CONTAMINATED SOIL TREATMENT APPARATUS

PROBLEM TO BE SOLVED: To prevent small particles including a radioactive material from mixing with reusable soil having large particles.SOLUTION: A contaminated soil treatment apparatus 1 for separating small particles PS including a contaminant from a contaminated soil CS comprises: a cleaning device 2 for cleaning the contaminated soil CS; a classifier 3 for separating a primary contaminated residual water CW1 including the small particles PS out of the soil particles and large particles PB larger than the small particles PS out of the soil particles from the contaminated soil CS; a solid-liquid separator 5 for separating the large particles PB exhausted from the classifier 3 and a secondary contaminated residual water CW2 associated with the large particles PB and including the small particles PS; and a particle removal device 4 for removing the small particles PS from the primary contaminated residual water CW1 exhausted from the classifier 3 and the secondary contaminated residual water CW2 exhausted from the solid-liquid separator 5. 【課題】大粒子である再利用土壌に、放射性物質を含む小粒子が混入することを防止する。【解決手段】汚染土壌ＣＳから汚染物質を含む小粒子ＰＳを分離する汚染土壌処理装置１であって、汚染土壌ＣＳを洗浄する洗浄装置２と、汚染土壌ＣＳを、土壌粒子のうち小粒子ＰＳを含む一次汚染残留水ＣＷ１と、土壌粒子のうちの小粒子ＰＳより大径の大粒子ＰＢとに分離させる分級装置３と、分級装置３から排出される大粒子ＰＢ、及び、大粒子ＰＢに付随するとともに小粒子ＰＳが含まれる二次汚染残留水ＣＷ２を分離させる固液分離装置５と、分級装置３から排出される一次汚染残留水ＣＷ１及び固液分離装置５から排出される二次汚染残留水ＣＷ２とから小粒子ＰＳを除去する粒子除去装置４と、を備える汚染土壌処理装置１。【選択図】図１