After discussing the design of the new plant, incl. changing the sewage process from batch treatment to continuous treatment with two-phase secondary treatment, approval planning followed in close consultation with the relevant authorities.
In just five months the plant was completely overhauled: intact structures such as two concrete basins were integrated into the concept as biological basin and sludge tank. A new basin and a hall to house the machinery and plant technology were built. The technical equipment (pumps, stirrers, blowers and wastewater screening unit) as well as the switchgear and wiring were replaced. On top, the plant was equipped with measurement technology for automatic operation.
When wastewater is highly contaminated by one pollutant, the waste-activated sludge does not usually settle well. So we installed a two-phase secondary treatment system consisting of lamella separator and flotation unit to separate wastewater and sludge.
Nutrients needed to supplement the required nitrogen and phosphate quantities in the wastewater process are recycled fully automatically from dry solid fertilisers (urea and ammonium phosphate), which are processed to a nutrient solution in a batching station and dosed as required.
Since completion of the overhaul P.C.S. has been supporting the staff of Norevo Produktion GmbH in operating the plant under a process-engineering maintenance and monitoring agreement.