Formula Used:
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Definition: The Treatability Constant at 30°C and 25ft depth refers to a rate coefficient indicating the effectiveness of a treatment process at the standard temperature of 30°C at 25ft filter depth.
Purpose: It helps water treatment professionals assess and compare filtration system performance under standardized conditions.
The calculator uses the formula:
Where:
Explanation: The formula adjusts the treatability constant from the reference depth to the actual depth using an empirical relationship.
Details: Accurate calculation ensures proper design of water treatment systems, predicting performance at different filter depths.
Tips: Enter the treatability constant at 20ft depth, reference filter depth (default 6.1m), actual filter depth (default 7.6m), and empirical constant (default 0.3). All values must be > 0.
Q1: Why is 30°C used as the standard temperature?
A: 30°C is a common reference temperature for water treatment processes as it represents warm conditions where biological activity is significant.
Q2: What's a typical empirical constant value?
A: The empirical constant typically ranges from 0.2 to 0.4, with 0.3 being a common default value for many filtration systems.
Q3: How do I find the treatability constant at 20ft depth?
A: This is typically determined through pilot studies or provided by filter media manufacturers based on performance testing.
Q4: Can this formula be used for other filter depths?
A: Yes, the formula can be adapted for any two filter depths as long as the empirical constant is appropriate for the system.
Q5: Does temperature affect the empirical constant?
A: The empirical constant is generally considered temperature-independent, but the treatability constant itself varies with temperature.