METHOD FOR TREATING RAW WATER CONTAINING HARDLY DECOMPOSABLESUBSTANCE

摘要

A method for treating a raw water containing a hardly decomposable substance , which comprises the following steps: a step (B) of adding an adsorbing agent to a raw water containing a hardly decomposable substance (a raw water to be treated) to allow said adsorbing agent to adsorb the hardly decomposable substance (an adsorption treatment step), a step (C) of separating a permeat ed liquid by the use of a filtration film, to concentrate the adsorbing agent having absorbed said hardly decomposable substance (a film filtration treatment step), and (D) a step of chemically decomposing the hardly decomposable substance being adsorbed in the concentrated adsorbing agent by a peroxide, without the operation for desorption from said adsorbing agent (a chemical decomposition step), and, by the above steps, concentrates hardly decomposable substances such as dioxins contained in a contaminated water (t he raw water to be treated) and converts the hardly decomposable substances to harmless substances. The above method can be applied also to a raw water containing a reducing substance such as a hydrogensulfite for neutralizing free chlorine, the application thereof is not limited by the properties of hardly decomposable substances being contained, and also it allows conversio n of hardly decomposable substances to harmless ones with good efficiency at a low cost.