Oxygen Transferred under Field Conditions when Correction Factor is 0.8 Calculator

Oxygen Transferred Formula:

\[ N = \frac{N_s \times (DO_{0.8} - DL) \times 0.8 \times (1.024)^{(T-20)}}{9.17} \]

Oxygen Transfer Capacity (N_s):

kg/s/W

D.O Saturation (DO_0.8):

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 Transferred under Field Conditions?

Definition: This calculator determines the actual amount of oxygen transferred in wastewater treatment systems under field conditions when the correction factor is 0.8.

Purpose: It helps environmental engineers and wastewater treatment professionals optimize aeration systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N = \frac{N_s \times (DO_{0.8} - DL) \times 0.8 \times (1.024)^{(T-20)}}{9.17} \]

Where:

\( N \) — Oxygen transferred (kg/s/W)
\( N_s \) — Oxygen transfer capacity (kg/s/W)
\( DO_{0.8} \) — D.O. saturation when correction factor is 0.8 (kg/m³)
\( DL \) — Operation dissolved oxygen (kg/m³)
\( T \) — Temperature (°C)

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

3. Importance of Oxygen Transfer Calculation

Details: Accurate oxygen transfer calculations are crucial for designing efficient aeration systems that maintain proper dissolved oxygen levels for biological treatment processes.

4. Using the Calculator

Tips: Enter the oxygen transfer capacity, D.O. saturation at 0.8 correction factor, operating dissolved oxygen level, and temperature. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is the correction factor 0.8 used?
A: The 0.8 correction factor accounts for the difference between clean water and wastewater conditions in oxygen transfer efficiency.

Q2: 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.

Q3: What are typical values for DO_0.8?
A: This varies with altitude and temperature, but typically ranges from 7-9 mg/L (0.007-0.009 kg/m³) for wastewater.

Q4: Why divide by 9.17 in the formula?
A: This conversion factor relates the units of measurement (kg/s/W) to standard conditions.

Q5: How can I improve oxygen transfer efficiency?
A: Methods include optimizing diffuser placement, maintaining proper mixing, and controlling dissolved oxygen levels.