04482458 is referenced by 56 patents and cites 14 patents.

Waste water to be treated is introduced into a filter including granular material for supporting the biomass resulting from an anaerobic treatment operation. During such treatment operation biogas is formed, and the waste water being treated and the granular material supporting the biomass are continuously circulated by injecting a portion of the biogas into a tube extending vertically upwardly through the filter.

Title
Process and apparatus for the anaerobic treatment of waste water in a filter including granular material
Application Number
6/534621
Publication Number
4482458
Application Date
September 22, 1983
Publication Date
November 13, 1984
Inventor
Roger Nicol
Vanves
FR
Claude Prevot
Ville D'Avray
FR
Jean Marie Rovel
Rueil-Malmaison
FR
Agent
Wenderoth Lind & Ponack
Assignee
Degremont
FR
IPC
C12M 1/08
C02F 3/28
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