Demonstration test on decontamination of contaminated pool water using liquidsolid settling technology with flocculants

For the purpose of supplying agricultural water, a stationary purification system for contaminated water had been developed on the basis of the liquidsolid settling technology using flocculants. Two kinds of flocculants had been developed on the basis of preliminary tests: one that compounds iron ferrocyanide and the other that does not. With the use of this system and flocculants, a demonstration test was conducted to apply the decontamination technology on contaminated water in two swimming pools in an elementary school located at Motomiya City, Fukushima Prefecture, Japan. It is proved from the results that both the developed purification system and the flocculants can be established as a practicable decontamination technology for contaminated water: the treatment rate was 10m3/hour and the elimination factor of radioactive materials was higher than 99%.