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Combination of constructed wetland and upgraded aop reactor for wastewater treatment in the textile finishing industry

The goal is the development and implementation of a reliable, cost-effective tailor-made wastewater technology train with a focus on the removal of specific substances in order to regulate wastewater treatment policy.

Water is an important natural resource for sustainable ecosystems, human life and economic development. Management of technological wastewater includes an interdisciplinary and multidisciplinary approach and adjustment with more and more rigorous legislation. Organic contaminants in wastewater present a specific problem due to their toxicity, bioaccumulation and poor bio-degradability. The textile industry is one of the biggest water consumers in Europe. Processes where most water is consumed are printing and dyeing, on average 100-150 m3/t, with annual consumption at the European level of 600 million m3. Besides being one of the greatest consumers of water, the textile industry is also one of the highest pollutants because of the large use of numerous organic compounds and different auxiliary substances. On average, 90% of the water input in textile finishing operations needs to be treated end-of-pipe and 1 kg of chemicals and auxiliaries is processed per kg of textile products. In Europe, 108 million tons of wastewater are produced on a yearly basis and 36 million tons of chemicals and auxiliaries have to be removed from the textile wastewater. Specific water usage rates may vary among different textile operations from 50 to over 500 m3/t. Textile wastewater typically contains a complex mixture of organic and inorganic chemicals, and this is the reason that the processes of cleaning and recycling of wastewater are difficult to perform. Organic contaminants in wastewater present a specific problem due to their toxicity, bioaccumulation and poor biodegradability. The price for waste water treatment varies on average from 0.5-2.5 euro/m3 and it is expected that the price in the future will increase (estimated value is from 3-5 euro/m3). Due to strict environmental legislation and high wastewater treatment costs, the proposed project activities will be oriented towards developing an effective wastewater technology train in the textile company TEKSTINA. The individualised and pre-selected technology train concept for textile wastewater treatment will combine a constructed wetland (CW), pre-filtration and advanced oxidation unit. During the project, each unit will be studied as an individual treatment step and also as a train technology treatment with an adequate combination to achieve the best water quality for the lowest price. TEKSTINA as an end user in this project, is an SME (Small and Medium-sized Enterprise), manufacturing and marketing fashion and technical fabrics. TEKSTINA has a different production orientation, using different raw materials and therefore heterogeneous dyes and auxiliaries. The most important fact is that production orientation in TEKSTINA is changing rather quickly to adapt to market demands and the wastewater load is changing consequently. The company has serious problems with more efficient use of its water resources and with the highly coloured effluent discharge into the environment. This is why the reduction of fresh water in its industrial processes and their effluent discharge into the environment (high taxes), beside their product quality and process stability, are of major concern to it. The actual wastewater treatment solution (end-of-pipe) does not give satisfactory results and the company is seeking an urgent solution.
Acronym: 
TT4TXT
Project ID: 
4 477
Start date: 
01-09-2008
Project Duration: 
36months
Project costs: 
640 000.00€
Technological Area: 
Water Pollution / Treatment
Market Area: 
Water treatment equipment and waste disposal systems

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.