1. What is Septic Tank Capacity Calculation?

Septic tank capacity calculation determines the appropriate size of a septic tank based on the number of users. In the Philippines, the standard is 150 liters per person per day to ensure proper wastewater treatment and prevent system overload.

2. How Does the Calculator Work?

The calculator uses the standard Philippine formula:

Where:

• \( C \) — Required septic tank capacity (liters/day)
• \( P \) — Number of persons using the system
• 150 — Standard liters per person per day in the Philippines

Explanation: This formula ensures the septic tank has sufficient capacity to handle daily wastewater generation with adequate retention time for proper treatment.

3. Importance of Proper Septic Tank Sizing

Details: Correct septic tank sizing is crucial for effective wastewater treatment, preventing system failures, avoiding environmental contamination, and complying with Philippine sanitation regulations.

4. Using the Calculator

Tips: Enter the number of persons who will regularly use the septic system. Consider future expansion when planning capacity.

5. Frequently Asked Questions (FAQ)

Q1: Why is 150 liters per person used in the Philippines?
A: This is the standard established by Philippine sanitation regulations based on average water usage and wastewater generation patterns in the country.

Q2: Should I add extra capacity for guests?
A: Yes, it's recommended to add 10-20% extra capacity for occasional guests or future household expansion.

Q3: Are there different requirements for commercial establishments?
A: Yes, commercial establishments typically require higher capacity calculations based on the specific type of business and expected usage.

Q4: How often should septic tanks be emptied?
A: Typically every 3-5 years, but this depends on usage, tank size, and proper maintenance.

Q5: What happens if a septic tank is undersized?
A: Undersized tanks can lead to frequent clogging, overflow, system failure, and potential environmental contamination.