Patent ID: 11377369

Abstract:
The invention provides a water filtration system for removing heavy metals, residual chlorine, estrogens, bacteria and dust from tap water. The system includes a first adsorbent stage cartridge including approximately 40-65 wt. % of silver-impregnated activated carbon, approximately 1-10 wt. % of activated alumina, approximately 15-35 wt. % of ceramic balls, approximately 0.5-1 wt. % of chitosan and approximately 0.5-1 wt. % of kinetic degradation fluxion media. The second filtration stage cartridge includes an antifouling electrospun nanofiber membrane. A flow path is provided between the first adsorbent stage cartridge and the second filtration stage cartridge. The multiple stage water filtration system is capable of filtering water at a volume rate of at least approximately 2 liters per minute. In one embodiment, the nanofibers may be polyvinylidene fluoride doped with polyacrylonitrile and including bacteria-repellent methoxy polyethylene glycol side chains such that the nanofiber membrane has a water contact angle of approximately 55 degrees or less.