A model based on activated sludge wastewater treatment systems was presented. The objective was to optimize energy consumption and improve effluent quality.

提出了基于活性污泥处理系统的模型，目的是优化能量消耗和提高废水排出质量。

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Her unique solution is not to get rid of wastewater and fecal sludge, but to value them.

她独特的解决办法不是排除废水，清理粪便和污泥，而是把这些东西重视起来。

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Other scientists have looked at materials like leaf compost or manure, while Professor Brown favors composts high in iron content, like the sludge from wastewater treatment.

其他科学家们寄希望于树叶堆肥或粪肥一类的物质，而布朗教授更偏爱铁含量较高的堆肥，例如来自废水处理过程中的污泥。

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Well, we generate about 8 million tons of sludge annually (this accounts for 30-80 % total electricity in wastewater treatment).

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In October 2000 the floor of a 72-acre wastewater reservoir built above an abandoned mine in Kentucky collapsed, sending black sludge through the mine and out into a tributary of the Big Sandy River.

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Researchers say this could eventually change the way that wastewater is treated all over the world, replacing the widely used "activated sludge" process that has been in use for almost a century.

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