Removal of NH3-N, NO2-N and UV254 organics by biological activated carbon fiber
A novel water treatment technique, biological activated carbon fiber (BACF), was applied to remove NH3-N and NO2-N from slightly polluted water. Activated carbon fiber (ACF), inoculated with microorganism, was used as packing material. Its performance was compared with that of biological activated carbon (BAC) and ACF. Much higher efficiency of NH3-N and NO2-N removal from slightly polluted water was achieved by BACF than BAC and ACF. The results of removal efficiency of NH3-N, NO2-N, UV254 organics and microorganism morphology at different period of water treatment suggested that physical adsorption of NH3-N, NO2-N and UV254 organics by BACF was responsible for the first five days, and the quantity microorganism formed on the activated carbon fiber was much less by scanning electron microscope (SEM), but after which NH3-N, NO2-N and UV254 organics were biodegraded by inoculated microorganisms. The dynamic steady state between physical adsorption and biodegradation was about one week. At this period, the appearance, quantity and species of microorganism formed on the activated carbon fiber were also much more. After the system achieved equilibrium, the BACF column exhibited high adaptation to shock loading, elevated temperature, and flow rate. 90.6％, 96.2％ and 90.8％ removal efficiencies for NH3-N, NO2-N and UV254 organics were respectively achieved during the 45-day operating period. Even on the 45-day operation, the removal efficiency for the three kinds of pollutants was achieved above 72.0％, 60.0％ and 55.0％, respectively. The results also demonstrated that NO2-N removal was not affected by NH3-N, which was concluded that the denitrification was occurred in BACF column. A simple periodic backwash system was used to regenerate the used BACF and BAC.
immobilized microorganism activated carbon fiber water treatment NH3-N NO2-N
YIN Yan-e HU Zhong-hua SHEN Xin-qiang YIN Yan-e HU Zhong-hua SHEN Xin-qiang
East China Sea Fisheries Research Institute, Chinese Academy of Fisheries SciencesKey and Open Labo Department of Chemistry, Tongji University, 1239 Siping Road, Shanghai 200092,China East China Sea Fisheries Research Institute,Chinese Academy of Fisheries SciencesKey and Open Labor East China Sea Fisheries Research Institute,Chinese Academy of Fisheries SciencesKey and Open Labor
国际会议
上海
英文
3271-3275
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）