METHOD FOR REMOVING MANGANESE FROM WASTEWATER

摘要

Provided is a method for efficiently removing manganese from a manganese-containing wastewater while minimizing the use amount of chemicals including a neutralizer. The method for manganese removal according to the present invention is for removing manganese from a wastewater discharged from a wet smelting process in which an acid is added to nickel oxide ore and the mixture is subjected to pressure leaching to recover the nickel. The method comprises regulating the pH of the wastewater to 8.0-9.2, supplying the obtained liquid having the regulated pH to a drainage path in which a manganese-oxidizing bacterium is present and which has a length of 3 km or larger, and causing the liquid to pass therethrough over a period of one hour or longer.