METHOD FOR TREATING WATER FOR CIVIL ENGINEERING WORKS

摘要

PROBLEM TO BE SOLVED: To provide a method for treating water for civil engineering works and obtaining extracted water from raw water such as river water without necessitating disposal of a raw water contaminant. SOLUTION: Raw water is pumped up by a submerged pump 1 arranged in a water supply source of a river, and its contaminant is separated to extract treatment water for civil engineering works. A solid-liquid separator 2 separating a solid from a liquid is provided on a discharge side of the submerged pump 1, and a drain port 3 for draining solids separated by the solid-liquid separator 2 is opened in the raw water to extract the treatment water.