Waste water treatment units

NISKAE installs a SW200 pilot station for the treatment of wash water from dyeing applications in the textile industry

Our Client, located in France, is an international leader in the field of health and hygiene, committed to improving the well-being of its consumers every day with essential products and solutions for daily life. With its medical expertise and undeniable textile know-how, this compression stocking manufacturer seeks an ecological, responsible, and economical solution to comply with the standards and regulations for the discharge of their dyeing water.

Wastewater management: Regulatory challenges and high disposal costs for our Client

The production of compression stockings involves the use of industrial washing machines for dye application, generating daily between 15 and 25 cubic meters of wastewater mainly containing dye residues. However, our Client cannot discharge this wastewater because it does not comply with current municipal regulations. Without a wastewater treatment station, our Client must store the dyeing water before calling on an external service provider for disposal. However, these disposals incur significant costs for the company.

Implementation of a custom solution

 Flocculation for dyeing application wash water
Flocculation for dyeing application wash water

Initially, NISKAE laboratory experts conduct several tests and analysis following the sampling of wastewater. They developed a custom coagulant-flocculant formulation perfectly suited to our Client’s needs.

The proposed minimal reagent dosage for treating their dyeing wastewater is 0.3 g/L. This reduces the Chromium concentration below 0.01 mg/L, compared to an initial concentration of 0.79 mg/L. Moreover, the solution presented to our Client generates a low volume of sludge to be disposed of, only 10% of the volume of water to be treated. Additionally, the addition of the coagulation reagent does not alter the pH value, ensuring its stability.

Before treatment, the dyeing water was black, but thanks to the custom coagulant-flocculant formulation developed by NISKAE laboratory experts, it is now clean, clear, and compliant with regulatory standards for discharge. Furthermore, the sludge retained by the filtration box is non-sticky and easily dehydrated, allowing for its disposal as waste.

NISKAE provides Clients with a SW200 pilot unit

Semi-Automatic SW200 Treatment Station in a Container
Semi-Automatic SW200 Treatment Station in a Container

To treat their dyeing wastewater from a washing step, our Client sought NISKAE’s expertise for the necessary support throughout the acquisition process of an industrial water treatment station. NISKAE offers the possibility of conducting a preliminary industrial test by renting a semi-automatic SW200 pilot station for a period of 4 to 8 weeks. Our Client opted for the trial proposed by NISKAE.

Given our Client’s needs, NISKAE offers a cost-effective wastewater treatment solution, allowing them to test an SW200 microstation and discover its benefits. With the use of a custom reagent and the pilot installation, our Client was able to treat their dyeing wastewater and discharge it while complying with current regulations.

Purchasing a microstation represents a significant investment, which is why NISKAE offers its clients the pilot trial, with the aim of acquiring an appropriate NISKAE station for their daily water volume. The SW200 pilot station is a solution that allows our Client to test the equipment on a smaller volume of water and see the benefits.

The proposed pilot station consists of:

  • An SW200 ECOMAX water treatment reactor, including timers, relays, and contactor. This allows for the treatment of up to 200L of wastewater per hour;
  • A mobile BIGBAG filtration box for conditioning and dehydrating sludge by gravity;
  • A submersible pump for transferring water from the collection pit to the treatment station.

Significant savings with a complete industrial wastewater treatment solution

NISKAE has met our Client’s needs by offering a comprehensive solution that includes the development of a specific and tailored reagent, as well as a treatment station. The compliance with discharge regulations and the stability of the treatment will now allow our Client to avoid relying on external service providers, leading to a reduction in costs associated with these operations.

Following the trial of this semi-automatic pilot station, our Client is satisfied with the proposed equipment and now wishes to acquire a fully automatic SW2000, which also includes a recycling option. With this acquisition, the company will achieve a return on investment in less than 9 months and save more than 1 million euros after 5 years.