化工学报2016，Vol.67Issue(7)：2987-2997,11.DOI:10.11949/j.issn.0438-1157.20160107
A2N2双污泥系统反硝化除磷工艺的启动与稳定
Startup and stability of A2N2 double sludge system denitrifying phosphorus removal process
摘要
Abstract
The A2N2-SBR (anaerobic/nitrification/anoxic/nitrification) double sludge system was investigated by using low C/N domestic sewage. This study focused on the characteristics of nitrifying bacteria biofilm membrane and denitrifying phosphorus accumulating bacteria (DPAOs) domestication and cultivation, A2N2 double sludge denitrifying phosphorus removal process denitrification and phosphorus removal characteristics of the startup process. The results showed that by connecting sludge to A2/O-SBR unit and N-SBR unit, respectively to culture domestication phosphorus accumulating bacteria sludge and nitrifying bacteria biofilms separately. By using the A2/O-SBR unit effluent as the influent of N-SBR nitrifying units, the nitrification biofilm was grown up successfully within 25 d. The ammonia nitrogen removal rate was stable above 93%. In the A2/O-SBR unit, the sludge mixture was operated under anaerobic/aerobic (A/O) condition firstly. Then, the activated sludge was conducted under anaerobic/anoxic (A/A) condition, which reinforced the effect of the inoculating sludge denitrifying phosphorus removal commendably. After 43 d, the denitrifying phosphorus accumulating bacteria (DPAOs) was successfully enriched. DPAOs accounted PAOs for 67.81%. The denitrifying phosphorus removal rate steadily stayed above 77.9%. After startup successfully, about 73%, 13% COD of raw water was used by phosphorus accumulating bacteria during the A2/O-SBR unit anaerobic phase and was removed in the N-SBR unit aeration process, respectively. The A2N2 system effluent COD, NH+4-N, PO43−-P, TN concentrations was 40.6, 0, 0.4 and 13.5 mg·L−1, respectively, meeting national level A emission standards. It was suggested that A2N2 double sludge system denitrifying phosphorus removal process with good denitrification and phosphorus removal performance.关键词
A2N2 双污泥系统/反硝化除磷/生活污水/序批式反应器/启动Key words
A2N2 double sludge system/denitrifying phosphorus removal/domestic sewage/sequencing batch reactor/startup分类
环境科学引用本文复制引用
王梅香,赵伟华,王淑莹,张勇,彭永臻,潘聪,黄宇..A2N2双污泥系统反硝化除磷工艺的启动与稳定[J].化工学报,2016,67(7):2987-2997,11.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）
