NOVELTY - A biogas installation for anaerobic fermentation of organic waste, comprises a reservoir with cupola and bottom, inside of which is arranged coaxially internal and external chamber for fermentation, and also branch pipe of supply of the diluted organic waste, connected to the inner chamber, where the chamber is made of isolated external chamber, arranged inside it and is connected to by the external chamber through the system of branch pipes which connects inner chamber with the hydraulic pump, which is in turn is connected via branch pipe to separator.    USE - The biogas installation is useful for anaerobic fermentation of organic waste (claimed).    DETAILED DESCRIPTION - A biogas installation for anaerobic fermentation of organic waste, comprises a reservoir with cupola and bottom, inside of which is arranged coaxially internal and external chamber for fermentation, and also branch pipe of supply of the diluted organic waste, connected to the inner chamber, where the chamber is made of isolated external chamber, arranged inside it and is connected to by the external chamber through the system of branch pipes, which consists of the branch pipe, which connects inner chamber with the hydraulic pump, which is in turn is connected via branch pipe to the separator, where it is carried out separation of the volatile of fatty acids from substrate, formed after phases of hydrolysis and acid-genesis, and which has two outputs, the first of which via branch pipe is connected to by compressor, by which other by about one branch pipe is connected to by the inner chamber, and the second output of separator is connected to an external chamber by the branch pipe, through which the substrate enters of one's own accord gravity into external chamber, further into pipelines enter the conduit for the care of a fermented weight, connected to the output of external chamber, and the conduit to the heat sink of generatable biogas, connected through the reduction valve and the branch pipe to the cupola of reservoir, and by another end to the user of biogas, where it additionally contains a hydrodynamic cavitator, connected with the source of diluted organic waste and with the branch pipe, connected to the inner chamber, installed directly on the bottom of reservoir, made inclined, and is also further added the branch pipe, connected to the conduit housing having a biogas and through the throttle valve is connected to the input of the compressor, where the biogas is mixed with the volatile fatty acids, and which through the port is connected to bubbler, installed on the bottom of the internal chamber of biogas installation, and, in addition, further installed the branch pipe, connected to the conduit, that are biogas, and to the bubbler, installed on the bottom of the external chamber of biogas installation.