The experimental results show that PC process, which is characterized with high hydraulic load, good effluent quality, and high sludge concentration, can be well used to treat waterworks wastewater.

研究结果表明，用结团凝聚技术处理水厂生产废水是完全可行的，且具有处理效率高、出水水质好、排泥浓度高等特点。

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Two methods determining the sludge volume index under diluting sludge concentration and practical sludge concentration are analysed and compared.

同时，对在稀释浓度和实际浓度条件下测定污泥指数的两种方法进行了分析比较。

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The effects of differential speed and the concentration of sludge on the solid content of cake as well as the effect of flocculant dosage on the recovery yield of solid have been discussed.

介绍了卧螺离心机的主要特点以及在低浓度市政污泥脱水中的应用，探讨了差转速、污泥浓度对泥饼含固率，絮凝剂用量对固相回收率的影响。

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In his study, Rickard found that the amount of metal in the sludge depended on the concentration in the clothing - and this varied hugely.

BBC: Smelly socks raise silver stink

It said the detected arsenic concentration was twice the amount normally found in sludge.

BBC: Hungary sludge death toll rises after two bodies found