1. What is Volume of Undiluted Sample?

The Volume of Undiluted Sample refers to the total space occupied by the undiluted sample in BOD (Biochemical Oxygen Demand) testing. It is a crucial parameter in wastewater analysis and environmental monitoring.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: This formula calculates the volume of the original undiluted sample based on the dissolved oxygen consumed, volume of diluted sample, and the biochemical oxygen demand.

3. Importance of BOD Calculation

Details: Accurate BOD measurement is essential for assessing water quality, determining the effectiveness of wastewater treatment processes, and monitoring environmental pollution levels.

4. Using the Calculator

Tips: Enter DO consumed in kg/m³, volume of diluted sample in m³, and BOD value in kg/m³. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is BOD testing used for?
A: BOD testing measures the amount of oxygen consumed by microorganisms while decomposing organic matter in water, indicating water quality and pollution levels.

Q2: Why is sample dilution necessary in BOD testing?
A: Sample dilution ensures that sufficient oxygen is available for microorganisms throughout the test period and prevents oxygen depletion.

Q3: What are typical BOD values for different water types?
A: Clean water typically has BOD below 5 mg/L, moderately polluted water 5-10 mg/L, and severely polluted water above 10 mg/L.

Q4: How does temperature affect BOD testing?
A: BOD testing is typically conducted at 20°C as temperature significantly affects microbial activity and oxygen consumption rates.

Q5: What is the standard incubation period for BOD testing?
A: The standard BOD test uses a 5-day incubation period at 20°C, known as BOD₅.