NOVELTY - The biogas plant for producing a biogas from a ferment containing an agricultural waste, a slaughter waste, silage or energy plants, comprises a fermenter (1) for microbial decomposition of the ferment, a feeding system with nozzles (13) for injecting biogas into the ferment, and a gas storage (2) for the biogas produced in the fermenter. The nozzles have flow cross-section of 2-3 mm2 and are arranged on a base of the fermenter. Five nozzles per square meter are intended in respective part of the base. The feeding system comprises pipe or tubular system.    USE - For producing biogas from ferment containing agricultural waste, slaughter waste, silage or energy plants.    ADVANTAGE - The biogas plant is simple and cost effective to manufacture, requires less energy for mixing of ferment and ensures low maintaining cost.    DETAILED DESCRIPTION - The biogas plant for producing a biogas from a ferment containing an agricultural waste, a slaughter waste, silage or energy plants, comprises a fermenter (1) for microbial decomposition of the ferment, a feeding system with nozzles (13) for injecting biogas into the ferment, and a gas storage (2) for the biogas produced in the fermenter. The nozzles have flow cross-section of 2-3 mm2 and are arranged on a base of the fermenter. Five nozzles per square meter are intended in respective part of the base. The feeding system comprises pipe or tubular system located on a base line (11, 12) of the base. The base line exhibits a jacket that is provided with a part of the nozzles. The base line comprises loops, node area and branches branching the node area, is turned in spiral or meander form and is held in a frame that rests on the base and holds the base line over its total length. The tube or pipe forms turn and is extended vertically over a vertical line (10) that rises from the base or extends closely to the base. The jacket of the vertical line is provided with the nozzles. The fermentation gas is supplyable by the vertical line of the base line. The jacket is perforated for formation of the hole-type nozzles that exhibit exit axles angular to each other. The exit axles cross a common axle of the nozzles. The base line has a flow cross-section of 120 cm2. The nozzles are arranged in longitudinal or down direction of the base line in distributed manner. The feeding system comprises a pressure controlling- or regulating arrangement, by which a positive pressure of the biogas is adjustable to 1 bar or more. A substrate supply serves the supply of microbial degradable substrate into the fermenter. A mouth area, in which the substrate supply flows into the feeding system, is formed in such a way that the substrate is sucked by the flowing of fermentation gas into the feeding system. Venturi nozzle is formed in the mouth area and the substrate supply flows into a nozzle area of static low pressure. The fermenter has an inner cross-section of 25plus minus10 m2 and a height of 8plus minus5 m. An INDEPENDENT CLAIM is included for a procedure for the production of biogas.    DESCRIPTION OF DRAWING(S) - The diagram shows a biogas plant:    Fermenter; (1)    Gas storage; (2)    Vertical line; (10)    Base line; (11, 12)    Nozzles. (13)