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【单选题】
Using the biodisk as the main biological processes, wastewater treatment requires four biodisks, their functions are ______.采用生物转盘为主体工艺，对城市污水进行深度处理，需要4个生物转盘，各自的功能为______。
A.
phosphorus removal, nitrification, and denitrification除磷、硝化、反硝化
B.
nitrification, denitrification and phosphorus removal硝化、反硝化、除磷
C.
organic matter removal, nitrification, denitrification, phosphorus removal去除有机物、硝化、反硝化、除磷
D.
organic matter removal, nitrification, denitrification, advanced treatment去除有机物、硝化、反硝化、深度处理
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参考解析：
刷刷题刷刷变学霸
举一反三