Our Client is a company with a certified quality production process, working at an International level since 1960. They produce seamless cold-drawn steel tubes according to EN 10305-1 and welded cold-drawn precision steel tubes according to EN 10305-2, for automotive, hydraulic and mechanical applications.
The main requirements of the customer, usually found as one of the major problems for all the players of this sector, were related to the use of a chemical-physical wastewater treatment plant that did not allow to comply with the discharge limits required by law and producing a significant amount of sludge, with high operating costs, particularly due to the need to maintain the plant constantly monitored.
The Solution provided
We provided the customer with a ZLD solution (zero liquid discharge) that allows to reuse both the distillate and the concentrate, respecting the local environmental regulations and dramatically reducing the disposal costs and the presence of operational staff dedicated to monitoring system.
The sulfuric acid base pickling washing water is treated with a vacuum heat pump evaporator EVALED® PC E 12000.
The phosphating washing water is treated with an evaporator with mechanical recompression of the vapour EVALED® TC 15 000 AA.