Sustainable Mining and Metallurgy

During the upgrading process, to prevent production disruption and ensure stable product water quality, a sewage treatment plant has made full use of the existing and new process units through reasonable construction planning, and established a temporary process line of “super magnetic pretreatment+membrane grille+MBR membrane cisterns” to carry out in-plant diffluent treatment, effectively solving the sewage discharge problem that may be caused by upgrading-induced production reduction of the original system. By adopting the emergency quality guarantee process, the product water quality during the upgrading was kept stable and met the discharge requirements (CODcr≤50mg/L, ammonia nitrogen≤5(8)mg/L, total nitrogen≤15mg/L, total phosphorus≤0.5mg/L). The emergency process thus prevented the possible environmental pollution of sewage discharge due to production reduction, and the investment was low.