MLSS Returned given Oxygen Demand of Biomass Solution

STEP 0: Pre-Calculation Summary
Formula Used
MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day)
XR = (((Qs*(Qi-Qo))/f)-O2)/(DO2 *Qw)
This formula uses 8 Variables
Variables Used
MLSS in returned or wasted sludge - (Measured in Kilogram per Cubic Meter) - MLSS in returned or wasted sludge is the mixed liquor suspended solids in returned sludge in terms of mg per litre.
Sewage Discharge - (Measured in Cubic Meter per Second) - Sewage discharge is the flow rate of sewage when it is being discharged in the river.
Influent BOD - (Measured in Kilogram per Cubic Meter) - Influent BOD is the total amount of BOD which is present in the incoming sewage.
Effluent BOD - (Measured in Kilogram per Cubic Meter) - Effluent BOD is the amount of BOD present in the outing sewage.
Ratio of BOD to Ultimate BOD - Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod.
Theoretical Oxygen Requirement - (Measured in Kilogram per Second) - Theoretical oxygen requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products.
Oxygen demand of biomass - Oxygen demand of biomass is the amount of oxygen required.
Volume of Wasted Sludge per day - (Measured in Cubic Meter per Second) - Volume of wasted sludge per day is measured in terms of discharge.
STEP 1: Convert Input(s) to Base Unit
Sewage Discharge: 10 Cubic Meter per Second --> 10 Cubic Meter per Second No Conversion Required
Influent BOD: 11.2 Milligram per Liter --> 0.0112 Kilogram per Cubic Meter (Check conversion here)
Effluent BOD: 0.4 Milligram per Liter --> 0.0004 Kilogram per Cubic Meter (Check conversion here)
Ratio of BOD to Ultimate BOD: 1.6 --> No Conversion Required
Theoretical Oxygen Requirement: 2.5 Milligram per Day --> 2.89351851851852E-11 Kilogram per Second (Check conversion here)
Oxygen demand of biomass: 2 --> No Conversion Required
Volume of Wasted Sludge per day: 9.5 Cubic Meter per Second --> 9.5 Cubic Meter per Second No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
XR = (((Qs*(Qi-Qo))/f)-O2)/(DO2 *Qw) --> (((10*(0.0112-0.0004))/1.6)-2.89351851851852E-11)/(2 *9.5)
Evaluating ... ...
XR = 0.00355263157742446
STEP 3: Convert Result to Output's Unit
0.00355263157742446 Kilogram per Cubic Meter -->3.55263157742446 Milligram per Liter (Check conversion here)
FINAL ANSWER
3.55263157742446 3.552632 Milligram per Liter <-- MLSS in returned or wasted sludge
(Calculation completed in 00.020 seconds)

Credits

Created by Suraj Kumar
Birsa Institute of Technology (BIT), Sindri
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Meerut Institute of Engineering and Technology (MIET), Meerut
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4 MLSS Returned Calculators

MLSS Returned given Oxygen Demand and Ultimate BOD Both
Go MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/(5 days BOD/Ultimate BOD))-Theoretical Oxygen Requirement)/(Oxygen demand of biomass*Volume of Wasted Sludge per day)
MLSS Returned given Oxygen Demand of Biomass
Go MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day)
MLSS Returned given Ultimate BOD
Go MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/(5 days BOD/Ultimate BOD))-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day)
MLSS Returned given Oxygen Required in Aeration Tank
Go MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day)

MLSS Returned given Oxygen Demand of Biomass Formula

MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day)
XR = (((Qs*(Qi-Qo))/f)-O2)/(DO2 *Qw)

What is MLSS ?

Mixed liquor suspended solids (MLSS) is the concentration of suspended solids, in an aeration tank during the activated sludge process, which occurs during the treatment of waste water.

How to Calculate MLSS Returned given Oxygen Demand of Biomass?

MLSS Returned given Oxygen Demand of Biomass calculator uses MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day) to calculate the MLSS in returned or wasted sludge, MLSS Returned given Oxygen Demand of Biomass calculates value ok MLSS when we have prior information of other parameters used. MLSS in returned or wasted sludge is denoted by XR symbol.

How to calculate MLSS Returned given Oxygen Demand of Biomass using this online calculator? To use this online calculator for MLSS Returned given Oxygen Demand of Biomass, enter Sewage Discharge (Qs), Influent BOD (Qi), Effluent BOD (Qo), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O2), Oxygen demand of biomass (DO2) & Volume of Wasted Sludge per day (Qw) and hit the calculate button. Here is how the MLSS Returned given Oxygen Demand of Biomass calculation can be explained with given input values -> 3552.632 = (((10*(0.0112-0.0004))/1.6)-2.89351851851852E-11)/(2 *9.5).

FAQ

What is MLSS Returned given Oxygen Demand of Biomass?
MLSS Returned given Oxygen Demand of Biomass calculates value ok MLSS when we have prior information of other parameters used and is represented as XR = (((Qs*(Qi-Qo))/f)-O2)/(DO2 *Qw) or MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day). Sewage discharge is the flow rate of sewage when it is being discharged in the river, Influent BOD is the total amount of BOD which is present in the incoming sewage, Effluent BOD is the amount of BOD present in the outing sewage, Ratio of BOD to Ultimate BOD is the ratio of 5 days bod to ultimate bod, Theoretical oxygen requirement is the calculated amount of oxygen required to oxidize a compound to its final oxidation products, Oxygen demand of biomass is the amount of oxygen required & Volume of wasted sludge per day is measured in terms of discharge.
How to calculate MLSS Returned given Oxygen Demand of Biomass?
MLSS Returned given Oxygen Demand of Biomass calculates value ok MLSS when we have prior information of other parameters used is calculated using MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(Oxygen demand of biomass *Volume of Wasted Sludge per day). To calculate MLSS Returned given Oxygen Demand of Biomass, you need Sewage Discharge (Qs), Influent BOD (Qi), Effluent BOD (Qo), Ratio of BOD to Ultimate BOD (f), Theoretical Oxygen Requirement (O2), Oxygen demand of biomass (DO2) & Volume of Wasted Sludge per day (Qw). With our tool, you need to enter the respective value for Sewage Discharge, Influent BOD, Effluent BOD, Ratio of BOD to Ultimate BOD, Theoretical Oxygen Requirement, Oxygen demand of biomass & Volume of Wasted Sludge per day and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate MLSS in returned or wasted sludge?
In this formula, MLSS in returned or wasted sludge uses Sewage Discharge, Influent BOD, Effluent BOD, Ratio of BOD to Ultimate BOD, Theoretical Oxygen Requirement, Oxygen demand of biomass & Volume of Wasted Sludge per day. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/Ratio of BOD to Ultimate BOD)-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day)
  • MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/(5 days BOD/Ultimate BOD))-Theoretical Oxygen Requirement)/(1.42*Volume of Wasted Sludge per day)
  • MLSS in returned or wasted sludge = (((Sewage Discharge*(Influent BOD-Effluent BOD))/(5 days BOD/Ultimate BOD))-Theoretical Oxygen Requirement)/(Oxygen demand of biomass*Volume of Wasted Sludge per day)
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