Saving Water And Energy In Bleaching Tubular Knits

The batch rinsing process developed by our company, called Bleachstar, has given excellent results in industrial practice, especially in the bleaching of tubular knit goods. As compared with optimized conventional processing, in Colorstar machines equipped with this system considerable amounts of water and heating energy are saved and the amount of waste water appreciably reduced. In this article the system is described in detail and the theoretical foundations of the process are explained. With the aid of the equations and graphs presented, various rinsing procedures can be compared with one another, savings can be quantified and machines as well as processes optimized. Based on the example of a onebath bleaching process it is shown that in comparison with conventional batchwise rinsing, up to 70% water/waste water can be saved as a result of reusing rinsing baths with this system. FV = Liquor Ratio