A steel enterprise comprehensive wastewater treatment and recycling system

Abstract

This utility model discloses a comprehensive wastewater treatment and reuse system for steel enterprises, comprising a primary pretreatment system, a secondary advanced treatment system, and a tertiary desalination system. The primary pretreatment system includes a first bar screen channel, a first equalization tank, an A / A / O biological treatment tank, a coagulation sedimentation tank, and an MBBR tank connected in sequence. The secondary advanced treatment system includes a second bar screen channel, a second equalization tank, a high-density sedimentation tank, a V-type filter, and a greywater tank connected in sequence. The tertiary desalination system includes an ultrafiltration membrane tank, an ultrafiltration permeate tank, a security filter, a reverse osmosis unit, and a demineralized water tank connected in sequence. The effluent from the MBBR tank in the primary pretreatment system is connected to the second bar screen channel in the secondary advanced treatment system. This system is rationally designed and proposes different reuse schemes based on the enterprise's water requirements, enabling the reused water to meet various water needs of the enterprise, significantly improving the water utilization rate of steel enterprises and reducing operating costs.

Images