Treatment system for fruit and vegetable garbage squeezed liquid or fermented biogas slurry

The utility model belongs to the technical field of sewage treatment, and particularly relates to a treatment system for fruit and vegetable garbage squeezed liquid or fermented biogas slurry. The system comprises a pretreatment unit, a biochemical treatment unit, an advanced treatment unit and a sludge dewatering unit, the pretreatment unit is suitable for filtering squeezed liquid or biogas slurry and generating grid slag and dross through flocculation and air flotation; the biochemical treatment unit is suitable for removing pollutants from effluent of the pretreatment unit and separating out sludge; the advanced treatment unit is suitable for carrying out secondary pollutant removal on effluent of the biochemical treatment unit and separating out sludge; the sludge dewatering unit is suitable for dewatering dross and sludge and outputting a generated sludge cake. Under the current situation that mature cases exist in the domestic fruit and vegetable garbage squeezed liquid or fermentation biogas slurry tr