1. What is Mass of BOD?

Mass of BOD is the total amount of oxygen required by microorganisms to decompose the organic matter present in a given volume of water over a specific period. It is a crucial parameter in wastewater treatment design and operation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Mass of BOD — Total oxygen demand (kg)
• Volume of Tank — Capacity of treatment tank (m³)
• Organic Loading — Organic matter concentration (kg/m³)

Explanation: This formula calculates the total mass of biochemical oxygen demand applied to a treatment system based on tank volume and organic loading rate.

3. Importance of BOD Mass Calculation

Details: Accurate calculation of BOD mass is essential for proper sizing of wastewater treatment facilities, determining aeration requirements, and ensuring compliance with environmental regulations.

4. Using the Calculator

Tips: Enter tank volume in cubic meters and organic loading in kg/m³. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What units should be used for inputs?
A: Volume should be in cubic meters (m³) and organic loading in kilograms per cubic meter (kg/m³).

Q2: How is organic loading determined?
A: Organic loading is typically measured through laboratory analysis of wastewater samples for BOD or COD concentrations.

Q3: Why is BOD mass important in treatment design?
A: BOD mass determines the oxygen demand that must be met by the treatment system and influences the sizing of aeration equipment and treatment tanks.

Q4: Can this calculator be used for daily loading calculations?
A: Yes, this calculation provides the mass of BOD applied per day when using daily average values for volume and loading.

Q5: What factors affect organic loading rates?
A: Organic loading rates vary based on wastewater source, industrial contributions, and seasonal variations in wastewater characteristics.