A process for the treatment of waste water flowing in a sewer and drain (not shown) for executing this method

摘要

The invention provides a method of, and apparatus for, treating sewage flowing through a sewer, wherein an oxygenating gas is introduced under pressure into the sewage and is dissolved therein and the thus oxygenated sewage is contact with a matrix of solid material carrying micro-organisms effective to reduce the Biochemical Oxygen Demand of the sewage, the matrix extending across a region inside the sewer. The treatment may be performed in a gravity sewer or in a rising or pumping sewer.