NOVELTY - Biogas system comprises inlet and outlet material cylinder, annular fermentation pipe and marsh gas fermentation system. The fermentation system comprises main body, inlet and outlet material cylinder, which is connected with annular fermentation material pipe. The inlet and outlet material cylinder consists of feedstock tube (10) and discharging tube (20), where the feed tube is extended between the discharge pipe to bottom of the fermentation pipes and separates fermentation pipelines (30).    USE - Biogas system.    DETAILED DESCRIPTION - Biogas system comprises inlet and outlet material cylinder, annular fermentation pipe and marsh gas fermentation system. The fermentation system comprises main body, inlet and outlet material cylinder, which is connected with annular fermentation material pipe. The inlet and outlet material cylinder consists of feedstock tube and discharging tube, where the feed tube is extended between the discharge pipe to bottom of the fermentation pipes and separates fermentation pipelines. Pressure mounted on the top of the ring between the fermentation pipe, which is present between the feed tube is connected to drainage pipe. The drainage pipe is connected with discharge pipe between the feedstock pipe. Annular fermentation pipe and discharging pipe are connected with discharging pipe plate, blocking plate (34) and feedstock material blocking plate (36). Fermentation area is formed between adjacent blocking plate. The fermentation area on the top is connected to air pipe (38), which is provided with valve. The biogas system also includes cloth bacteria device, which includes inter-drain cloth, cloth bacteria pipes, cloth bacteria hole, drain pipe and hydraulic connections. The cloth bacteria device is circular pipe, which is fixed to the endless cloth bacteria ferment pipeline. The cloth bacteria has holes on vertical direction through the cloth bacteria pipeline.    DESCRIPTION OF DRAWING(S) - The drawing shows a perpective view of the biogas system.    Feedstock tube (10)    Discharging tube (20)    Fermentation pipelines (30)    Blocking plate (34)    Feedstock material blocking plate (36)    Air pipe (38)