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.
