Plant fat deep processing production wastewater treatment system

The utility model discloses a wastewater treatment system for deep processing production of vegetable fat. The wastewater treatment system comprises a vegetable fat rough processing sewage pretreatment system, a pretreatment system for other production and domestic sewage and a mixed sewage treatment system, water outlets of the vegetable fat rough processing sewage pretreatment system and the other production and domestic sewage pretreatment system are communicated with the mixed sewage treatment system; the mixed sewage treatment system comprises an adjusting tank, an air flotation device, a hydrolytic acidification and desulfurization tank, an MABR anaerobic tank, an A/O biochemical tank, a secondary sedimentation tank and a two-stage phosphorus removal sedimentation tank which are connected in sequence; and a water outlet of the two-stage dephosphorization sedimentation tank is a standard wastewater discharge outlet. The device is stable in operation, simple to operate, convenient to manage and good in tr