Along with NSI Global Office and local sub-suppliers, NSI CE has developed a winning conceptual solution for the WWTP modernization. Based on this concept, an offer has been prepared for the wastewater treatment plant in the“technological turnkey format.”
Nine different sources, primarily the paint shop, will contribute production wastewater. The system will direct this wastewater into two buffer tanks, separating it based on pollution levels. After equalization, the flow from the phosphating and optionally degreasing streams will move to a flocculation-flotation system. This stage will significantly reduce insoluble pollutants. Operators will add Fe(III), caustic/SAX, and anion PE to trigger co-precipitation of metals.
The process will maintain a pH of 6.5–7.0 for metal separation. However, not all metal hydroxides will reach sufficient insolubility at this range. In such cases, operators will add an additional precipitating agent to meet discharge requirements. After coagulation and metal precipitation, the system will proceed with flocculation and flotation.
To minimize sludge volume destined for disposal, the setup includes a sludge dewatering system based on a screw press.
