... primary secondary system 一次及二次系统 primary sedimentation 一次沉淀 primary sludge 生污泥 ...
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;初级沉淀池（ Primary Sedimentation Tank） 污水继而进入初级沉淀池，大约50%悬浮固体废物会在此沉淀成为初级污泥（Primary Sudge）。
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primary sedimentation tank 初次沉淀池 ; 初沉池
sludge from primary sedimentation tank 初沉污泥
primary sedimentation pond 初次沉淀池
primary sedimentation pool 初沉池
primary sedimentation basin 一次沉淀池
enhanced primary sedimentation 强化一级处理
It is important to select the type of primary sedimentation tank in the design of large wastewater treatment plants.
大型污水处理厂中初次沉淀池池型选择是重要的。
Next up is the primary sedimentation tank, where sludge settles to the bottom and lighter liquids like grease, oil and soap rise to the top.
下一步就是一级沉淀池，污泥沉淀到底部，轻质液体例如油脂、油和皂类浮到上面。
The experimental results indicated as well that canceling primary sedimentation tank and cesspool when building houses would avail to stable running of sewage treatment plant.
试验结果表明：在污水处理厂取消初沉池，及修建住宅时取消化粪池，对污水处理厂的稳定运行有益。
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