清水池内浊度容易升高，这可能与滤池初滤水的水质较差有关。
The turbidity level may increase in clear water tank, probably because of the high turbidity level of the filtrate after backwashing.
排放初滤水，对反冲洗水进行混凝沉淀预处理后再回收，能提高滤后水的微生物学安全性。
The microbiological safety of filtered water can be improved by discharging initial filtered water and recovering backwash water after coagulation and sedimentation pretreatment.
滤料的初阻力决定于滤料本身的透气度，而运行中的阻力则比初阻力大许多倍。
The initial resistance of the filter medium decides the air permeability of the filter medium itself, but the resistance during operating is several times to the initial resistance.
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