摘要：In order to reduce the salinity after treatment of steel industry wastewater and improve the use value after wastewater treatment, this study completed the deep treatment of high-salt wastewater in steel industry through membrane combination process. After the operation of the whole membrane combination process, the pretreatment of the MBR membrane keeps the pollution index of the wastewater within the range of 4-5; then, using the ultrafiltration membrane synergistic treatment process, the pollution index is reduced to less than 3, which can completely satisfy the reverse osmosis. The system's demand for influent pollution index. By operating the pressure conditions, the maximum flux of the membrane has a corresponding frequency, and the maximum membrane flux at which the pump operating pressure is high lags behind the pump operating pressure. During the whole process operation, it can be seen that the desalination of high-salt wastewater is close to the wastewater treatment cost, and the benefits generated by the desalinated wastewater reuse are basically balanced, and the operating cost of the enterprise is no longer increased. In the protection of the environment, the company's benefits and costs are taken into account.
关键词：Membrane combination process; MBR membrane treatment; ultrafiltration membrane synergy; pollution index; high salt wastewater
