode of Coagulation – Ozonation – Membrane filtration is comparatively more effective than that of Ozonation – Coagulation – Membrane filtration for reduction of biopolymers in the water after treatment.