A horizontal reactor equipped with a front cover and including a circular cylindrical rotating cage having multiple openings and rotated about a horizontal axis by a motor, a single horizontal rotary shaft mechanically connecting the rotating cage to the motor and extending towards the outside from the distal face of the housing, at least one bearing provided around the rotary shaft to hold it and guide it, and to support the weight of the rotating cage in cantilever, at least one removable basket having multiple openings and intended to be able to be introduced inside the rotating cage and to be removed through an open circular face of the rotating cage provided opposite the cover.

Provided is a method for recycling a water-absorbing resin which contains absorbed liquid, with consideration for a resource aspect and an energy aspect. The method for recycling a water-absorbing resin which contains absorbed liquid includes: discharging the absorbed liquid from the water-absorbing resin which contains the absorbed liquid; and recovering a water-absorbing power of the water-absorbing resin.

A method of carbon and nitrogen sequestration includes excavating a ditch around a plot of land selected for use in carbon and nitrogen sequestration. Pumping out water filling the ditch from the ground water table. When material in the plot is dry, excavating material from the plot to a desired depth, and thereafter filling the excavated plot with organic material to sequester carbon and nitrogen in the organic material therein.

A method of carbon and nitrogen sequestration includes excavating a ditch around a plot of land selected for use in carbon and nitrogen sequestration. Pumping out water filling the ditch from the ground water table. When material in the plot is dry, excavating material from the plot to a desired depth, and thereafter filling the excavated plot with organic material to sequester carbon and nitrogen in the organic material therein.

The invention relates to a method and a plant for treating or regenerating spent bleaching sands/earths from a plant for the production of biofuel, in particular from the bleaching pre-treatment of feedstocks of plant origin that are used for the production of biofuels.

The method comprises a first pre-treatment step in which the bleaching earths mixed with neutral water or with gummy acid water are neutralised by adding a base, preferably calcium hydroxide, in order to bring the pH to neutrality.

Subsequently the neutralised bleaching earths are subjected to anaerobic digestion by a biomass comprising anaerobic bacteria. During the digestion biogas, which may optionally be subjected to purification, and a solid/liquid suspension are generated.

The solid/liquid suspension is subsequently separated into a solid component comprising the bleaching earths and a liquid component comprising the digestate.

The bleaching earths are then subjected to heat treatment, at a temperature between 400 C. and 600 C.

Then follows a reactivation of the heat-treated bleaching earths with the aid of an acid solution and drying of the regenerated earths to render them usable in a plant for the production of biofuels.

A method for recycling anode and/or cathode catalyst from the catalyst coated membranes comprising proton exchange membrane, a continuous nonporous cross-linked polyelectrolyte multilayer coating comprising alternating layers of a polycation polymer and a polyanion polymer, an anode coating layer comprising anode catalyst particles, a cathode coating layer comprising cathode catalyst particles, and optionally a second continuous nonporous cross-linked polyelectrolyte multilayer coating between the second surface of the proton exchange membrane and the cathode coating layer. The cross-linked polyelectrolyte multilayer coating between the proton exchange membrane and the anode and/or cathode catalyst coating layer is dissolved in an aqueous solution with a pH of greater than 7. The catalyst coated membrane is delaminated, and the anode and/or cathode catalyst is recovered.

The invention relates to a method of recovering catalyst material from a membrane electrode assembly from water electrolysis, including the steps of providing a membrane electrode assembly having a membrane coated with a metallic catalyst material, comminuting the membrane electrode assembly, pyrolytically decomposing the comminuted membrane electrode assembly to obtain a solid pyrolysis product as residue, dissolving the solid pyrolysis product in a mixture of concentrated hydrochloric acid and concentrated nitric acid, removing the nitrates by heating the solution to 100 C. to 110 C.,filtering the insoluble residue, and drying the insoluble residue at a drying temperature (TD) to recover the metallic catalyst material. The method may be employed for the recycling of a membrane electrode assembly from PEM water electrolysis, where iridium as metallic catalyst material is recovered.

A horizontal reactor equipped with a front cover and including a circular cylindrical rotating cage having multiple openings and rotated about a horizontal axis by a motor, a single horizontal rotary shaft mechanically connecting the rotating cage to the motor and extending towards the outside from the distal face of the housing, at least one bearing provided around the rotary shaft to hold it and guide it, and to support the weight of the rotating cage in cantilever, at least one removable basket having multiple openings and intended to be able to be introduced inside the rotating cage and to be removed through an open circular face of the rotating cage provided opposite the cover.

A method for recycling anode and/or cathode catalyst from the catalyst coated membranes comprising proton exchange membrane, a continuous nonporous cross-linked polyelectrolyte multilayer coating comprising alternating layers of a polycation polymer and a polyanion polymer, an anode coating layer comprising anode catalyst particles, a cathode coating layer comprising cathode catalyst particles, and optionally a second continuous nonporous cross-linked polyelectrolyte multilayer coating between the second surface of the proton exchange membrane and the cathode coating layer. The cross-linked polyelectrolyte multilayer coating between the proton exchange membrane and the anode and/or cathode catalyst coating layer is dissolved in an aqueous solution with a pH of greater than 7. The catalyst coated membrane is delaminated, and the anode and/or cathode catalyst is recovered.