Environmental Friendliness: Zero Effluent Spun Yarn Slashing

f you were asked to name the most I environmentally troublesome process in the greige plant, what would you say? For most operations, the answer should be the slasher, or more specifically the various liquid wastes that come ohe biological and chemical oxygen demands inherent with the starch and ?olyvinyl alcohol film formers that are so commonly used today. Dumping any size, or even simple cleaning of the slashing area can release more than mough starch and PVA to cause a disLharge permit violation in the typical -11ant. Survey of Plant Practices Approximately five years ago, the Institute of Textile Technology (ITT) and its members surveyed a number of plants to determine just how much wastewater is generated by the typical sizing operation. The survey also noted any practices that were different between mills. The central findings were: Most plants occasionally dump concentrated batches of cooked size,