World Journal of
Pharmaceutical and Life Sciences

STABILIZATION OF HEAVY METALS FROM ETP SLUDGE THROUGH PORTLAND CEMENT AND LIME

Muneswara Rao K.*, Swamy AVVS, Varaprasad D., Mohammed Afzal and Venkata Raju V.

ABSTRACT

The potential of stabilization technology for the safe disposal of hazardous wastes has wide spread recognition. This study aimed to evaluate the efficiency of portland cement and lime based stabilization technology for the secure disposal of hazardous waste containing toxic metals and pH. Stabilized sludge is a beneficial material that contains 1% portland cement and 2% lime, resulting in a durable substance. Before stabilization, ETP-A, ETP-B, ETP-C, and ETP-D exceeded the CPCB direct landfill limits for Zinc (Zn) in ETP-A, Lead (Pb) in ETP-B and ETP-D, and Hexavalent Chromium Cr+6 in ETP-C. The outcome decreases the levels of zinc, lead, and chromium hexavalent in the stabilized sludge. Enhancing the mixture with varying amounts of 2% lime and 1% portland cement will establish a highly alkaline environment and enhance the binding capacity. This study aims to minimize the cost of stabilizing wastewater treatment sludge by employing portland cement, and to ensure the safe disposal of the sludge. The resultant material effectively controlled the heavy metal concentration and the leachability capability.

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