化工学报2016，Vol.67Issue(12)：5259-5267,9.DOI:10.11949/j.issn.0438-1157.20160861
N-SBR单元硝化时间分配比对A2N2系统运行性能的影响
Effect of nitrification duration distribution ratio in N-SBR unit on performance of A2N2 system operation
摘要
Abstract
A novel A2N2 system was developed to deal with low C/N domestic wastewater. The operating performance under different nitrification duration distribution ratio in N-SBR unit was investigated. The experiment was conducted as follows: under the condition of A2/O-SBR unit anaerobic was set as 1.5 h, anoxic 2 h, aerobic 0.5 h and the aeration flow rate of A2/O-SBR and N-SBR units was 100 and 120 L·h−1, respectively, and then the nitrification time distribution ratios were set as 5:1, 4:1, 3.5:1, 3:1, 7:1 and 8:1 to determine the optimal operation parameter. The results indicated that the efficient utilization of carbon sources was achieved in the A2/O-SBR unit, while the nitrification duration distribution ratio had little impact on the removal of organic substances. In order to ensure a better nitrification and denitrification and phosphorus removal performance, the first nitrification duration time must be≥3.5 h. Under the condition of total nitrification time was unchanged, an appropriate increase in the first nitrification time would greatly improve the system TN removal. An appropriate increase in the secondary nitrification time can reduce the effluent4NH+-N concentration to meet the first A discharge standard in China (GB 18918—2002). When nitrification time allocation ratio was 4:1, the system achieved the optimal nitrogen and phosphorus removal performance with average effluent concentrations of TN and34PO−-P of 11.5 and 0 mg·L−1, respectively, and the corresponding average removal efficiency was 75% and 100%, respectively.关键词
低C/N生活污水/反硝化除磷/A2N2系统/同步脱氮除磷/硝化时间分配比Key words
low C/N ratio domestic wastewater/denitrifying phosphorus removal/A2N2 system/simultaneous biological nitrogen and phosphorus removal/nitrification duration distribution ratio分类
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王梅香,赵伟华,黄宇,潘聪,彭永臻,王淑莹..N-SBR单元硝化时间分配比对A2N2系统运行性能的影响[J].化工学报,2016,67(12):5259-5267,9.基金项目
国家自然科学基金项目（51578014）；北京市教委资助项目。@@@@supported by the National Natural Science Foundation of China (51578014) and the Funding Projects of Beijing Municipal Commission of Education （51578014）
