Pollution Research Paper

Vol 33, Issue 02, 2014; Page No.(295-302)

CO-PROCESSING OF TEXTILE DYEING INDUSTRY ETP SLUDGE IN CEMENT INDUSTRY – A CASE STUDY

R. RAJAMANICKAM AND S. NAGAN

Abstract

Cement production consumes large amounts of both raw materials and fuel and produces substantial CO2 emissions. The use of alternative fuels and raw materials in cement manufacturing can reduce the amount of fossil fuels and virgin raw materials needed, and thus reduce the overall environmental impact of the operations. These alternative materials may be either by-products from other industrial processes, or waste streams such as municipal solid waste, sewage sludge, ETP sludge, discarded tyres and plastics. In the State of Tamil Nadu in India, large number of textile dyeing units are in operation in Tiruppur, Erode, Namakkal and Karur districts. These units generate huge quantity of sludge from the treatment of trade effluent, which is categorized as hazardous waste needs to be disposed properly. M/s. Ultra Tech Cement Limited, Reddipalayam, Ariyalur District carried out a trial run of co-processing of textile dyeing industry ETP sludge in their cement plant. The trial study reveals that there is no significant variation in the quality of stack emission, ambient air quality, clinker composition, and the physical strength of cement. There is no leaching of heavy metals from the clinker. This also conserves the raw material (lime stone) consumption. Thus co-processing of textile dyeing industry ETP sludge in the cement industry is a sustainable development concept based on the principles of making one industryÂ’s waste anotherÂ’s raw material.

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