NOVELTY - Algae growth inhibition of sewage treatment water involves flowing sewage treatment water where purified with sewage and organic matter concentration is reduced to biologic reactor (2) which accommodates microorganism retention carrier (S) that carry microorganisms, making spontaneous target carry trace amount metal oxide microorganisms, oxidizing and insolubilizing trace amount metal contained by trace amount metal oxide microorganisms in sewage treatment water, and removing oxide of trace amount metal from treated water after biologic reactor passage.    USE - Algae growth inhibition of sewage treatment water.    ADVANTAGE - The method prevents scene damage by mass generation of adhesion algae and floating algae, and has inexpensive installation costs and operating costs.    DETAILED DESCRIPTION - Algae growth inhibition of sewage treatment water involves flowing sewage treatment water where purified with sewage and organic matter concentration is reduced to biologic reactor (2) which accommodates microorganism retention carrier (S) that carry microorganisms, making spontaneous target carry trace amount metal oxide microorganisms which oxidize trace amount metal required for proliferation of algae on surface of microorganism retention carrier by continuing fed and carrying out aeration of air from lower part, trace amount metal oxide process which oxidizes and insolubilizes trace amount metal contained by trace amount metal oxide microorganisms in sewage treatment water, and trace amount metal oxide removal process which removes oxide of trace amount metal from treated water after biologic reactor passage. An INDEPENDENT CLAIM is included for an algae growth inhibition apparatus of sewage treatment water.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the algae growth inhibition of sewage treatment water. (Drawing includes non-English language text).    Sewage treatment equipment (1)    Biologic reactor (2)    Suspended solid removal apparatus (3)    Microorganism retention carrier (S)