| 摘要 |
PURPOSE:To efficiently remove organic substance dissolved in water to be treated and to obtain ultra pure water free from organic substance by constituting a rear-stage filter group arranged to the outlet side of an organic substance oxidizing device of a pipeline, an apparatus, a separation membrane and parts which are made of inorganic material uneluting the dissolved organic substance. CONSTITUTION:After firstly removing residual chlorine, organic substance, ions such as alkali ion incorporated in city water 1 by the preceding-stage filters 2, 3, city water is fed to an organic substance oxidizing device 11 and the organic substance dissolved in filtrate is completely oxidized and decomposed by this oxidizing device 11 and removed. Then this water to be treated is fed to a recess-stage filter group and heavy metallic ions (e.g. iron) capable of being eluted by the oxidizing device 11 is removed by an inorganic ion exchange means 16 in this filter group. Furthermore inorganic particulate solid incorpo rated in this water to be treated is removed by an inorganic membrane filter means 17. By such a way, all impurities incorporated in city water 1 are re moved and ultrapure water 18 free from organic substance can be taken out. |
