有一座平流式沉淀池,水深 3.5 m ,长 70 m ,设计水平流速 12 mm/s 。当进水悬浮物浓度含量 20 mg/L 时,水质分析资料见下表,按照理想沉淀池计算,沉淀池出水悬浮物含量( mg/L )是哪一个选项。
A.
9.0
B.
7.6
C.
5.0
D.
4.0
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