Hypochlorite dosing

Calculate hypochlorite solution dose from water flow and target concentration and propose dosing pump settings.

Hypochlorite dosing

This calculator determines the required hypochlorite solution flow from water flow and target free chlorine concentration. It also proposes dosing pump settings for continuous and flow-proportional dosing.

Input data – hypochlorite solution

Active chlorine mass fraction in solution [%]

Hypochlorite solution density [kg/L]

Dilution factor [×]

Water flow [L/s]

Target active chlorine concentration in water [mg/L]

Results

Active chlorine concentration in stock solution [g/L]

144.00

Active chlorine concentration in diluted solution [g/L]

144.00

Required mass of active chlorine [g/h]

0.36

Required hypochlorite solution volume [mL/h]

2.50

Required hypochlorite solution volume [L/d]

0.06

Required mass of active chlorine [g/d]

8.64

Pump settings – continuous dosing

Rated dosing pump capacity [L/h]

Pump stroke setting [%]

Maximum pump frequency [strokes/min]

Required fraction of maximum pump frequency at chosen stroke [%]

0.52

Set pump frequency [strokes/min]

1.25

Pump settings – flow-proportional dosing

Litres of water per pulse [L/pulse]

Pulses at design flow [pulses/min]

6.00

Pulses at design flow [pulses/h]

360.0

Required solution volume per stroke [mL/stroke]

0.01

Required pump stroke for flow-proportional dosing [%]

6.25

stroke setting too low

This calculation is indicative and does not cover all practical details (dead volumes, ramp-up times, pump manufacturer’s limitations). Always refer to the documentation of the specific equipment for final design.

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