Dosage Formula:
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Definition: This calculator determines the dosage of chlorine needed for water treatment based on the chlorine requirement and average flow rate.
Purpose: It helps water treatment professionals calculate the appropriate chlorine dosage to achieve effective disinfection while maintaining water safety standards.
The calculator uses the formula:
Where:
Explanation: The formula calculates the chlorine dosage needed per unit volume of water to achieve the desired disinfection level.
Details: Proper chlorine dosage ensures effective pathogen reduction while preventing over-chlorination which can create harmful disinfection byproducts.
Tips: Enter the chlorine requirement in kg/s and the average flow rate in m³/s. Both values must be greater than 0.
Q1: Why is 8.34 used in the formula?
A: 8.34 is the conversion factor between pounds per gallon and kilograms per cubic meter (lb/gal to kg/m³).
Q2: How do I determine chlorine requirement?
A: Chlorine requirement is typically based on water quality tests and regulatory requirements for pathogen reduction.
Q3: What's a typical chlorine dosage?
A: Typical dosages range from 1-5 mg/L (0.001-0.005 kg/m³) for drinking water, but can vary based on water quality.
Q4: How does flow rate affect dosage?
A: Higher flow rates require more total chlorine but the dosage (concentration) may remain similar if chlorine demand is proportional.
Q5: Should I adjust for contact time?
A: This calculator provides the dosage. Contact time (CT value) should be considered separately for complete disinfection planning.