Order Received for CHMILES Pilot Plant for Removal of Heavy Metals from Pit Water in Abandoned Open-pit Quarry

NAGAOKA announces that it received an order for CHEMILES pilot plant from Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency (hereinafter referred to as JAEA) on August 9th, 2016 and successfully started a test on September 9th, 2016,

1. Overview of the Pilot Test
JAEA has been operating pit water treatment to remove harmful substances such as radium, iron, manganese and arsenic. To create more efficient treatment methods, JAEA conducts this pilot test for treatment of pit water in abandoned open-pit quarry which generally contains high concentration of harmful substances such as dissolved iron by utilizing our CHEMILES(※).

CHEMILES, groundwater treatment system which minimizes injection of chemicals in the treatment process and produces little by-product, was installed in the yard of JAEA and has been continuously operated. Through the pilot test, the removal function for iron, manganese and arsenic as well as radium which has never been proven the removal without chemical injection will be verified.

(※)CHEMILES is a groundwater treatment system which removes harmful substances in groundwater, such as iron, manganese and ammonia nitrogen, by contact oxidation and biological treatment at extremely high speed.

2. Terms of the Pilot Test
September 2016 to March 2017