The SBR process is a biological, aerobic wastewater treatment process. In contrast to the classic activated sludge process, the individual process steps are not continuous and do not take place simultaneously, but rather are carried out in batches and sequentially in one single reactor.
The reactor is equipped with a compressor for aeration and a stirring machine. The stirring machine ensures sufficient mixing of the reactor contents even in phases without aeration (denitrification). At the end, the treated water (clear water) is extracted from the reactor and collected in a tank. This is done with a floating device, as is typical for the SBR process. Above the reactor is a device for metering an external carbon source (e.g. sugar solution) if required.
Learning Objectives And Experiments
- How the SBR process works
- Elimination of nitrogen by nitrification and denitrification
- Influence of cycle design on treatment results
- Recording and interpretation of chronological concentration patterns
- Determining conversion rates
- Sedimentation properties of activated sludge
Specification
- Discontinuous activated sludge process
- Sequencing Batch Reactor (SBR)
- Stirring machine with timer and continuously adjustable speed
- Compressor with timer for aeration
- Floating device for extraction of the treated water
- Metering device for external carbon source
- Flow meter for aeration
- Tanks for wastewater and treated water
- Measurement of pH value, temperature and oxygen concentration
- Process controller with touchscreen for displaying process variables and for controlling the oxygen concentration
Technical Data
- Trickling filter
- diameter: approx. 340mm
- height: approx. 1000mm
- capacity: approx. 90L
- Rotary distributor
- max. speed: approx. 2min-1
- Tanks
- wastewater tank: 300L
- collecting tank: 90L
- secondary clarifier: 30L
- Flow rates
- wastewater pump: max. 25L/h
- circulation pumps: 2x max. 25L/h
- return sludge pump: max. 25L/h
- compressor: max. 600L/h
- Carrier material
- specific surface: 180 or 300m2/m3
- Measuring ranges
- flow rate:
- 2…25L/h (wastewater)
- 5…65L/h (recirculation)
- 50…900L/h (aeration)
- 230V, 50Hz, 1 phase
- 230V, 60Hz, 1 phase
- 120V, 60Hz, 1 phase
