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[单选题]
脱水是将污泥的含水率降低到()以下的操作.
A.95%~96%
B.80%~85%
C.50%~65%
D.10%
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A.95%~96%
B.80%~85%
C.50%~65%
D.10%
A.剩余污泥有机物含量与工艺类型无关,受运行参数影响较大
B.城市污水处理厂初次沉淀池的污泥量取决于进水水质和初沉池的运行效果
C.剩余污泥的pH值一般大于8.0
D.对城市污水处理厂产生的污泥,含水率从99%降低到98%,污泥的体积减少了 1/4