The invention discloses a defoaming
biogas digester, which comprises a gas storage chamber and a
fermentation chamber, and also includes a stirrer, an annular hole is opened on the outer wall of the gas storage chamber, and the stirring shaft of the stirrer extends into the
fermentation chamber through the annular hole , the stirring shaft is provided with a stirring blade located in the
fermentation chamber, a card cover is set on the stirring shaft located outside the gas storage chamber, a
discharge pipe is provided in the fermentation chamber, and a
discharge cover is provided at the outlet of the
discharge pipe, The top of the air storage chamber is fixedly connected with a
solar heat collector, and the
solar heat collector is connected with a heat collection return
pipe, the stirring shaft is a hollow stirring shaft, the stirring blade is a hollow stirring blade, the hollow stirring shaft and the hollow stirring The blades are provided with defoaming holes, and the top of the stirring shaft is connected with a vacuum
defoamer. The present invention can maintain a good temperature in the fermentation chamber by arranging a
solar heat collector, and the motor drives the paddles to rotate to generate a vortex, which can fully decompose the fermentation raw materials, thereby increasing the
biogas output.