NOVELTY - The plant for the production of biogas, comprises a fermenter (2) operating according to the principle of dry fermentation for producing biogas in batch-mode with a biogas outlet (8) and a purge gas inlet (24), a biogas pipeline (12) connected with the biogas outlet, an exhaust gas pipeline (26) introduced into the purge gas inlet by carbon dioxide containing exhaust gas, an exhaust gas chimney that is connected over a first biogas/exhaust gas pipeline with the biogas outlet, and an exhaust gas flare that is connected over a second biogas/exhaust gas pipeline with the biogas outlet.    USE - Plant for the production of biogas.    ADVANTAGE - The plant ensures efficient and safe production of the biogas with high quality and quantity without explosion danger in less-time consuming manner.    DETAILED DESCRIPTION - The plant for the production of biogas, comprises a fermenter (2) operating according to the principle of dry fermentation for producing biogas in batch-mode with a biogas outlet (8) and a purge gas inlet (24), a biogas pipeline (12) connected with the biogas outlet, an exhaust gas pipeline (26) introduced into the purge gas inlet by carbon dioxide containing exhaust gas, an exhaust gas chimney that is connected over a first biogas/exhaust gas pipeline with the biogas outlet, an exhaust gas flare that is connected over a second biogas/exhaust gas pipeline with the biogas outlet, a fresh air pipeline that is connected with the purge gas inlet, a controlling device for connecting the biogas outlet with the biogas pipeline or with the exhaust gas chimney over the first biogas/exhaust gas pipeline or with the exhaust gas flare over the second biogas/exhaust gas pipeline and for connecting the purge gas inlet with the exhaust gas pipeline or with the fresh air pipeline, and a measuring unit that is connected with the controlling device and has a first measuring sensor for the detection of methane concentration in a common biogas pipeline and a second sensor for the detection of carbon dioxide concentration in the gas mixture emerging from the fermenter in the common biogas/exhaust gas pipeline. The measuring units are arranged in the biogas outlet. The biogas outlet of the fermenter ends in the common biogas pipeline. The biogas outlets are connected over the common biogas/exhaust gas pipeline with the exhaust gas chimney or the exhaust gas flare. The exhaust gas pipeline brings exhaust fumes from an internal combustion engine. The biogas pipeline produces the connection to a biogas utilization arrangement that produces carbon dioxide gas containing exhaust gas and has a block heating unit, fuel cell and a gas processing device. INDEPENDENT CLAIMS are included for:    (1) method for switching off fermenters in biogas plant; and    (2) method for conveying fermenters loaded with fresh biomass.    DESCRIPTION OF DRAWING(S) - The figure shows a plant for the production of biogas.    Fermenter (2)    Biogas outlet (8)    Biogas pipeline (12)    Purge gas inlet (24)    Exhaust gas pipeline. (26)