Abstract:Two parallel anaerobic-aerobic SBRs were conducted to evaluate the impacts of different COD/P ratio on contaminant removal and nitrous oxide (N2O) emission during simultaneous nitrification and denitrification (SND) process. The results showed that the removal efficiencies of COD and ammonium were more than 90% in both SBRs. TP and TN removal was enhanced simultaneously with the decrease of COD/P ratio. It was mainly caused by the enrichment of polyphosphate accumulating organisms (PAOs) at low COD/P ratio. Part of PAOs could use nitrate/nitrite as electron acceptors to take up the phosphorus. N2O emission was reduced with the decrease of COD/P ratio. The N2O emission amount per cycle at low COD/P ratio was only 76% of that at high ratio. It was due to the decrease of N2O yield by heterotrophic denitrification.
王榕, 成鹏飞, 张建, 贾文林, 谢慧君, 闫玉洁. 碳磷比对SND过程污染物去除及N2O释放的影响[J]. 中国环境科学, 2014, 34(2): 378-382.
WANG Rong, CHENG Peng-Fei, ZHANG Jian, JIA Wen-Lin, XIE Hui-Jun, YAN Yu-Jie. Effects of COD/P ratio on contaminant removal and N2O emission during simultaneous nitrification and denitrification process. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(2): 378-382.