The amount and size distribution of particles in the effluent from a sand filter or from activated carbon filtration in a drinking water treatment plant were investigated.

结合水厂实际水处理工艺及活性炭深度处理装置，试验研究砂滤池和活性炭滤柱出水中颗粒物数量变化及粒径分布规律。

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And the Pretreatment of the effluent is essential.

乳品厂污水需要经过一定的前处理。

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Toxicity of the effluent to methanogen was analyzed.

并对其废水对产甲烷菌的毒性进行了分析。

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But two independent reports found that the effluent probably killed off weeds on which the swans feed.

ECONOMIST: Public opinion drives a shift in environmental policy

Currently some of the effluent discharged into the Irish Sea does not meet with marine protection guidelines.

BBC: Isle of Man sewage development to cost millions

On the Firth of Forth, says Northumbrian Water's Mr Spray, large populations of scaup, a diving duck, vanished after the effluent was cleaned up.

ECONOMIST: For some, sewage is pollution. For others, it's nutrition