In the metal processing industry, many heavy metals end up in wastewater. These metals must be removed before the wastewater can be discharged. This installation was realised for Henrad in Belgium and Caradon Stelrad in the Netherlands. Both companies are radiator manufacturers.
In the metal industry, various production processes – such as surface treatment, electroplating and rinsing – generate wastewater streams that often contain significant concentrations of heavy metals. Metals such as zinc, nickel, copper and lead are not only environmentally harmful, but can also cause serious damage to sewage networks and water treatment plants when discharged untreated. It is therefore a legal requirement to remove these metals from wastewater before discharge can take place.
Removing heavy metals from wastewater
For this challenge, TASK realised specialised physico-chemical wastewater treatment plants at two leading radiator manufacturers: Henrad in Belgium and Caradon Stelrad in the Netherlands. Both plants were designed to perform optimally within an industrial environment.
The installation consists of several treatment steps:
- Neutralisation and coagulation-flocculation to convert dissolved metals into precipitating compounds.
- Sedimentation and separation of the formed metallic sludge.
- Filter press for dewatering the sludge, significantly reducing its volume.
The dewatered sludge is then disposed of externally to an approved processor.
This integrated approach not only guarantees high efficiency in heavy metal removal, but also ensures stable and compliant discharge to the sewer or surface water.
Thanks to TASK‘s long-standing expertise in industrial water treatment, both projects were custom-designed and successfully implemented. They contribute to a more sustainable production process and responsible handling of valuable raw materials.
