Waste Water Treatment

Rührtechnik für Abwassertechnologie

Rugged and energy-efficient

System solutions by Stelzer Rührtechnik for digestion tower systems (= biogas production), nitrification, denitrification, flocculation, precipitation, activation basin, sludge storage, pumping stations, sand traps, buffers and chemical additive tanks, trough mixers and final storage

  • Blending
  • Suspending
  • Floating layer intake
  • Gassing

Stelzer Rührtechnik recommends top-entry and side-entry agitators for waste water treatment plants, depending on the process step. We do not just use standard solutions but consequently apply individual adaptations and further developments that put our agitators ahead of competing products.

Highly efficient axial flow and counter-current flow impellers with optimised, low shear rates ensure maximum product protection. Side-entry agitators have reliable drive and sealing systems and can on request be equipped with fast change device to replace seals on a full tank. The top entry agitators are furthermore equipped with shaft settling device for the protection of the agitator shafts, water-cup sealing technology with easy monitoring and overhung agitator shafts without a bottom bearing with up to 25 m shaft lengths. Stelzer Rührtechnik calculates the agitators and their axial forces, bending and torque already in the design phase, unlike conventional systems that are more prone to faults. The harmonic resonance frequencies (critical rotation speeds) are eliminated from the working range of the agitator by design.

Agitation processes require individual adaptations

Stelzer Rührtechnik relies on verification, prevention and further development through computer simulations and tests in the in-house laboratory to ensure optimal results. Individual solutions in close cooperation with our customers are safely based on detailed analyses (also in the field of rheology). System solutions often allow the replacement of old methods by more economical methods.

Product wetted parts for agitator shafts or agitator systems used in waste water treatment technology that are in contact with the product are always made of stainless steel.