TREATMENT CFS

Source
Iron and manganese often cause the main problem of the waterworks' due to the substances' discoloring of the washing and sanitation at the consumer. Typical signs of increased iron and manganese content in the water are ochreous or black water with a metallic taste.
Raw water can contain different types of iron dependent on where in the country you are. Sand filtration is thus not always sufficient. It may therefore be necessary to use other methods in order to ensure continuous iron-free water. These differences cannot be seen in the ordinary analyses but calls for know-how and experience to determine iron type and treatment method.

Solution
After the oxydation, iron and manganese can be filtered through sand filtration.