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Water Savings and Reuse in the Textile Industry
Abstract Water savings, reclamation and reuse in industry are topics of increasing economic interest due to increasing water scarcity and costs. For this reason, research and development activities within this topic is increasing, methods and tools for analyzing water savings and reuse possibilities are being developed, and solutions are being implemented. This paper presents experience and results of water savings and reuse in industry exemplified by the textile industry. Textile processing is one of the largest and oldest industries worldwide and responsible for substantial resource consumption and pollution. The wet processing part of the industry, i.e. pre-treatment, dyeing, printing and finishing, is especially polluting and resource consuming in terms of water, energy and chemicals. It entails a vast variety of water consuming processes, and like in most industries, freshwater is used in all processes with almost no exceptions. It was known for many years that fresh water is not needed by all processes taking place in textile wet treatment. However conservatism and consideration for product quality in the industry have until recently prevented substantial water reuse from breaking through in practice. A four year research program on industrial water reuse, however, recently resulted in a break-through of water reuse in the Danish textile industry: one polyester dyehouse has since 2001 successfully implemented direct water recycling, saving more than 40% of water required. Process Integration and water pinch techniques were used to identify the potentials and, combined with the company’s process insight, used to achieve the best system design for the reuse of water, energy and chemicals. Separation techniques like membrane filtration have been applied successfully to the process water used in wet processing in both cotton and polyester dyeing. Pilot scale demonstration plants have documented the technical feasibility of water reclamation by this technique, with payback periods of 1–3 years. This payback has, however, so far prevented full-scale implementation.
Water Savings and Reuse in the Textile Industry
Abstract Water savings, reclamation and reuse in industry are topics of increasing economic interest due to increasing water scarcity and costs. For this reason, research and development activities within this topic is increasing, methods and tools for analyzing water savings and reuse possibilities are being developed, and solutions are being implemented. This paper presents experience and results of water savings and reuse in industry exemplified by the textile industry. Textile processing is one of the largest and oldest industries worldwide and responsible for substantial resource consumption and pollution. The wet processing part of the industry, i.e. pre-treatment, dyeing, printing and finishing, is especially polluting and resource consuming in terms of water, energy and chemicals. It entails a vast variety of water consuming processes, and like in most industries, freshwater is used in all processes with almost no exceptions. It was known for many years that fresh water is not needed by all processes taking place in textile wet treatment. However conservatism and consideration for product quality in the industry have until recently prevented substantial water reuse from breaking through in practice. A four year research program on industrial water reuse, however, recently resulted in a break-through of water reuse in the Danish textile industry: one polyester dyehouse has since 2001 successfully implemented direct water recycling, saving more than 40% of water required. Process Integration and water pinch techniques were used to identify the potentials and, combined with the company’s process insight, used to achieve the best system design for the reuse of water, energy and chemicals. Separation techniques like membrane filtration have been applied successfully to the process water used in wet processing in both cotton and polyester dyeing. Pilot scale demonstration plants have documented the technical feasibility of water reclamation by this technique, with payback periods of 1–3 years. This payback has, however, so far prevented full-scale implementation.
Water Savings and Reuse in the Textile Industry
Wenzel, H. (author) / Knudsen, H.H. (author)
2005-01-01
21 pages
Article/Chapter (Book)
Electronic Resource
English
Process Water , Water Saving , Payback Period , Soft Water , Water Reclamation Environment , Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution , Water Industry/Water Technologies , Chemistry/Food Science, general , Medicine/Public Health, general , Ecology , Quality Control, Reliability, Safety and Risk
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