摘要：The water has been severely polluted by ammonia and organic pollutants so that water treated by conventional processes cannot achieve the standards for drinking water quality. This study was focused on improving the combined treatment technologies to treat polluted water. A pilot plant of combined drinking water treatment processes was built, a series of field experiments were carried out, and the removal mechanisms and efficiencies of pollutants treated by the combined processes were discussed. The combined drinking water treatment processes were observed to be effective in removing turbidity, particle counts, ammonia, organic pollutants, Fe, and Mn. Moreover, two typical combined water treatment processes and their applicable raw water quality were conducted. When the concentrations of ammonia and organic pollutants in the raw water ranged from 1.5 to 3 and 6 to 8 mg/L, respectively, the combined drinking water treatment processes that included biological pre-treatment, conventional treatment, ozone oxidation, and biologically activated carbon (O3-BAC) treatment processes were recommended. When these concentrations exceeded the aforementioned concentrations, two phases of O3-BAC treatment processes were necessary, in addition to biological pre-treatment and conventional treatment process, to meet the standards for drinking water quality. Moreover, two phases of sand filtration are recommended to ensure drinking water quality.
关键词：ammonia; combined treatment processes; drinking
water; field experiment; organic pollutants
