这三种最重要的营养循环包括氮循环、碳循环和我们今天要讲的磷循环。
The three most important nutrient recycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle.
循环活性污泥系统(CASS)是一种具有脱氮除磷功能的以序批曝气非曝气方式运行的充放式间隙活性污泥处理工艺。
Cyclic activated sludge System (CASS) is a batch fill and draw activated sludge process operated in sequences of aeration and non aeration which can effectively remove nitrogen and phosphorus.
循环式活性污泥法对大型城市污水处理尤其在要求深度去除氮磷时，是一种非常高效经济的工艺方法。
Cyclic Activated Sludge Technology (CAST) is a viable choice for large-scale municipal wastewater treatment, particularly when nutrient removal is of a major consideration.
循环式活性污泥法对大型城市污水处理尤其在要求深度去除氮磷时，是一种非常高效经济的工艺方法。
Cyclic Activated Sludge Technology (CAST) is a viable choice for large-scale municipal wastewater treatment, particularly when nutrient removal is of a major consideration.
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