1. What is DO Consumed Calculation?

The DO (Dissolved Oxygen) Consumed calculation measures the amount of oxygen consumed during the decomposition of organic matter in sewage samples. It's a crucial parameter in wastewater treatment and environmental monitoring.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( DO \) — Dissolved Oxygen Consumed (kg/m³)
• \( BOD \) — Biochemical Oxygen Demand (kg/m³)
• \( V_u \) — Volume of Undiluted Sample (m³)
• \( V \) — Volume of Diluted Sample (m³)

Explanation: This formula calculates the actual oxygen consumption based on the BOD value and the dilution ratio of the sample.

3. Importance of DO Measurement

Details: Accurate DO consumption measurement is essential for assessing wastewater treatment efficiency, determining organic pollution levels, and ensuring compliance with environmental regulations.

4. Using the Calculator

Tips: Enter BOD value in kg/m³, volumes of undiluted and diluted samples in m³. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BOD and DO consumed?
A: BOD measures the potential oxygen demand, while DO consumed measures the actual oxygen consumed during the decomposition process.

Q2: Why is sample dilution necessary in BOD testing?
A: Dilution ensures sufficient oxygen is available throughout the test period and prevents oxygen depletion that could stop microbial activity.

Q3: What are typical DO consumption values in sewage?
A: Values vary widely depending on sewage strength, but typically range from 100-400 mg/L for domestic wastewater.

Q4: How does temperature affect DO consumption?
A: Higher temperatures increase microbial activity and oxygen consumption rates, while lower temperatures slow them down.

Q5: What factors can affect DO consumption measurements?
A: Temperature, pH, nutrient availability, microbial population, and presence of toxic substances can all affect DO consumption rates.