| 摘要 |
A gravity fed, pour-through water filtration device (10) includes a chamber housing (11), a spiral filter (30, 80) including a biocidal material and an annular holding chamber. Several porous separator disks, a volume of filtration media (64), and a cyst membrane (70) are positioned beneath the spiral filter and holding chamber. The device (10) is effective in significantly reducing the number of bacteria, viruses and cysts present in the filtrated water. The filtration device is a fully scaleable design for use in municipal flow-through and other systems. The configuration of the flow path may be a thin channel of minimal width lined with granular active material to improve the efficiency of the filtration and treatment process while keeping to a minimum the resistance to flow. The spiral or helical geometry lends itself to compact arrangement where space is limited. The fluid channel lined with granular material disrupts laminar flow and creates an environment inhospitable for the growth of bacterial contaminants such as biofilm typically found and described in dental water treatment lines.
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