Environment and Effluent from Sizing Operations
topic
Sizing operation effluent from size box drain, wash water, and desizing liquor contains starch, PVA, and synthetic size compounds with high biological oxygen demand of 1000 to 5000 mg per litre from starch and 50000 to 100000 mg per litre from PVA that must be treated before discharge, with size recovery from overflow using ultrafiltration membranes and size reuse programmes reducing both effluent BOD load and raw material cost through recovery of reusable size from dilute solutions.
Role
Manages the significant environmental burden of sizing operations whose effluent load represents one of the highest BOD contributions in the textile wet processing chain, with effluent treatment cost and regulatory compliance driving the adoption of low-BOD synthetic sizes, size recovery systems, and water-efficient sizing processes that reduce the environmental cost of the essential sizing operation while maintaining the warp preparation quality required for efficient weaving.