A Hollow Fiber Membrane Filter is a type of filtration technology that uses hollow fibers to remove impurities and contaminants from a fluid. The filter consists of a bundle of small, hollow fibers that are made from a porous membrane material. Fluid is passed through the fibers, and the impurities are trapped on the surface or within the fibers, depending on the size of the particles. Hollow fiber membrane filters are commonly used in water treatment applications to remove bacteria, viruses, and other microorganisms from drinking water.