Volume Of Aeration Tank Calculator

Formula Used:

\[ V = \frac{Y \times Q_s \times (Q_i - Q_o) \times \theta_c}{X \times (1 + K_e \times \theta_c)} \]

Maximum Yield Coefficient (Y):

Sewage Discharge (Qs):

m³/s

Influent BOD (Qi):

kg/m³

Effluent BOD (Qo):

kg/m³

Sludge Age (θc):

seconds

MLSS (X):

kg/m³

Endogenous Respiration Rate Constant (Ke):

1/s

Volume of Tank (V):

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1. What is the Volume of Aeration Tank Formula?

The Volume of Aeration Tank formula calculates the required tank capacity for wastewater treatment processes. It considers various factors including maximum yield coefficient, sewage discharge, BOD levels, sludge age, MLSS concentration, and endogenous respiration rate.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \frac{Y \times Q_s \times (Q_i - Q_o) \times \theta_c}{X \times (1 + K_e \times \theta_c)} \]

Where:

\( V \) — Volume of Tank (m³)
\( Y \) — Maximum Yield Coefficient
\( Q_s \) — Sewage Discharge (m³/s)
\( Q_i \) — Influent BOD (kg/m³)
\( Q_o \) — Effluent BOD (kg/m³)
\( \theta_c \) — Sludge Age (seconds)
\( X \) — MLSS (kg/m³)
\( K_e \) — Endogenous Respiration Rate Constant (1/s)

Explanation: This formula calculates the required volume of an aeration tank based on the biological treatment process parameters and wastewater characteristics.

3. Importance of Volume Calculation

Details: Accurate volume calculation is crucial for designing efficient wastewater treatment systems, ensuring proper aeration, and maintaining optimal biological treatment conditions.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. Ensure values are positive and within reasonable ranges for wastewater treatment applications.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for Maximum Yield Coefficient (Y)?
A: Y typically ranges from 0.4 to 0.8 mg cells/mg substrate for most wastewater treatment applications.

Q2: How does sludge age affect tank volume?
A: Longer sludge ages generally require larger tank volumes to maintain the necessary biomass concentration.

Q3: What are common MLSS values in aeration tanks?
A: MLSS typically ranges from 1500-4000 mg/L (1.5-4.0 kg/m³) in conventional activated sludge systems.

Q4: Why is the endogenous respiration rate important?
A: It accounts for biomass decay and maintenance energy requirements, affecting the overall biomass yield and oxygen demand.

Q5: Can this formula be used for all types of wastewater?
A: While generally applicable, specific wastewater characteristics may require adjustments to the parameters or alternative calculation methods.