The invention discloses a
system for directly returning
biogas residues to fields and a using method, and relates to the technical field of
livestock breeding, the
system for directly returning the
biogas residues to the fields is used for pumping
biogas slurry in a biogas digester and returning the biogas
slurry to the fields, and comprises a plurality of mud pumping pipelines, a mixing pipeline, a water
fertilizer pumping pipeline, a controller, a mud discharging pump and a mud discharging pipeline, the
sludge pumping pipelines are arranged at the bottom of the biogas digester and all communicated with the mixing pipeline, the
sludge discharging pipeline is communicated with an outlet of the
sludge discharging pump, the mixing pipeline is communicated with an inlet of the sludge discharging pump, the water
fertilizer pumping pipeline is arranged in the biogas digester and communicated with the mixing pipeline, and the controller is used for controlling the opening degree of the sludge pumping pipelines and the opening degree of the water
fertilizer pumping pipeline. By reasonably mixing the biogas
slurry and the biogas slurry with higher
solid content, the biogas slurry at the bottom of the biogas digester can be quickly cleaned and returned to the field, the
effective volume of the digester is increased, the
temporary storage time of the biogas residues is prolonged, the biogas residues are reasonably applied to the land, the
weight loss and income increase of crops are facilitated, and the
resource utilization is realized.