Gravity filter water treatment

To achieve the above purposes, the gravity filter water treatment provides a siphon-type composite UF filtration component module as shown in Figure 1, including the millimeter-level (1) outer screen type protective housing and (4) inner grid-type membrane support cage, the micron-level (2) microfiltration layer and (3)activated carbon fiber adsorption layer and the nano level (5) ultrafiltration layer. From outside to inside, each layer’s filtration nominal pore size is smaller. The microfiltration layer and the ultrafiltration layer are ultra-hydrophilic materials, the ultrafiltration membrane is a gradient sponge aperture structure with an internal aperture size larger than the outer aperture size, the mesh screen outer protective layer, the microfiltration layer, the carbon fiber adsorption layer, the mesh gate inner support layer and the ultrafiltration layer are closely integrated into a tube-like structure with siphon pressure difference. The end of the tubular structure is equipped with a water outlet port that only provides water from the ultrafiltration layer.