Quantity of Sewage Produced Per Day given Sanitary Sewer System Flow Rate Calculator

Discharge Formula:

\[ Q = \frac{SS_{fr}}{A \times P_d} \]

Sanitary System Sewer Flow Rate:

m³/s

Cross Sectional Area:

m²

Population Density:

hundred/m²

Tolerance:

Discharge (m³/s):

1. What is Quantity of Sewage Produced Per Day?

Definition: This calculator estimates the discharge of wastewater based on sanitary sewer flow rate, cross-sectional area, and population density.

Purpose: It helps civil engineers and urban planners determine sewage production rates for proper sewer system design.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = \frac{SS_{fr}}{A \times P_d} \]

Where:

\( Q \) — Discharge (m³/s)
\( SS_{fr} \) — Sanitary System Sewer Flow Rate (m³/s)
\( A \) — Cross Sectional Area (m²)
\( P_d \) — Population Density (hundred/m²)

Explanation: The sewer flow rate is divided by the product of cross-sectional area and population density to determine discharge.

3. Importance of Sewage Quantity Calculation

Details: Accurate sewage quantity estimation ensures proper sewer system capacity planning, prevents overflows, and maintains public health standards.

4. Using the Calculator

Tips: Enter the sewer flow rate in m³/s, cross-sectional area in m², population density in hundred/m², and tolerance percentage. All values except tolerance must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the tolerance percentage for?
A: The tolerance allows for ±5% adjustment to account for measurement uncertainties or safety factors in design.

Q2: How do I determine the cross-sectional area?
A: For circular pipes, use \( πr² \). For rectangular channels, use width × height.

Q3: What's a typical population density value?
A: Urban areas might range 0.0005-0.002 hundred/m² (50-200 people/km²), but this varies widely.

Q4: How is sewer flow rate measured?
A: It's typically measured at treatment plant inlets using flow meters or estimated from water consumption data.

Q5: Does this include stormwater runoff?
A: No, this calculates only sanitary sewage. Combined systems would require additional calculations.