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Examples of simulations of the process steps of a waste water treatment plant - problem solutions by hydrograv
Videos available (Microsoft Media Video)
Bar Screen
- backwater
- unknown loss value
Primary Settling Tank
- insufficient settling
Receiving Water
- hydraulic calculations
- computation of water levels
Grit Channel
- big fraction of mineral particles in effluent
- deposition of organic material
- insufficient separation of fats
Pipeline
- pressure surges and cavitation
- pressure losses
- pressure losses in special facilities and manholes
Pump
- dimensioning
- low endurance
- overloading due to non-uniform incident flow
Stirring Device
- configuration
- verification of sufficient mixing
- overloading due to non-uniform incident flow
Secondary Settling Tank
- sludge overflow
- failure
- inadequate hydraulic capacity
- insufficient performance of the sludge removal system (blade or flight scraper, suction collector)
Aeration Tank
- insufficient mixing
- bypass flows
- insufficient COD-degradation
Stormwater Treatment
- insufficient performance
