| 摘要 |
1497130 Support medium for biological treatment NYLEX CORP Ltd 27 Nov 1975 [28 Nov 1974] 48846/75 Heading C1C A support medium when used for the biological treatment of sewage or other aqueous effluent comprises a plurality of superposed sheets of a mesh-like material, the meshes of any one of said sheets being placed randomly with respect to the meshes of an adjacent sheet. The sheets may be disposed to avoid superposition of the apertures of adjacent sheets. The mesh-like material may be of plastics or foamed plastics, e.g. a polyethylene foamed to a s.g. of about 0À3 g.cm<SP>-1</SP>. |
