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水処理 毎日一問(11.18)

2016-11-18View Original

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単一選択問題(計2問) 1、凝集沈殿過程において、一定の粒子については、水深が異なると沈殿効率も異なり、水深が深くなるほど沈殿効率も高くなる。水深が2倍になると、沈殿時間は( )。 A.1倍に増加する B.1倍に増加する必要はない C.10倍に増加する D.1倍に減少する 2、( )主に粒子同士の密集と自動的な圧縮によって、汚水中の懸濁固体濃度がさらに上昇する。 A.凝集沈殿 B.自由沈殿 C.集合沈殿 D.圧縮沈殿 B;D

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