Vol. 51 No. 3 (2014)   Machinery, Equipment & Infrastructure
New Products

Application of Electrolytic Denitrification System to Treatment of Waste Water from Power Plants

Mitsubishi Heavy Industries
Environmental & Chemical Engineering Co., LTD.
Waste Resource Recycling Plant Division
Liquid Waste Process & Electrolysis Technology Department

Hydrazine has been used at thermal power plants as a water treatment agent. There is a trend, however, toward banning the use of hydrazine mainly in Europe. As an alternative option, the adoption of "high-pH treatment (high-AVT)" is suggested. The use of high-AVT results in an increase in ammoniacal nitrogen levels in waste water from power plants. As the discharge of nitrogen is regulated in many countries, appropriate measures should be taken. This report introduces an electrolytic denitrification system that is useful for abiding by the regulations on nitrogen discharge and is a proprietary technology of Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd.