The effluent is generated from the plating on connectors with elements such as Nickel, Tin, Gold and Silver with all their associated pre-treatment. At the time, Harwin was using 10m3/h of water and the trade effluent agreement was to be reviewed.
Recycling on Ion exchange resin
Because it precipitates at low pH and would eventually clog a conventional recycling system, Puretech Env. developed a solution for the selective removal of tin. The core process of the implemented solution is a recycling system based on macroporous ion exchange resin operating at 10m3/h. The resulting effluent is treated in a batch reactor which offers supreme control over the discharge as each batch is analysed before release is authorised.
Coupled with a re-arrangement of the rinse structures and an adequate stream segregation, Harwin is now discharging only 10m3 per week as opposed to 10m3 per hour and has enjoyed a 100% compliance with the new trade effluent agreement.
"Puretech Environmental have carried out numerous installation projects at our Washington Campus, each project was carried out to the highest standard. Their attention to detail along with their attitude towards Health and Safety makes them world class in their industry."
