1
Jean Marie Rovel, Claude Prevot, Roger Nicol: Process and apparatus for the anaerobic treatment of waste water in a filter including granular material. Degremont, Wenderoth Lind & Ponack, November 13, 1984: US04482458 (55 worldwide citation)

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 conti ...


2
Jacques Bernard, Jean Marie Rovel, Roger Nicol, Claude Prevot: Apparatus for the anaerobic filtration of waste water. Degremont, Wenderoth Lind & Ponack, December 31, 1985: US04561974 (28 worldwide citation)

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. T ...


3
Jean Marie Rovel: Process for the biological purification of effluent. Degremont, Pollock Vande Sande & Priddy, September 20, 1994: US05348653 (28 worldwide citation)

Process for the biological purification of effluent which makes it possible either to ensure complete treatment of the carbon pollution and the nitrogen pollution at the nominal output, or to remove the biological oxygen demand or BOD only during a substantial increase in the nominal output, especia ...


4
Jacques Bernard, Jean Marie Rovel: Fluidized bed reactor with means for ensuring homogeneous distribution of the fluid to be treated. Degremont, Wenderoth Lind & Ponack, September 26, 1989: US04869815 (20 worldwide citation)

A fluidized bed reactor for the biological treatment of a fluid includes granular treating material through which the fluid to be treated passes upwardly, thereby fluidizing the treating material, during which biological treatment is achieved. A homogeneous distribution of the fluid into the bottom ...


5
Andreas Strohmeier, Ingulf Schroeter, Jean Marie Rovel: Method for sewage treatment. Philipp Muller, Jones Tullar & Cooper P C, August 25, 1998: US05798044 (14 worldwide citation)

Described is a two-stage sewage treatment plant (10), in particular for domestic sewage, wherein the first biological purification stage (12) is dimensioned so that besides the carbon load, the mean nitrogen load is maximally degraded. Any peak loads that may appear are degraded in the second biolog ...


6
Roger Ben Aim, Daniel Bourdiol, Francois Fiessinger, Jean Marie Rovel: Tangential filtration apparatus and plant comprising such apparatus. Societe Lyonnaise des Eaux et de l Eclairage, Degremont, Institut de la Filtration et des Techniques Separatives Foulayronnes, Wenderoth Lind & Ponack, February 11, 1986: US04569759 (12 worldwide citation)

A filtration apparatus includes at least one tangential filtration module ving at least one filtration element defining a conduit arranged in a spiral configuration within an enclosure in the form of a body of revolution. The element defines a helicoidal slope for liquid to be filtered and causes su ...


7
Christian Barraque, Jean Burriat, Jean Marie Rovel: Process and apparatus for treating by ion exchange or adsorption fluids having solid particles suspended therein. Degremont, Wenderoth Lind & Ponack, May 26, 1981: US04269715 (4 worldwide citation)

A treatment column includes a treatment zone which is completely filled with a bed of granular treatment material. A normal treatment operation includes passing a fluid to be treated in a downward direction through the bed of treatment material, thereby treating the fluid. Solid particles suspended ...


8
Jean Burriat, Bernard Causse, Jean Marie Rovel: Method for the treatment of liquids on granular materials. Degremont, Wenderoth Lind & Ponack, April 21, 1987: US04659476 (2 worldwide citation)

A method for the treatment of liquids containing particles in suspension, by percolation of the liquid from top to bottom through a bed of granular material, notably of a ion exchanger resin, includes treatment cycles of the liquid and regeneration cycles of the resin, preceded by decompaction and w ...


9
Jean Marie Rovel, Claude Prevot, Claude Delporte: Process for the treatment of urban or industrial residual sludge by aerobic digestion. Degremont, May 12, 1995: FR2711980-A1 (2 worldwide citation)

Process for the treatment of urban or industrial residual sludge by anaerobic digestion, characterised in that it is performed in two steps in two different reactors: the first step forming a thermophilic anaerobic digestion carried out at a temperature of the order of 50 to 60 DEG C and a residence ...



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