CHARACTERIZATION AND SOLIDIFICATION/STABILIZATION OF TEXTILE CHEMICAL SLUDGE

Hema Patel, TERI University, New Delhi, India
Suneel Pandey, The Energy and Resources Institute, New Delhi, India

Textile chemical sludge is considered as hazardous waste as per the Indian Government Hazardous Waste Management rules. It is generated in voluminous amount in textile Combined Effluent Treatment Plants (CETPs) and due to restricted land area for its disposal, its safe management is a big issue. Considering the rapid industrialization and huge amount of industrial waste generated by the industries, the current trend is to explore the possibilities of recycle and reuse it. The present study is one such effort in this direction. In this study, the characterisation of textile sludge for various physicochemical parameters and major heavy metals i.e. Cu, Ni, Cd, Pb, Cr, Co, and Zn using standard procedures was performed. The characterisation indicated its alkaline nature with high electrical conductivity. The heavy metals such as Cu, Ni, Cr and Zn were found to be in high concentration, while Co, Cd and Pb were found to be on the lower side. Treatability studies using solidification/stabilization to examine its possibility for reuse were performed. Ordinary Portland Cement (OPC) and Portland Pozzolana Cement (PPC) containing fly ash were used as two binder systems. Sludge was used as a partial replacement of cement in different percentages ranging from 30 % up to 70 % along with the control containing no sludge for the comparison purpose. Standard blocks of 70.6 mm × 70.6 mm × 70.6 mm dimensions were prepared and were subjected to 14 days and 28 days curing. The blocks were evaluated for the physical properties such as unconfined compressive strength, hardening time and block density.

The values indicate that sludge up to 70 % has a potential to be used for construction application depending upon their requirements. Leachability and toxicity studies are in the process to evaluate its further efficacy for end use.

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Сведения об авторах

Hema Patel, Ph. D. Student, Centre for Regulatory and Policy Research, TERI University, Darbari Seth Block,
India Habitat Centre, Lodhi Road, New Delhi, 110003, India. Tel.: (11) 2468-21-00, 2468-21-11, fax: (11) 2468-
21-44, 2468-21-45. E-mail₁, e-mail₂

Последние изменения внесены 21.09.08