颗粒活性炭-石英砂双层滤料组合要优于石英砂单层滤料和无烟煤-石英砂双层滤料，加氯水反冲洗不利于生物滤池的运行。
The granule active carbon (GAC) -sand media is superior to sand media and anthracite-sand media, and the backwashing water with residual chlorine will do harm to the operation of the biofiltration.
颗粒活性炭-石英砂双层滤料组合要优于石英砂单层滤料和无烟煤-石英砂双层滤料，加氯水反冲洗不利于生物滤池的运行。
The granule active carbon (GAC) -sand media is superior to sand media and anthracite-sand media, and the backwashing water with residual chlorine will do harm to the operation of the biofiltration.
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