In a surface-aerated system, the aerators provide two functions : they transfer air into the basins required by the biological oxidation reactions, and they provide the mixing required for dispersing the air and for contacting the reactants ( that is, oxygen, wastewater and microbes ).
12.
In 1965, the specialist sections were renamed, becoming " Biophysics including Photosynthesis ", " Nucleic Acids and Protein Synthesis ", " Enzymology and Biological Oxidation ", " Lipids and Lipid Metabolism " and " Mucoproteins and Mucopolysaccharides " ( ceased in 1965 ).