In general, industrial wastewaters contain suspended, colloidal and dissolved (mineral and organic) solids. In addition, they are either excessively acidic or alkaline in nature and they may contain high or low concentrations of chromophoretic compounds. These wastes may contain inert, organic or toxic materials and possibly pathogenic bacteria. These wastes may be discharged into the sewer system provided they have no adverse effect on treatment efficiency or undesirable effects on the sewer system. It may be necessary to pre-treat the wastes prior to release to the municipal system or it is necessary to a fully treatment when the wastes will be discharged directly to surface or ground waters. Industrial wastewaters are effluents that result from human activities which are associated with raw-material processing and manufacturing. Pilot plant studies were conducted to determine the sulphates removal efficiency in pharmaceutical wastewater using Chemo autotrophic activated carbon oxidation technology and were observed to give satisfactory results.