It is that reduce the BOD by converting the organic content of the sewage to a chemically and organically inert sludge（）

A.oxygenating
B.oxidizing
C.deoxygenating
D.proportioning

A.any requirement appointed by the Officer
B.the most suitable requirement
C.the most stringent requirement
D.no requirement

A.plastics
B.comminuted or ground papers, rags, glass, metal etc
C.food waste comminuted or ground
D.Incinerator ash