With a strategy focused on innovation and the search for new technologies, our Customer, headquartered in France, works with academic and technical partners all over the world. The company has 4 industrial sites on four continents, and offers expertise in various sectors such as aeronautics, energy, construction and automotive. The manufacture of technical fibers requires a coating stage, in which a resin is applied to the textile to form a plastic layer after drying. Additives such as softeners, fixers, thickeners and pigments are also added to the coating process. Our customer would like to use NISKAE to eliminate the various substances found in the wash water from the coating process.
Our customer washes its coating machines several times a day, generating a daily wastewater volume of around 15,000 liters, mainly containing varnish residues, TSS and COD. As part of its operating decree, our customer is required to treat its wastewater with COD (Chemical Oxygen Demand) as the main corrective criterion. The COD level must be less than 800 mg/L. NISKAE offers a coagulation-flocculation process to secure this discharge.
The NISKAE team carried out a complete study of the various plant effluents generated by the three main process stages. To this end, several samples were taken, and laboratory tests were carried out following several protocols for dosing and adjusting parameters such as temperature, pH and conductivity.
The physico-chemical treatment solution proposed for the plant’s overall effluent required the dosage of 2 g/L of a unique coagulant-flocculant product, enabling COD to be lowered, heavy metals to be reduced and washing water to be clarified. The COD level was lowered to 142 mg/L, enabling our customer to ensure compliance with discharge parameters at all times. This result was achieved thanks to COD reductions of between 30% and 50% on the various samples. As for heavy metals, the customized formulation developed by the NISKAE laboratory reduced iron concentrations from 0.27 mg/L to 0.02 mg/L and zinc from 0.10 mg/L to 0.03 mg/L.
NISKAE was able to respond to the needs of its industrial customer by developing an adapted and specific reagent enabling water to be discharged directly into the pipeline, while complying with current regulations. The conformity of the discharge and the stability of the treatment will enable our Customer to avoid the operating constraints and financial costs associated with exceeding limit values.