The choice of the equipments responds to a high requirement of simplicity, reliability and maintenance.
The flow of the water produced by this unit depends on the quality of the crude water (mostly turbidity ). It can vary between 1 and 1,2 m3/h of drinking water.
The operation of this unit is as follows :
■ feeding of raw water by an automatic pump from a tank of raw water, a retaining tank or directly from a river after clarification. This pump is also used to wash the sand filter with treated water coming from the storage tank.
■ pre filtration with a manual filter.
■ sand filtration with manual air and water washing.
■ automatic disinfection by injection of bleach thanks to a volumetric.
■ the water can be stored in the upper tank or directly distributed after counting.
■ the treated water can be put in bag, after a further sterilization with an UV generator.
Other versions of this unit can treat brackish water (less than 5 grams per litre of salt) or seawater, after appropriate treatment by reverse osmosis. Then, it is also possible to add an ice production unit.