Volume of Tank
Volume of Tank is defined as the capacity of flocculation and mixing tank.
Symbol: V
Measurement: VolumeUnit: m³
Note: Value should be greater than 0.
Maximum Yield Coefficient
Maximum Yield Coefficient Y represents the maximum mg of cells produced per mg organic matter removed.
Symbol: Y
Measurement: NAUnit: Unitless
Note: Value should be between 0.4 to 0.8.
Sewage Discharge
Sewage discharge is the flow rate of sewage when it is being discharged into the water body.
Symbol: Qs
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Influent BOD
Influent BOD is the total amount of BOD which is present in the incoming sewage.
Symbol: Qi
Measurement: DensityUnit: mg/L
Note: Value should be greater than 0.
Effluent BOD
Effluent BOD is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a water sample at a certain temperature over a specific time period.
Symbol: Qo
Measurement: DensityUnit: mg/L
Note: Value should be greater than 0.
Sludge Age
Sludge Age is the average time for which the particle of suspended solids remains in aeration.
Symbol: θc
Measurement: TimeUnit: d
Note: Value should be greater than 0.
MLSS
MLSS is the sum of volatile suspended solids (organics) and fixed suspended solids (inorganics).
Symbol: X
Measurement: DensityUnit: mg/L
Note: Value should be between 1000 to 6500.
Endogenous Respiration Rate Constant
Endogenous Respiration Rate Constant is used for designing a complete-mix activated-sludge system.
Symbol: Ke
Measurement: First Order Reaction Rate ConstantUnit: d⁻¹
Note: Value should be greater than 0.