仙人掌通过让沉淀物和细菌聚集成小的絮状物从而在15分钟内去除了98%的细菌，这些絮状物可以很容易地过滤掉。
The cactus removed 98 per cent of bacteria within 15 minutes by clumping sediment and bacteria into small 'flocs' - clumps of particles floating in water - that could easily be filtered out.
污泥回流对平流式沉淀池去除率的影响分析。
Analysis of Effect of Sludge Recirculation on Setting Efficiency in Horizontal Sedimentation Tank.
铅去除的机理为吸附和沉淀。
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