Seawater Chlorine demand generally varies on a seasonal basis. Over an extensive preceding period the local seawater conditions and chlorine demand would have been monitored to determine the required Chlorine dosage required for the residence period of the seawater in the treated system.
There will be environmental limits as to the free chlorine residual permissible to be discharged back to sea therefore the maximum chlorine seasonal demand plus the permissible residual will typically determine the maximum dosing regimes for a given system.
With the dosing regimes determined and a known seawater process flow the maximum chlorine demand productivity can be calculated to a weight per unit time, typically kg/h.
