| Related Calculators Overviews | Calculating the Oxygen Requirement Below you can find the typical formulas, coefficients and empirical data used to establish the basic design of a complete mix suspended growth biological sewage wastewater process. To use this calculator please fill in the input value data of your sewer wastewater and as a result some basic plant design and effluent BOD data will follow out of the calculations. If the normal sewer water characteristics are unknown, please press the "typical data" button for an autofill of the input fields.
More information and theory about the Input Parameters and the Kinetic Coefficients you can find in the Documentation. [ Summary Related Calculations ] [ Other Calculators ] [ Converters ] Documentation
This formula will establish the required oxygen of an sewer wastewater treatement plant: Where: | S = | effluent soluble substrate concentration (bsCOD) | [g/m3] or [mg/l] | | Ks = | half-velocity constant, substrate concentration at one-half the maximum specific substrate utilization rate | [g COD/m3]s | | kd = | endogenous decay coefficient | [g VSS/g VSS∙d] | | SRT = | Sedimentation Retention Time | [d] | | Y = | biomass yield | [g VSS/g COD used] | | k = | maximum specific substrate utilization rate | [g COD/g∙d] | | Q = | influent flowrate | [m3/d] | | bsCOD = | biodegradable soluble Chemical Oxygen Demand | [g/m3] or [mg/l] | | MLVSS = | Mixed liquor Volatile Suspende Solids | [g/m3] or [mg/l] | | fd = | fraction of biomass that remains as cell debris | [g VSS/g VSS] | | VSS = | Volatile Suspended Solids | [g/m3] or [mg/l] | | TSS = | Total Suspended Solids | [g/m3] or [mg/l] | |
Process water
Languages 
Deutsch
English
Español
Français
Italiano
Nederlands
Polski
Português