To meet the client’s needs, the ClearFox® team offered a containerised treatment plant with a submerged fixed bed. This was initially available as a leasing system with a purchase option after six months. The fixed-bed container consists of three cascades through which the wastewater flows. With each cascade, the growth area of the fixed-bed material increases – from 100 m²/m³ to 150 m²/m³ to 200 m²/m³. A submersible pump conveys the wastewater from the pump sump into the container treatment plant and from there into the aerated secondary clarifier.
The ClearFox® team built the containerised wastewater treatment plant entirely at the main facility in Bayreuth and carried out a comprehensive test there. Therefore, the installation on site was limited to one day. Full start-up of the biology was achieved after only a few weeks, with the biology achieving initial cleaning performance after only a few days. This meant that there was nothing to prevent the treated wastewater from being discharged directly into the Altmühl.
Through the leasing offer, the wastewater association tested the containerised wastewater treatment plant extensively. Since it was very satisfied with the constant cleaning performance and the low maintenance effort, it decided to buy the plant after only five months. To date, no changes to the settings have been necessary.
