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The Volume of Tank calculation determines the required capacity of a flocculation and mixing tank in wastewater treatment systems based on sewage flow, influent BOD, food to microorganism ratio, and MLSS concentration.
The calculator uses the formula:
Where:
Explanation: This formula calculates the necessary tank volume to maintain proper treatment efficiency by balancing the organic loading (food) with the microbial population.
Details: Accurate tank volume calculation is crucial for designing efficient wastewater treatment systems, ensuring proper mixing and flocculation, and maintaining optimal treatment performance while preventing system overload.
Tips: Enter sewage flow in m³, influent BOD in kg/m³, food to microorganism ratio, and MLSS concentration in kg/m³. All values must be positive numbers greater than zero.
Q1: What is the typical range for Food to Microorganism Ratio?
A: The FM ratio typically ranges from 0.05 to 0.3 day⁻¹ for conventional activated sludge systems, depending on treatment objectives and wastewater characteristics.
Q2: How does MLSS concentration affect tank volume?
A: Higher MLSS concentrations allow for smaller tank volumes as more microorganisms are available to treat the same organic load, but excessively high concentrations can cause settling problems.
Q3: What factors influence the optimal tank volume?
A: Factors include wastewater characteristics, desired treatment efficiency, temperature, oxygen transfer capacity, and mixing requirements.
Q4: How often should tank volume calculations be reviewed?
A: Calculations should be reviewed whenever there are significant changes in wastewater flow, composition, or treatment objectives to ensure optimal system performance.
Q5: Can this calculation be used for different types of treatment systems?
A: While primarily used for activated sludge systems, the principle can be adapted for other biological treatment processes with appropriate modifications to parameters.