04561974 is referenced by 28 patents and cites 6 patents.

An apparatus for the anaerobic filtration of waste water includes a filter of filling material through which the waste water to be treated is passed from the bottom to the top. The filter includes upper and lower superposed layers of filling material separated by an intermediate layer of material. The lower layer is in the form of an ordered arrangement of the material thereof. The upper and intermediate layers each include a loosely packed arrangement of the material thereof.

Title
Apparatus for the anaerobic filtration of waste water
Application Number
6/576408
Publication Number
4561974
Application Date
February 2, 1984
Publication Date
December 31, 1985
Inventor
Claude Prevot
Ville d'Avray
FR
Roger Nicol
Issy Les Moulineaux
FR
Jean Marie Rovel
Rueil Malmaison
FR
Jacques Bernard
Saint German en Laye
FR
Agent
Wenderoth Lind & Ponack
Assignee
Degremont
FR
IPC
C12M 1/18
C02F 3/28
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