Application of the Aerobic-Media Trickling Filter to Nitrogen Control in Wastewater Treatment

摘要

Chemical and microbiological evaluation of a bench-scale aerobic-media trickling filter (AMTF) showed the system to be successful in promoting rapid nitrification of a synthetic secondary-treated sewage effluent. Efficient nitrification occurred for a variety of hydraulic and substrate-nitrogen loadings. Microbiological analyses of the pure oxygen fixed-film reactor indicated that the nitrification process is more dependent upon the activity levels of the nitrifying bacteria than on their absolute densities. Both heterotrophic and nitrifying bacteria were distributed throughout the entire depth of the AMTF without any distinct population profiles. Although pH depression occurred in the lower half of the reactor, nitrifying bacteria densities were not seriously affected.