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Septic Tank Capacity Formula:
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Septic tank capacity calculation determines the appropriate size of a septic tank based on the number of users and expected sludge accumulation. In the Philippines, the standard calculation follows: Capacity = Persons × 150 liters + Sludge Volume.
The calculator uses the standard Philippine septic tank formula:
Where:
Explanation: This formula ensures adequate capacity for wastewater treatment while accounting for sludge buildup over time.
Details: Proper septic tank sizing is crucial for effective wastewater treatment, preventing system overload, and ensuring compliance with Philippine sanitation standards.
Tips: Enter the number of persons using the septic system and the expected sludge volume. All values must be valid (persons ≥ 1, sludge volume ≥ 0).
Q1: Why is 150 liters used per person?
A: This is the standard volume per person established in Philippine sanitation regulations for adequate wastewater treatment capacity.
Q2: How do I determine sludge volume?
A: Sludge volume depends on usage frequency and maintenance schedule. Consult local regulations or a sanitation engineer for specific recommendations.
Q3: What are the consequences of undersizing a septic tank?
A: Undersizing can lead to frequent overflows, poor treatment efficiency, environmental contamination, and violation of sanitation codes.
Q4: Are there different standards for commercial establishments?
A: Yes, commercial establishments typically require larger capacity calculations based on peak usage and specific waste characteristics.
Q5: How often should septic tanks be emptied?
A: Typically every 2-3 years for residential use, but frequency depends on tank size, usage, and sludge accumulation rate.