Method for treating a variety of wastewater streams

A method of treating wastewater for the removal of metals from the wastewater, the method comprising steps of:

• adding the wastewater and Ferrous Sulfate (FeSO4) to a metal precipitation unit and stirring to create a metal sulfate slurry;
• transferring the metal sulfate slurry to a first separation unit and subjecting the metal sulfate slurry to a first solid-liquid separation process to create a first treated wastewater and a filtered sludge;
• transferring the first treated wastewater to a Catalytic Oxidation reactor unit;
• adding Dried Basic Oxygen Furnace (BOF) slag, Hydroxides, hydrogen peroxide (H2O2) to the Catalytic Oxidation reactor unit and stirring to create a catalytic metal slurry;
• transferring the catalytic metal slurry to a second separation unit and subjecting the catalytic metal slurry to a solid-liquid separation process to create a second treated wastewater and a catalytic metal sludge,
• transferring the second treated wastewater to a sulfates precipitation unit;
• adding Barium Carbonate (BaCO3) to the sulfates precipitation unit and stirring to create a barium sulfate slurry;
• transferring the barium sulfate slurry to a third separation unit and subjecting the barium sulfate slurry to the solid-liquid separation process to create a third treated wastewater and a filtered sludge,
• wherein the third treated wastewater contains less metals than the wastewater and is reusable for an industrial operation.