(FR2744937-A1)      Process for treatment of organic waste in open circuit comprises:    (a) collecting the waste;    (b) charging the waste, without preliminary sterilisation, into a first reactor containing anaerobic thermophilic bacteria;    (c) breaking the waste down by the anaerobic thermophilic bacteria at a temperature at which any pathogenic microorganisms present are eliminated;    (d) transferring the effluent from this degradation into a second reactor containing heterotropic or photo-heterotropic bacteria;    (e) producing an edible biomass comprising the said heterotropic or photo-heterotropic bacteria, and    (f) recovering and packaging the biomass.    USE -   The process is used for recycling domestic, agricultural and industrial organic waste, water treatment sludges or effluents from intensive rearing of animals, to give a product suitable for use as an animal feed.    ADVANTAGE -   The process produces no environmental pollution, requires less time than composting and produces a useful product, so that it gives better valorisation of the waste than e.g. incineration.    (EP882135-A1)      Open-circuit organic waste processing method comprises:    (a) collecting the waste;    (b) feeding the waste into a first reactor (R1) without prior sterilisation;    (c) decomposing the waste in R1 using mesophilic or thermophilic anaerobic bacteria;    (d) recovering the resulting liquid effluent and transferring it into a second reactor (R2) containing heterotrophic or photo-heterotrophic bacteria;    (e) using these bacteria to produce an edible biomass consisting of the bacteria, and    (f) recovering and packaging the biomass.    Also claimed is an apparatus for the process comprising R1, consisting or a vessel (2) having an inlet (3) for waste and an outlet (7) for recovery of liquid effluent, and R2, consisting of a vessel (11) having an outlet (14) for recovery of biomass.    The effluent from R1 is transferred (2) to R2 and the biomass is stored (18).    USE -   The method is useful for recycling organic animal waste (such as liquid manure) or water purification sludge for production of animal feed.    ADVANTAGE -   The process is useful for the environmentally acceptable utilisation of waste at low cost on an industrial scale to produce valuable products, i.e. edible biomass of high nutrient value (useful in animal feed), readily utilised combustible gas and compost for use as fertiliser. No toxic residues are produced.    (JP2000505353-W)      Open-circuit organic waste processing method comprises:    (a) collecting the waste;    (b) feeding the waste into a first reactor (R1) without prior sterilisation;    (c) decomposing the waste in R1 using mesophilic or thermophilic anaerobic bacteria;    (d) recovering the resulting liquid effluent and transferring it into a second reactor (R2) containing heterotrophic or photo-heterotrophic bacteria;    (e) using these bacteria to produce an edible biomass consisting of the bacteria, and    (f) recovering and packaging the biomass.    Also claimed is an apparatus for the process comprising R1, consisting or a vessel (2) having an inlet (3) for waste and an outlet (7) for recovery of liquid effluent, and R2, consisting of a vessel (11) having an outlet (14) for recovery of biomass.    The effluent from R1 is transferred (2) to R2 and the biomass is stored (18).    USE -   The method is useful for recycling organic animal waste (such as liquid manure) or water purification sludge for production of animal feed.    ADVANTAGE -   The process is useful for the environmentally acceptable utilisation of waste at low cost on an industrial scale to produce valuable products, i.e. edible biomass of high nutrient value (useful in animal feed), readily utilised combustible gas and compost for use as fertiliser. No toxic residues are produced.    (US6077548-A)      Open-circuit organic waste processing method comprises:    (a) collecting the waste;    (b) feeding the waste into a first reactor (R1) without prior sterilisation;    (c) decomposing the waste in R1 using mesophilic or thermophilic anaerobic bacteria;    (d) recovering the resulting liquid effluent and transferring it into a second reactor (R2) containing heterotrophic or photo-heterotrophic bacteria;    (e) using these bacteria to produce an edible biomass consisting of the bacteria, and    (f) recovering and packaging the biomass.    Also claimed is an apparatus for the process comprising R1, consisting or a vessel (2) having an inlet (3) for waste and an outlet (7) for recovery of liquid effluent, and R2, consisting of a vessel (11) having an outlet (14) for recovery of biomass.    The effluent from R1 is transferred (2) to R2 and the biomass is stored (18).    USE -   The method is useful for recycling organic animal waste (such as liquid manure) or water purification sludge for production of animal feed.    ADVANTAGE -   The process is useful for the environmentally acceptable utilisation of waste at low cost on an industrial scale to produce valuable products, i.e. edible biomass of high nutrient value (useful in animal feed), readily utilised combustible gas and compost for use as fertiliser. No toxic residues are produced.