Oxygen Equivalent Given Self Purification Constant With Critical Oxygen Deficit Calculator

Formula Used:

\[ Lt = \frac{Dc \times f}{10^{-KD \times tc}} \]

Critical Oxygen Deficit (Dc):

kg/m³

Self-Purification Constant (f):

unitless

Deoxygenation Constant (KD):

1/s

Critical Time (tc):

Oxygen Equivalent (Lt):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Oxygen Equivalent?

Oxygen Equivalent refers to the oxidizable organic matter present in sewage. It represents the amount of oxygen required to oxidize the organic substances in wastewater, which is a key parameter in assessing water quality and treatment requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Lt = \frac{Dc \times f}{10^{-KD \times tc}} \]

Where:

\( Lt \) — Oxygen Equivalent (kg/m³)
\( Dc \) — Critical Oxygen Deficit (kg/m³)
\( f \) — Self-Purification Constant (unitless)
\( KD \) — Deoxygenation Constant (1/s)
\( tc \) — Critical Time (s)

Explanation: This formula calculates the oxygen equivalent by considering the critical oxygen deficit, self-purification constant, deoxygenation rate, and the critical time when minimum dissolved oxygen concentration occurs.

3. Importance of Oxygen Equivalent Calculation

Details: Calculating oxygen equivalent is crucial for wastewater treatment design, assessing water pollution levels, and determining the oxygen demand of organic matter in sewage. It helps in designing appropriate aeration systems and evaluating the efficiency of treatment processes.

4. Using the Calculator

Tips: Enter all values in appropriate units. Critical Oxygen Deficit and Oxygen Equivalent are in kg/m³, Self-Purification Constant is unitless, Deoxygenation Constant is in 1/s, and Critical Time is in seconds. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is Critical Oxygen Deficit?
A: Critical Oxygen Deficit refers to the condition where the deoxygenation rate exceeds the reoxygenation rate, representing the maximum oxygen deficit in a water body.

Q2: What does Self-Purification Constant represent?
A: Self-Purification Constant is the ratio of reoxygenation constant to deoxygenation constant, indicating the natural purification capacity of a water body.

Q3: How is Deoxygenation Constant determined?
A: Deoxygenation Constant is obtained from experimental data on oxygen decomposition in sewage and varies based on temperature and organic content.

Q4: What is Critical Time in this context?
A: Critical Time refers to the time when the minimum dissolved oxygen concentration occurs, found by differentiating the dissolved oxygen equation with respect to time.

Q5: What are typical values for these parameters?
A: Values vary depending on wastewater characteristics, but typically: Dc ranges 0.0001-0.001 kg/m³, f ranges 0.6-1.2, KD ranges 0.1-0.4 per day, and tc ranges several hours to days.