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Direct Reusing of Textile Wastewater in Scouring-Bleaching of Cotton Goods Devoid of Any Treatment

By Abu Shaid, Md. Showkat Osman, Md. Abdul Hannan and M. A. Rahman Bhuiyan


Abstract:- Reusing of textile wastewater is generally based on some sorts of wastewater treatment process before reusing. Current paper discusses the direct reusing of textile wastewater without any treatment which not only can reduce the freshwater consumption rate but also reduce the effluent load. Six different types of rinsing wastewaters were studied. Wastewaters were segregated by collecting them separately from the drain line of dyeing machine. Then collected wastewaters were used for the scouring bleaching of knitted cotton fabric. Few specific types of rinsing water have showed bright prospect of reusing. Among them, one type of ‗before dyeing rinsing ‘ water has found to be quite acceptable and safe to reuse for the scouring-bleaching of cotton goods. Bleached samples were then dyed to investigate the dyeing performance. Weight loss of scoured-bleached sample has found 6.65 % for wastewater and 6.53 % for fresh water. Reflectance of whiteness of bleached wastewater and fresh water samples have found 76.68% and 77.92 % respectively whereas the shade variation between them was only 0.62 (∆E value) which is quite acceptable. Absorbency of bleached samples have also found excellent. After dyeing, the variation of shade between fresh water and wastewater treated samples have found 0.65 (∆E value) which is also well below the maximum acceptable limit. Beside this, Fastness rating of wastewater treated samples were 4/5, 4 and 4/5 for rubbing, washing and perspiration fastness respectably. Key words:- Effluent, Wastewater reuse, Groundwater, Environment, I

Year: 2014
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