Sewage Discharge Given Oxygen Demand Of Biomass Calculator

Formula Used:

\[ Q_{sb} = \frac{f \times (O_2 + (D_{O2} \times Q_w \times X_R))}{Q_i - Q} \]

Ratio of BOD to Ultimate BOD (f):

Theoretical Oxygen Requirement (O₂):

kg/s

Oxygen Demand of Biomass (Dₒ₂):

Volume of Wasted Sludge per day (Q_w):

m³/s

MLSS in Returned or Wasted Sludge (X_R):

kg/m³

Influent BOD (Q_i):

kg/m³

Effluent BOD (Q):

kg/m³

Sewage Discharge (Qₛb):

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1. What is Sewage Discharge Given Oxygen Demand Of Biomass?

Sewage Discharge given Oxygen Demand of Biomass is the volume or rate at which sewage is released or treated based on the oxygen demand required by the biomass present in the sewage. This calculation helps in determining the appropriate treatment capacity and oxygen supply needed for efficient wastewater treatment.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_{sb} = \frac{f \times (O_2 + (D_{O2} \times Q_w \times X_R))}{Q_i - Q} \]

Where:

\( Q_{sb} \) — Sewage Discharge given Oxygen Demand of Biomass (m³/s)
\( f \) — Ratio of BOD to Ultimate BOD
\( O_2 \) — Theoretical Oxygen Requirement (kg/s)
\( D_{O2} \) — Oxygen Demand of Biomass
\( Q_w \) — Volume of Wasted Sludge per day (m³/s)
\( X_R \) — MLSS in Returned or Wasted Sludge (kg/m³)
\( Q_i \) — Influent BOD (kg/m³)
\( Q \) — Effluent BOD (kg/m³)

Explanation: This equation calculates the sewage discharge rate based on the oxygen demand requirements of the biomass and various wastewater parameters.

3. Importance of Sewage Discharge Calculation

Details: Accurate calculation of sewage discharge is crucial for designing efficient wastewater treatment systems, determining appropriate oxygen supply, and ensuring compliance with environmental regulations for effluent quality.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. Ensure that Influent BOD is greater than Effluent BOD, and all values are positive. The calculator will compute the sewage discharge rate in cubic meters per second.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the ratio of BOD to Ultimate BOD?
A: This ratio represents the proportion of biodegradable organic matter that can be oxidized within a specific time frame, typically comparing 5-day BOD to ultimate BOD.

Q2: Why is oxygen demand of biomass important in wastewater treatment?
A: Oxygen demand indicates the amount of oxygen required by microorganisms to decompose organic matter, which is essential for designing aeration systems in treatment plants.

Q3: How does MLSS affect the calculation?
A: Mixed Liquor Suspended Solids (MLSS) concentration affects the biomass activity and oxygen demand, directly influencing the sewage discharge calculation.

Q4: What are typical values for these parameters?
A: Parameter values vary depending on wastewater characteristics, but generally fall within specific ranges based on the type of wastewater and treatment process.

Q5: Can this calculation be used for industrial wastewater?
A: Yes, but industrial wastewater may have different characteristics, so parameter values should be adjusted accordingly based on specific industrial effluent properties.