(NL9401454-A)      Anaerobic fermentation of solid organic waste takes place in a reactor tank (1) in which there is a mixt. of solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on a methane generating fluid is moved from a supply end (7) of the reactor to a discharge end (12) and a methane generating reaction is induced in the methane generating fluid. Fluid extracted from the fluid under the floating layer is fed (via lines 16, 18) to nozzles (19) which spray the fluid into or onto the floating layer in order to induce fermentation in the floating layer and, by percolation, to remove acid fermentation prods. from the floating layer and deliver them to the methane generating zone. The floating layer (10) is moved (11) in a controlled manner so that the fermentation can take place in the floating layer. Also claimed is the reactor used in the fermentation process.    USE -   The reactor is used in the anaerobic fermentation of e.g. vegetable, fruit, garden, household and organic industrial waste.    ADVANTAGE -   Residence times in the floating and methane generating layers can be different and controlled independently without complicated appts., while fermentation in the floating layer is enhanced.    (TW270107-A)      For the anaerobic fermentation of solid organic waste materials, solid waste is mixed with liquid material, in particular anaerobic slurry, and the temperature of the mixture is brought to a value between 25 and 70 deg.C, preferably between 30 and 40 deg.C (mesophilic) and between 55 and 65 deg.C (thermophilic). Through the spontaneous rising of light material to the surface and through flotation, a layer of solid material floating on a methanogenic zone is formed in a reactor from the abovementioned mixture. This floating layer moves gradually from a feed end or a mixing section to a discharge end of the reactor, in the course of which hydrolysis and acidification of solid organic material take place in the floating layer. The fermented floating layer is discharged at the discharge end independently of the residence time of liquid and slurry in the methanogenic zone below the floating layer.    (JP10504967-W)      Anaerobic fermentation of solid organic waste takes place in a reactor tank (1) in which there is a mixt. of solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on a methane generating fluid is moved from a supply end (7) of the reactor to a discharge end (12) and a methane generating reaction is induced in the methane generating fluid. Fluid extracted from the fluid under the floating layer is fed (via lines 16, 18) to nozzles (19) which spray the fluid into or onto the floating layer in order to induce fermentation in the floating layer and, by percolation, to remove acid fermentation prods. from the floating layer and deliver them to the methane generating zone. The floating layer (10) is moved (11) in a controlled manner so that the fermentation can take place in the floating layer. Also claimed is the reactor used in the fermentation process.    USE -   The reactor is used in the anaerobic fermentation of e.g. vegetable, fruit, garden, household and organic industrial waste.    ADVANTAGE -   Residence times in the floating and methane generating layers can be different and controlled independently without complicated appts., while fermentation in the floating layer is enhanced.    (US5773526-A)      Anaerobic fermentation of solid organic waste takes place in a reactor tank (1) in which there is a mixt. of solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on a methane generating fluid is moved from a supply end (7) of the reactor to a discharge end (12) and a methane generating reaction is induced in the methane generating fluid. Fluid extracted from the fluid under the floating layer is fed (via lines 16, 18) to nozzles (19) which spray the fluid into or onto the floating layer in order to induce fermentation in the floating layer and, by percolation, to remove acid fermentation prods. from the floating layer and deliver them to the methane generating zone. The floating layer (10) is moved (11) in a controlled manner so that the fermentation can take place in the floating layer. Also claimed is the reactor used in the fermentation process.    USE -   The reactor is used in the anaerobic fermentation of e.g. vegetable, fruit, garden, household and organic industrial waste.    ADVANTAGE -   Residence times in the floating and methane generating layers can be different and controlled independently without complicated appts., while fermentation in the floating layer is enhanced.    (EP779920-B1)      Anaerobic fermentation of solid organic waste takes place in a reactor tank (1) in which there is a mixt. of solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on a methane generating fluid is moved from a supply end (7) of the reactor to a discharge end (12) and a methane generating reaction is induced in the methane generating fluid. Fluid extracted from the fluid under the floating layer is fed (via lines 16, 18) to nozzles (19) which spray the fluid into or onto the floating layer in order to induce fermentation in the floating layer and, by percolation, to remove acid fermentation prods. from the floating layer and deliver them to the methane generating zone. The floating layer (10) is moved (11) in a controlled manner so that the fermentation can take place in the floating layer. Also claimed is the reactor used in the fermentation process.    USE -   The reactor is used in the anaerobic fermentation of e.g. vegetable, fruit, garden, household and organic industrial waste.    ADVANTAGE -   Residence times in the floating and methane generating layers can be different and controlled independently without complicated appts., while fermentation in the floating layer is enhanced.    (CN1158635-A)      Anaerobic fermentation of solid organic waste takes place in a reactor tank (1) in which there is a mixt. of solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on a methane generating fluid is moved from a supply end (7) of the reactor to a discharge end (12) and a methane generating reaction is induced in the methane generating fluid. Fluid extracted from the fluid under the floating layer is fed (via lines 16, 18) to nozzles (19) which spray the fluid into or onto the floating layer in order to induce fermentation in the floating layer and, by percolation, to remove acid fermentation prods. from the floating layer and deliver them to the methane generating zone. The floating layer (10) is moved (11) in a controlled manner so that the fermentation can take place in the floating layer. Also claimed is the reactor used in the fermentation process.    USE -   The reactor is used in the anaerobic fermentation of e.g. vegetable, fruit, garden, household and organic industrial waste.    ADVANTAGE -   Residence times in the floating and methane generating layers can be different and controlled independently without complicated appts., while fermentation in the floating layer is enhanced.