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滤池是地表水厂中不可缺少的净化构筑物,其过滤过程是指以石英砂等粒状滤料层截留水中悬浮杂质,从而使水获得澄清的工艺过程,它通常置于沉淀池或澄清池之后。过滤的功效,不仅在于进一步降低水的浊度,而且水中有机物、细菌乃至病毒等将随浊度的降低而被去除。残留于滤后水中的细菌、病毒等在失去浑浊物的保护或依附时,在滤后消毒过程中也将容易被杀灭,这就为滤后消毒创造了良好条件。因此,在生活饮用水的净化工艺中,有时沉淀池或澄清池可以省略,但滤池是不可缺少的,它是保证生活饮用水卫生安全的重要措施。
The filter tank is an indispensable purification structure in the surface water plant. The filtration process refers to the process of trapping suspended impurities in water with a granular filter layer such as quartz sand, so that the water can be clarified. It is usually placed after the sedimentation tank or the clarification tank. . The efficacy of filtration is not only to further reduce the turbidity of the water, but also the removal of organic matter, bacteria and even viruses in the water as the turbidity decreases. Bacteria and viruses that remain in the filtered water will also be easily killed in the process of post-filtration sterilization when they lose the protection or attachment of turbid substances. This creates favorable conditions for post-filtration sterilization. Therefore, in the purification process of drinking water, sometimes the sedimentation tank or the clarification tank may be omitted, but the filter tank is indispensable, it is an important measure to ensure the health and safety of drinking water.