1. What is Sludge Feed Rate Calculator?

Definition: This calculator determines the sludge feed rate based on the dewatered sludge discharge rate and solid recovery percentage.

Purpose: It helps wastewater treatment professionals estimate the required feed rate for sludge processing systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Sf \) — Sludge Feed Rate (kg/s)
• \( Cd \) — Cake Discharge Rate (kg/s)
• \( R \) — Solid Recovery (decimal)

Explanation: The cake discharge rate is divided by the solid recovery percentage (in decimal form) to determine the required sludge feed rate.

3. Importance of Sludge Feed Rate Calculation

Details: Accurate sludge feed rate calculation ensures proper operation of dewatering equipment, optimal polymer usage, and efficient solids capture.

4. Using the Calculator

Tips: Enter the cake discharge rate in kg/s and solid recovery as a decimal (e.g., 60% = 0.6). Solid recovery must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is typical solid recovery for sludge dewatering?
A: Most systems achieve 60-95% recovery (0.6-0.95 decimal), depending on equipment and sludge characteristics.

Q2: How do I measure cake discharge rate?
A: Weigh the dewatered cake produced over a known time period and calculate kg/s.

Q3: Why use decimal for recovery percentage?
A: Decimal form (0-1) simplifies calculations compared to percentage (0-100).

Q4: What affects solid recovery rate?
A: Factors include sludge type, dewatering method, polymer dosage, and equipment condition.

Q5: Can this calculator be used for different dewatering systems?
A: Yes, it works for centrifuges, belt presses, and filter presses, though recovery rates vary.