Oxygen Transferred under Field given Difference between Saturation and Operation Dissolved Oxygen Calculator

Oxygen Transferred Formula:

\[ N = \frac{N_s \times D \times C_f \times (1.024)^{(T-20)}}{9.17} \]

Oxygen Transfer Capacity (N_s):

kg/s/W

Difference between Saturation DO and Operation DO (D):

kg/m³

Correction Factor (C_f):

Temperature (T):

°C

Oxygen Transferred (N): kg/s/W

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1. What is Oxygen Transferred under Field Conditions?

Definition: This calculator determines the actual amount of oxygen transferred from air to water under field conditions, accounting for temperature and other factors.

Purpose: It's essential for wastewater treatment system design and operation to ensure adequate oxygen supply for biological processes.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N = \frac{N_s \times D \times C_f \times (1.024)^{(T-20)}}{9.17} \]

Where:

\( N \) — Oxygen transferred under field conditions (kg/s/W)
\( N_s \) — Oxygen transfer capacity under standard conditions
\( D \) — Difference between saturation and operation dissolved oxygen
\( C_f \) — Correction factor for system characteristics
\( T \) — Temperature in °C

Explanation: The formula adjusts standard oxygen transfer rates for actual field conditions including temperature effects.

3. Importance of Oxygen Transfer Calculation

Details: Accurate oxygen transfer calculations ensure proper aeration system design, energy efficiency, and effective wastewater treatment.

4. Using the Calculator

Tips: Enter the oxygen transfer capacity, DO difference, correction factor (default 0.5), and temperature. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is temperature important in oxygen transfer?
A: Oxygen solubility decreases with increasing temperature, affecting transfer rates.

Q2: What's a typical correction factor value?
A: Common values range from 0.4 to 0.8 depending on aeration system type and wastewater characteristics.

Q3: How do I determine the DO difference?
A: Subtract your operating dissolved oxygen level from the saturation DO at your system temperature.

Q4: What does the 1.024 factor represent?
A: It's the temperature correction coefficient for oxygen transfer in water.

Q5: Why divide by 9.17 in the formula?
A: This converts the result to standard units (kg/s/W) from the empirical relationship.