求翻译：此外，现在使用的重力冲水厕所造成大量优质水与其他生活污水一起混合排放，使得粪便中所含氮、磷、钾等被稀释而无法回收利用。同时，生活污水中的氮、磷必须通过深度处理才能去除，造成污水处理费用高昂。是什么意思？

In addition, the use of gravity flush toilets are now causing a large number of high-quality water mixed with sewage and other emissions, making the manure in the nitrogen, phosphorus, potassium, diluted and can not be recycled. Meanwhile, the sewage nitrogen and phosphorus must be removed by the de

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正在翻译，请等待...

In addition, now uses gravity to flush the toilet caused a large number of high quality water mixed with other domestic sewage discharge, feces containing nitrogen, phosphorus and potassium are dilute and cannot be recycled. At the same time, nitrogen and phosphorus in the sewage must be removed thr

In addition, now uses gravity to flush the toilet caused a large number of high quality water mixed with other domestic sewage discharge, feces containing nitrogen, phosphorus and potassium are dilute and cannot be recycled. At the same time, nitrogen and phosphorus in the sewage must be removed thr