Sludge Feed Rate Formula:
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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.
The calculator uses the formula:
Where:
Explanation: The cake discharge rate is divided by the solid recovery percentage (in decimal form) to determine the required sludge feed rate.
Details: Accurate sludge feed rate calculation ensures proper operation of dewatering equipment, optimal polymer usage, and efficient solids capture.
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.
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.