Weight Flow Rate Formula:
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Definition: This calculator determines the weight flow rate of sludge feed based on volume flow rate, specific gravity, water density, and percent solids.
Purpose: It helps wastewater treatment professionals calculate the mass flow of sludge in treatment processes.
The calculator uses the formula:
Where:
Explanation: The formula converts volume flow to weight flow considering sludge properties and converts minutes to hours.
Details: Accurate sludge weight flow rate is crucial for proper sizing of treatment equipment and process control in wastewater treatment plants.
Tips: Enter the volume flow rate, specific gravity (default 2), water density (default 62.4 lb/ft³), and percent solids (default 45%). All values must be > 0.
Q1: What is typical specific gravity for sludge?
A: Most sludge has specific gravity between 1.0 and 2.5, with 2.0 being a common default value.
Q2: Why is water density included?
A: The calculation uses water density as a reference point since specific gravity is relative to water.
Q3: How do I measure percent solids?
A: Percent solids is typically determined through laboratory testing of sludge samples.
Q4: What's the purpose of the 60 in the formula?
A: The 60 converts minutes to hours since volume flow is per minute but weight flow is per hour.
Q5: What's the significance of 7.48 in the formula?
A: 7.48 gallons equal 1 cubic foot, which is needed for unit conversion in the calculation.