Mixing Concentration Formula:
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Definition: This calculator estimates the concentration of pollutants or other parameters after sewage mixes with river water.
Purpose: It helps environmental engineers and water quality professionals determine the resulting concentration when two water streams with different characteristics mix.
The calculator uses the formula:
Where:
Explanation: The formula calculates a flow-weighted average concentration based on the mass flow rates of the two streams.
Details: Proper calculation helps assess environmental impact, determine compliance with water quality standards, and design appropriate wastewater treatment systems.
Tips: Enter the sewage concentration, sewage discharge rate, river concentration, and river discharge rate. All flow values must be > 0.
Q1: What parameters can this calculator be used for?
A: It can be used for any conservative parameter like total dissolved solids, chlorides, or temperature. For non-conservative parameters (like BOD), additional factors must be considered.
Q2: What units should I use?
A: The calculator uses mg/L for concentrations and m³/s for flow rates. Convert your measurements to these units before input.
Q3: What if the river discharge is much larger than sewage discharge?
A: The mixing concentration will approach the river concentration as the river flow dominates the mixture.
Q4: Does this account for incomplete mixing?
A: No, this assumes complete and instantaneous mixing. Real-world applications may require adjustment factors.
Q5: How accurate is this calculation?
A: It provides a theoretical estimate. Field measurements may vary due to mixing conditions, temperature effects, and other environmental factors.