Oxygen Transferred under Field Conditions when Correction Factor is 0.85 Calculator

Oxygen Transfer Formula:

\[ N = \frac{N_s \times (DO_{0.85} - DL) \times 0.85 \times (1.024)^{(T-20)}}{9.17} \]

Oxygen Transfer Capacity (N_s):

kg/s/W

D.O Saturation (DO_0.85):

kg/m³

Operation Dissolved Oxygen (DL):

kg/m³

Temperature (T):

°C

Oxygen Transferred (N): kg/s/W

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1. What is Oxygen Transfer under Field Conditions?

Definition: This calculator estimates the actual oxygen transfer rate in wastewater treatment systems when the correction factor is 0.85.

Purpose: It helps environmental engineers determine the efficiency of aeration systems in transferring oxygen to water.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N = \frac{N_s \times (DO_{0.85} - DL) \times 0.85 \times (1.024)^{(T-20)}}{9.17} \]

Where:

\( N \) — Oxygen transferred (kg/s/W)
\( N_s \) — Oxygen transfer capacity (kg/s/W)
\( DO_{0.85} \) — D.O. saturation at correction factor 0.85 (kg/m³)
\( DL \) — Operation dissolved oxygen (kg/m³)
\( T \) — Temperature (°C)

Explanation: The formula accounts for the oxygen transfer capacity, saturation level, operating conditions, and temperature effects.

3. Importance of Oxygen Transfer Calculation

Details: Proper oxygen transfer estimation ensures efficient wastewater treatment, energy optimization, and compliance with environmental regulations.

4. Using the Calculator

Tips: Enter the oxygen transfer capacity, D.O. saturation (default 3.41455 kg/m³), operation dissolved oxygen (default 0.00201 kg/m³), and temperature (default 85°C).

5. Frequently Asked Questions (FAQ)

Q1: Why is the correction factor 0.85 used?
A: 0.85 accounts for the difference between clean water and wastewater conditions in oxygen transfer efficiency.

Q2: What's a typical D.O. saturation value?
A: The default 3.41455 kg/m³ is common, but it varies with atmospheric pressure and water composition.

Q3: How does temperature affect oxygen transfer?
A: Higher temperatures decrease oxygen solubility but increase transfer rates, accounted for by the (1.024)^(T-20) term.

Q4: What is operation dissolved oxygen?
A: It's the actual dissolved oxygen concentration maintained in the treatment process.

Q5: Why divide by 9.17?
A: This converts the units to kg/s/W for standard reporting in aeration system performance.