Cost-optimised wastewater treatment in the optical industry

ZEISS Sport Optics considerably reduces disposal costs at Wetzlar site with a compact Lugan® 20,000 flotation plant from EnviroChemie.

What we did

High quality lenses and prisms are among the products of the Zeiss Sport Optics plant located at Wetzlar. Polishing, grinding and rinsing wastewater containing heavy metals and contaminated with suspended matter is produced during optical glass processing at the site.

This is treated in a physicochemical partial current process with a Lugan® flotation plant in order to achieve the required limit values. It is then discharged into the sewerage system.

  • Objective

    Objective

    The grinding water that is produced during manufacturing at ZEISS Sport Optics contains heavy metals and is contaminated with suspended matter. The company commissioned Envirochemie to find the appropriate plant solution in order to generate cost savings and comply with limit values.

  • Solution

    Solution

    Our industry experts chose a Lugan® 20,000 flotation plant with a capacity of 8 – 10 m³/h for the wastewater treatment. The flocculation and flotation plant treats 60 m³ of grinding wastewater containing heavy metals and contaminated with suspended matter per day in three shifts, so that it can be discharged into the sewerage system.

    A free-standing 40 m³ mixing and equalisation tank upstream of the Lugan® plant replaces the pre-separator and retention tank, which was installed in the floor and needed to be cleaned of settleable materials periodically.

    Our scope of services: consultation, assistance with planning and approval processes, supply of the plant, installation, commissioning, service and testing

  • Benefits

    Benefits

    The process used led to a significant reduction in disposal costs, because the dewatered sludge which is produced at the chamber filter press is the only substance which must be disposed of. Cleaning of tanks installed in the floor no longer required.

    The required discharge values are reliably adhered to.

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Contact

General contact

General contact

+49 6154 6998 100