An experimental study on water reuse in textile pretreatments especially in scouring and bleaching

Water is expensive to buy, treat, and dispose. Water conservation and reuse are rapidly becoming a necessity for textile industry. Water conservation and reuse can have tremendous benefits through decreased costs of purchased water and reduces costs for treatment of wastewaters. Prevention of discharge violations as a result of overload systems can be a significant inducement for water conservation and reuse. By implementing water conservation and reuse programs, the decision to expand the treatment facilities can be placed on hold, and the available funds can then be used for expansion or improvements to process equipment.Textile industries are consuming large quantity of water. Major portion of water is used for wet processing of textile (60 to 70 %). Keeping this in mind there is acute need of water conservation programmed to implement in textile wet processing. Water conservation in textile wet processing achieved through countercurrent washing, machine modification, process modification, good housekeeping and reusing and recycling. Reuse of same scouring and bleaching bath in textile wet processing helps for water conservation. Here analysis has been carried out for repeating the bath in Cotton pre-treatment operations. Pre-treatment operations considered are scouring and bleaching processes.