Howerver, due to the low automation and high energy cost in the wastewater treatment processes, most wastewater treatment plants are running with low efficiency but high cost.

然而由于我国污水处理的自动化程度较低，导致我国大部分污水处理工程运行效率低下、运营成本过高。

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The Coke Plant had many packing concrete cooling towers, with low running efficiency and high running cost because of many years of use, which severely restrained the saving of economic cost.

焦化厂现有多台填料混凝土冷却塔已投用多年，运行效率低下，运行成本高，已严重制约经济成本的节约。

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Running proved that the mechanism can adapt the large scale lime preparation technology, can speed up the efficiency of the separating machine and can reduce the cost of manufacturing.

运行证明，该机构能适应大规模的石灰制备工艺，提高了分离机的工作效率，降低了制造成本。

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