A.對有機(jī)氮和氨氮 B.有機(jī)氮和凱式氮 C.有機(jī)氮和無機(jī)氮 D.凱式氮和無機(jī)氮
A.大規(guī)模 B.中小規(guī)模 C.中大規(guī)模 D.各種規(guī)模
A.曝氣裝置、盤片 B.盤片、接觸反應(yīng)槽、轉(zhuǎn)軸 C.接觸反應(yīng)槽、曝氣裝置、轉(zhuǎn)軸 D.轉(zhuǎn)軸、曝氣裝置