Regular cleaning of painting tools involves the discharge of approximately 200 liters of wash water per day, waste water which could be treated and recycled by our customer. At present, process water is stored before being removed for disposal by an external service provider, incurring disposal and reprocessing costs amounting to CAD 500 per m3. This wastewater consists mainly of paint residues. NISKAE is in a position to offer a coagulation and flocculation solution, enabling this customer to treat its wastewater quickly, efficiently and in an environmentally-friendly way.

With a view to putting an end to the discharge of its process water, our customer sent us a sample of its wastewater in order to find a tailor-made solution for recycling its wash water. Following an in-depth analysis and various laboratory tests, our experts were able to develop a solution tailored to our customer’s needs. The effluent, mainly loaded with iron, could be treated with just 3.5g/L of the coagulant-flocculant reagent, to reduce the concentration of this metal from 0.30 mg/L to below 0.01 mg/L. All heavy metal concentrations are reduced to below 0.01 mg/L at the end of treatment. The sludge generated by the treatment process is non-sticky and easily dewatered, resulting in a clean, clear, translucent filtrate that was initially brown and opaque. What’s more, the original neutral solution maintains a pH of around 7 after treatment.

In order to treat the wash water resulting from the painting of facades and buildings, our customer called on NISKAE’s expertise to provide the necessary support throughout the process of acquiring an industrial water treatment plant.

Given our customer’s needs, NISKAE proposed a SW100 treatment plant enabling the company to carry out the water treatment and recycling process in complete autonomy.
The proposed plant is semi-automatic, providing treatment batches of 100L, and equipped with all the safety features required for safe industrial operation.

It comprises :

• A washing station used by painters to clean paint application tools. The washing station incorporates a 250-litre dirty water collection tank.
• A semi-automatic SW100 treatment reactor, with a capacity of 100L per batch.
• A 500L treated water storage tank, equipped with a booster pump and a range of filters, enables clear water to be recovered and reused for new washes. s. The recycling tank incorporates a heating resistor for temperature control and constant, regular maintenance.

Thanks to the complete solution developed by NISKAE, comprising a suitable mono-reagent and a treatment plant, the customer company is able to recycle its wastewater. What’s more, this physico-chemical treatment has an ecological advantage, as it enables the customer to treat its wastewater for reuse. In addition, savings of 75% will be achieved annually, as well as savings of CAD 50,000 over 5 years, while our customer will benefit from a return on investment of less than two years.