Water Conservation Technology in Textiles: State of the Art

摘要

The monograph provides information on water, energy and chemical conservation in textile manufacturing, concentrating on wet processing of textiles. Dyehouses currently use several techniques to conserve water and reduce pollutants in effluents: one-bath dyeing, caustic recovery in mercerizing and sanforizing, reuse of dye liquor cool back water, recycling of wash water, and recovery of indigo dye. Dye wastewaters can also be renovated for reuse with ozonation, chlorination, or ultrafiltration. The most efficient utilization of foam finishing resin occurs at about 30% wet pickup. The WECON system uses a small heat pump to vaporize the waste stream and recover process water.