【摘要】 反硝化除磷技术因节约碳源、能源而备受关注。以实验室稳定运行的连续流厌氧/缺氧/好氧(AAO)和厌氧/好氧(AO)除磷工艺污泥为研究对象,设计批式试验考察了硝酸盐及亚硝酸盐为电子受体时两种污泥反硝化除磷代谢过程。根据不同电子受体磷去除速率的差异将上述两系统内聚磷菌细分为以氧为唯一电子受体的聚磷菌(PO),仅以氧、硝氮为电子受体的聚磷菌(PON)和能以氧、硝氮及亚硝氮为电子受体的聚磷菌(PONn)3类,分析结果表明AAO工艺聚磷菌中上述3类功能微生物数量比约为54∶16∶30,而AO工艺聚磷菌中上述3类功能微生物数量比约为77∶3∶20。结合聚磷菌划分进一步讨论了不同系统污泥反硝化除磷过程中重要胞内聚合物PHB变化与吸磷量之间的统计关系。更多还原

【Abstract】 More and more attention is paid on denitrifying phosphorus removal because of its bright foreground on carbon and energy saving. Real sewage fed, bench-scale, study and batch tests are carried out with anaerobic-anoxic-aerobic (AAO)unit and anaerobic-aerobic(AO)unit. Process of phosphorus removal with nitrate and nitrite as electronic acceptors are recorded. Phosphorus accumulative organisms(PAOs)in the each unit is classified into three classes named PO(one can only utilize oxygen to take up phosphorus), PON (they can use both oxygen and nitrate)and PONn (a new group of phosphorus removal bacteria, which could use oxygen, nitrate or nitrite to take up phosphorus). According to result of experiments, proportion of PO, PON and PONn in PAOs of AAO unit and AO unit is 54∶16∶30 and 77∶3∶20 respectively. Finally, statistical relationship between PHB decrease and phosphorus removal is described.更多还原