Long-term performance of the novel functional regulated Biologically activated carbon filters for drinking water

To strengthen BAC to stably remove from source water, improve the removal efficiency of organic matters in water, and reveal the characteristics of some microorganisms to enhance BAC.Based on the best interface control mode, this subject constructed four groups of continuous flow BAC two-stage process filter column devices, carried out continuous flow experiments, and coupled the PAA preoxidation process at the front end of the interface control BAC filter column device to accelerate the formation of the biofiltration process on the premise of determining the optimal load and impact capacity of the interface control BAC process to remove pollutants. During the experiment, for 1mg ammonium removal, the alkalinity consumption of filter C was 6.11mg/L, and the traditional nitrification and denitrification, SND or nitrification anaerobic ammonia oxidation processes of C filter column account for the largest proportion, which confirmed the existence of nitrogen loss process. In addition, the content of total nitrogen continued to decline, the removal efficiency of total nitrogen was high, and the removal efficiency of period b even exceeded 70%, this result indicated that denitrification accounted for a large proportion in the experiment. When the PAA preoxidation coupling interface regulates the BAC process, the BAC biomass of filter C was 1.48 times that of filter D, which indicated that the increase of AOC content in water accelerated the growth of microorganisms on activated carbon and improved the biodegradability. Moreover, the removal of BPA and by filter C was better than that by filter D, the results above indicated that the PAA preoxidation coupling interface regulates the BAC process can effectively remove and polluted organic matter in source water.