Activated Sludge Process
Categories: Engineering Lab EquipmentThe activated sludge process is the most important biological process in water treatment. It enables this process to be demonstrated.A pump delivers raw water contaminated with dissolved organic subst...
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Description
The activated sludge process is the most important biological process in water treatment. It enables this process to be demonstrated.
A pump delivers raw water contaminated with dissolved organic substances (organic matter) into the aeration tank. Aerobic microorganisms (activated sludge) in the aeration tank use the organic matter as a source of nutrition, biodegrading it in the process. Since aerobic microorganisms need oxygen, the raw water is aerated in the aeration tank. The activated sludge is mixed with the raw water by stirring machines. In the secondary clarifier the activated sludge is then separated from the treated water by sedimentation. A portion of the activated sludge is returned to the aeration tank (return sludge). The treated water is collected in a tank.
Learning Objectives/Experiments
Learning the fundamental principle of the activated sludge process
Functional principle of nitrification and pre-denitrification
Creation of a stable operating state
Identification of the following influencing factors
Return sludge ratio
Reflux ratio of the internal recirculation
Sludge age
Sludge loading
Volumetric loading
oxygen concentration, pH value and temperature
Efficiency of the pre-denitrification
Specification
Biological wastewater treatment
Aeration tank with 3 stirring machines
Secondary clarifier
Nitrification and pre-denitrification
Separate supply unit with 2 stirring machines
All relevant flow rates adjustable
Control of temperature, pH value and oxygen concentration
Measurement of flow rate, temperature, pH value and oxygen concentration
Software for data acquisition via USB under Windows 7, 8.1, 10
Software with display of the operation states
visual inspection with webcam on PC
Technical data
Aeration tank
capacity nitrification zone: approx. 34L
capacity denitrification zone: approx. 17L
Tanks
secondary clarifier: 30L
raw water tank: 200L
treated water tank: 80L
Flow rates
raw water pump: max. 25L/h
return sludge pump: max. 25L/h
circulation pump: max. 25L/h
Speeds (stirring machines)
secondary clarifier: max. 45min-1
all others: each max. 600min-1
Measuring ranges
flow rate:
2…25L/h (raw water)
50…550L/h (compressed air)
temperature: 0…40°C
pH value: 0…14
oxygen concentration: 0…10mg/L
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
quick overview :
The activated sludge process is the most important biological process in water treatment. It enables this process to be demonstrated.
A pump delivers raw water contaminated with dissolved organic substances (organic matter) into the aeration tank. Aerobic microorganisms (activated sludge) in the aeration tank use the organic matter as a source of nutrition, biodegrading it in the process. Since aerobic microorganisms need oxygen, the raw water is aerated in the aeration tank. The activated sludge is mixed with the raw water by stirring machines. In the secondary clarifier the activated sludge is then separated from the treated water by sedimentation. A portion of the activated sludge is returned to the aeration tank (return sludge). The treated water is collected in a tank.
Learning Objectives/Experiments
Learning the fundamental principle of the activated sludge process
Functional principle of nitrification and pre-denitrification
Creation of a stable operating state
Identification of the following influencing factors
Return sludge ratio
Reflux ratio of the internal recirculation
Sludge age
Sludge loading
Volumetric loading
oxygen concentration, pH value and temperature
Efficiency of the pre-denitrification
Specification
Biological wastewater treatment
Aeration tank with 3 stirring machines
Secondary clarifier
Nitrification and pre-denitrification
Separate supply unit with 2 stirring machines
All relevant flow rates adjustable
Control of temperature, pH value and oxygen concentration
Measurement of flow rate, temperature, pH value and oxygen concentration
Software for data acquisition via USB under Windows 7, 8.1, 10
Software with display of the operation states
visual inspection with webcam on PC
Technical data
Aeration tank
capacity nitrification zone: approx. 34L
capacity denitrification zone: approx. 17L
Tanks
secondary clarifier: 30L
raw water tank: 200L
treated water tank: 80L
Flow rates
raw water pump: max. 25L/h
return sludge pump: max. 25L/h
circulation pump: max. 25L/h
Speeds (stirring machines)
secondary clarifier: max. 45min-1
all others: each max. 600min-1
Measuring ranges
flow rate:
2…25L/h (raw water)
50…550L/h (compressed air)
temperature: 0…40°C
pH value: 0…14
oxygen concentration: 0…10mg/L
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
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