Quantifying inhomogeneous mixing
This 750,000 p.e. full-scale plant was simulated using CFD combined with biokinetics (activated sludge model). We tested different scenarios to
optimise plant performance both in terms of performance and cost.
- Liquid and gas flow rates have vast impact on tank performance
- The tank is not completely mixed, even aerated zones have large dead zones
- Large variations in local oxygen en ammonia concentrations
- Location of sensors that serve as input to controllers will be optimised (ongoing)