**COAGULATION AND FLOCCULATION CALCULATIONS**

Calculations are performed during operation of the coagulation and flocculation unit processes to determine chamber or basin volume, chemical feed calibration, chemical feeder settings, and detention time. **CHAMBER AND BASIN VOLUME CALCULATIONS**

To determine the volume of a square or rectangular chamber or basin, we use:

Volume (cu ft) = length (ft) x width (ft) x depth (ft)

Volume (gal) = length (ft) x width (ft) x depth (ft) x 7.48 gal/cu ft

Example 16.1

Problem

A flash mix chamber is 4 ft square with water to a depth of 3 ft. What is the volume of water (in gallons) in the chamber?

Solution

Referring to Equation

Volume (gal) = 4 ft x 4 ft x 3 ft x 7.48 gal/cu ft

= 359 gal

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