The function of the membrane filter is to act as a physical barrier that removes solids, viruses, bacteria, and other unwanted molecules. Specialized types are designed for softening, disinfecting, organic removal processing, and water desalination. The filters are often installed in compact, automated, or modular units. These strainers are used as separators between stacked discs in a very single filter holder during serial filtration. Membrane filters are virtually non reactive to chemical and biological agents, ensuring stability when filtering concentrated acids, alkalis, or oxidizers.