单项选择题
A.in the presence of oxygen B.without oxygen C.in the presence of nutrition D.without nutrition
It is that reduce the BOD by converting the organic con...
单项选择题It is that reduce the BOD by converting the organic content of the sewage to a chemically and organically inert sludge（）
A.the bacteria B.oxygen C.oxidizing function D.agitation function
The basic process of biological sewage treatment consis...
单项选择题The basic process of biological sewage treatment consists of the liquor either by bubbling air through it or by agitating the surface（）
A.oxygenating B.oxidizing C.deoxygenating D.proportioning
When the garbage is mixed with some discharges having d...
单项选择题When the garbage is mixed with some discharges having different disposal or discharge requirements, shall apply（）
A.any requirement appointed by the Officer B.the most suitable requirement C.the most stringent requirement D.no requirement
