Biogas residue concentration treatment device of large anaerobic fermentation tank

According to the biogas residue concentration treatment device of the large anaerobic fermentation tank, provided by the utility model, not only is the water content of materials separated in the fermentation process solved, but also fermentation treatment can be carried out in the precipitation process, and meanwhile, the liquid level can be prevented from being too high through automatic overflow; according to the technical scheme for solving the problems, the liquid storage tank comprises a tank body and is characterized in that the lower end of the tank body is conical, a liquid inlet pipe is arranged on the side face of the tank body, an overflow discharge outlet and a liquid discharge pipe are arranged at the upper end and the lower end of the side face of the tank body respectively, and a discharge outlet is formed in the lower end of the tank body. The liquid inlet pipe extends into the tank body and is connected with a liquid outlet, the liquid discharge pipe extends into the tank body and is divided