1. What is Food To Microorganism Ratio?

Food To Microorganism Ratio is actually a measurement of the amount of incoming food divided by the Lbs of Microorganisms in your system. It's a critical parameter in wastewater treatment processes.

2. How Does the Calculator Work?

The calculator uses the Food To Microorganism Ratio formula:

Where:

• \( Q \) — Sewage Flow (m³)
• \( Q_i \) — Influent BOD (kg/m³)
• \( X \) — MLSS concentration (kg/m³)
• \( V \) — Volume of Tank (m³)

Explanation: The formula calculates the ratio of food (BOD) supplied to the microorganisms present in the aeration tank.

3. Importance of FM Ratio Calculation

Details: The FM ratio is crucial for maintaining optimal biological treatment efficiency. It helps determine the appropriate food supply for microorganisms in wastewater treatment systems.

4. Using the Calculator

Tips: Enter sewage flow in m³, influent BOD in kg/m³, MLSS concentration in kg/m³, and tank volume in m³. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal FM ratio range?
A: The ideal FM ratio typically ranges between 0.2-0.6 day⁻¹ for conventional activated sludge processes.

Q2: What happens if FM ratio is too high?
A: A high FM ratio indicates insufficient microorganisms, leading to poor treatment efficiency and potential system failure.

Q3: What happens if FM ratio is too low?
A: A low FM ratio indicates excess microorganisms, which can lead to poor settling and potential bulking issues.

Q4: How often should FM ratio be monitored?
A: FM ratio should be monitored daily or weekly depending on the treatment plant size and influent characteristics.

Q5: Can FM ratio vary seasonally?
A: Yes, FM ratio can vary with seasonal changes in temperature, influent characteristics, and microbial activity.