Analysis of existent catalytic filter materials for removal of iron and manganese

Decentralized water supply in war and post-war times is one of the main sources of water for the population and enterprises. As a source of water supply, as a rule, water from wells is used for this type of water supply. The main problems of drill-fish water are the increased content of iron, manganese, hydrogen sulfide, hardness salts, nitrates, sulfates, chlorides in some regions, high dry residue. The rapid development of technologies based on membrane technologies such as reverse osmosis or nanofiltration allow us to adjust the salt composition of water, remove nitrates and make water suitable for drinking needs and production cycles. But before membrane technologies, compounds of iron, manganese, and hydrogen sulfide, which can form inorganic impurities on the surface of membrane elements and cause their premature failure, must be removed. One of the best methods of pre-treatment of water before membrane systems is complex ion-exchange materials, which are simultaneously capable of removing hardness salts, iron, and manganese. But the main disadvantage of such pre-filtration methods is the use of tableted salt, which makes this method expensive and not environmentally friendly. Purification of water from iron and manganese on pressure filters by catalytic loading with subsequent dosing of antiscalant before membrane installations is a modern trend in local water treatment. Catalytic loadings have been used for quite a long time, but most manufacturers do not provide clear and practical recommendations for their use. The use of such materials, as a rule, largely depends on many factors and is based on the experience of the specialist's qualifications. Analysis of the technical parameters of filter materials, analysis of parameters of the source water quality are the main components of the selection and organization of the correct technological scheme of water purification.