SULFIDE ION-SELECTIVE ELECTRODES FOR CONTROL OF CHEMICAL FEED OF ORGANIC SULFIDE PRODUCTS FOR METAL ION PRECIPITATION FROM WASTE WATER

摘要

A wastewater treatment system and method for chemical precipitation and removal of metals from wastewater in a continuous or batch treatment process includes an ion-selective sulfide electrode and a reference electrode disposed in a precipitation tank for measuring an electrochemical potential therebetween in a predetermined range. A controller unit is provided which is responsive to the electrochemical potential in the predetermined range and is connected to a precipitant feed unit for automatically controlling the chemical precipitant fed into the precipitation tank.