單項選擇題

In order to culture and propagate enough bacteria to treat the body and galley wastes（）

A.a new bacteria colony should be put into the plant in advance
B.the disinfection chemicals should be always used
C.the air blower should be started and keep running in advance
D.the nutrient for bacteria should put into plant in advance

你可能感興趣的試題

單項選擇題

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

A.anaerobic bacteria
B.aerobic bacteria
C.air bubbles
D.disinfection chemicals

單項選擇題

The extended aeration process consists of （） the liquor either by bubbling air through it or by agitating the surface.

A.deoxygenating
B.oxygenating
C.chemicalizing
D.disinfecting

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In order to culture and propagate enough bacteria to treat the body and galley wastes（）

你可能感興趣的試題

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

The extended aeration process consists of （） the liquor either by bubbling air through it or by agitating the surface.