Reuse of Textile ETP Sludge from Tirupur Region as Construction Material An Experimental Investigation
As per Tamil Nadu State Pollution Control Board (TNPCB) records, there are about 830 large units engaged in textile industrial processes in Tirupur alone. These industries have established eight Common Effluent Treatment Plants (CETPs) and many individual Effluent Treatment Plants (ETP), which are subjected to treat about 75,000 m3 of effluent per day genereated by textile industries. On the other hand, the sludge that retained due to the solids separation process in the treatment plants create lot of environmental problems due to lack of disposal methods. The practicing method of disposal of sludge in the Tirupur region is the Land filling method. Except engineered landfills, the rest of the sludge is disposed off by dumping it on the earth surface which may lead to ground water contamination and thereby results in socio-economic impacts. Many studies have been conducted in those areas and it needs for an alternative sludge management. The industrial solid waste of different nature is effectively utilized in Building materials as light weight cement.
Textile sludge has been collected from (CETP), Tirupur and studied its chemical, physical and engineering properties. The collected sludge was dried to reduce its moisture content and then sieved to remove the dusts present in that. The sieved sludge was then mixed with the concrete cubes and mortar cubes in 4%, 8% and 12%. The cast specimens were then cured for 7 days, 14 days and 28 days. The cured specimens were tested for its compressive strength. Then hollow blocks, pavement blocks and mortar bricks were cast and cured for 7, 14 and 28 days. The cured specimens were tested for its compressive strength. The strength of the specimens was compared with the reference specimens. The strength of the specimens was found to decrease with increase in the
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