D.O Saturation Formula (Correction Factor 0.8):
From: | To: |
Definition: This calculator determines the dissolved oxygen saturation level in sewage when the correction factor is 0.8, based on oxygen transfer parameters and temperature.
Purpose: It helps wastewater treatment professionals assess the oxygen saturation levels in sewage systems, which is crucial for biological treatment processes.
The calculator uses the formula:
Where:
Explanation: The formula calculates the maximum dissolved oxygen concentration adjusted for the correction factor of 0.8, considering temperature effects and existing dissolved oxygen levels.
Details: Proper D.O saturation estimation ensures effective biological treatment of sewage, maintains aerobic conditions, and helps optimize aeration systems.
Tips: Enter the oxygen transfer parameters (N and Ns), temperature in °C, and current dissolved oxygen level (DL). All values must be positive (except DL which can be zero).
Q1: Why is the correction factor 0.8 used?
A: The 0.8 correction factor accounts for typical field conditions in sewage treatment where oxygen transfer efficiency is about 80% of theoretical.
Q2: What does the 9.17 constant represent?
A: This is a conversion factor that accounts for standard conditions and units in the oxygen transfer equation.
Q3: How does temperature affect the calculation?
A: The (1.024)^(T-20) term adjusts for temperature effects on oxygen solubility and transfer rates.
Q4: What are typical values for N and Ns?
A: These vary by system but typically range from 0.0001 to 0.001 kg/s/W for wastewater treatment applications.
Q5: When would DL be zero?
A: DL would be zero when calculating saturation levels in completely deoxygenated water before aeration begins.