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    Technical-Economical Analysis

    The WASATEX project aims to improve the reuse of treated water in industrial processes, such as the textile industry, through an innovative combination of new technologies, pursuing both goals as the ECO SUSTAINABILITY of the system and both the COST SAVINGS.

    The expected environmental impacts of the project are linked to a significant decrease in well water consumption, to reducing of needed natural gas to heat the water to the process temperature, to the resulting reduction in CO2 emissions and to a lower use of chemicals in industrial processes.
    On the other hand, the implemented treatment plant will result in a slight increase of the energy consumption for the power supply of the new systems of osmosis, nanofiltration and OX, which, however, are largely offset by the overall energy balance.

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    foto2Considering the recycled water has an average temperature of 30 °C, against a temperature of 15 °C of the well water, there will get an energy saving since the industrial boiler will heat the water up to the operating temperature, starting from a temperature of 30 °C instead of 15 °C.

    foto3Considering that CO2 emissions due to burned natural gas is equal to 2.276 g/Nm3 and that there is a reduction of natural gas consumption of 1.832 Nm3/day, CO2 emissions can be reduced of about 4.170 kgCO2/day, amounted to 1.251 tons CO2/year.

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    Other benefits result from this innovative technology and they are obtained thanks to the high quality of produced water (RO permeate), which, re-used in industrial processes, allows the following improvements:

    1. The permeate water has chemical characteristics such as to facilitate the processes of finishing, as well as the repetition of these processes.
    2. The quality of permeate water is technically perfect and stable. There are not seasonal variations in the characteristics of the water. This avoids adjustments on dyeing recipes, during the year, ensuring the repeatability of dyes.
    3. The colors of yarn and fabrics are more stable, both to the rubbing and in the light. They are also more brilliant, because they are not opacified by the presence of salts.
    4. In the dyeing processes, chemicals such as soaps, sequestering and equalizing are used in reduced quantity.
    5. Fewer number of dyeing’s remaking is necessary to correct tone variations, due to water quality.
    6. The permeate water can be used also in boilers: in this way, it is possible to save chemical products, such as sequestering agents, to do not dirty the pipes of the heat exchanger, to reduce maintenance, to maintain high yield of water-vapor exchange and to optimize the energy consumption. Additionally, the drains of the boiler are reduced, with a consequent energy saving (the temperature of the purge is about 90 °C).

    The Wasatex technology is TAILOR-MADE and FLEXIBLE: according to the characteristics of the water to be treated, to customer requirements and local restrictions, a solution tailored to the specific situation will be designed, inserting new technologies also in existing plants as per the Osijek installation