中文关键词反硝化除磷(DPR)同步硝化内源反硝化(SNED)聚磷菌(PAOs)城市污水硝酸盐废水 英文关键词denitrifying phosphorus removal (DPR)simultaneous nitrification endogenous denitrification (SNED)phosphorous accumulating organisms (PAOs)municipal wastewaternitrate-contained sewage

作者	单位	E-mail
杜世明	青岛大学环境科学与工程学院, 青岛 266071	d_shiming@163.com
于德爽	青岛大学环境科学与工程学院, 青岛 266071
毕春雪	青岛大学环境科学与工程学院, 青岛 266071
王晓霞	青岛大学环境科学与工程学院, 青岛 266071	elainewangxx@163.com
陈光辉	青岛大学环境科学与工程学院, 青岛 266071
袁梦飞	青岛大学环境科学与工程学院, 青岛 266071
甄建园	青岛大学环境科学与工程学院, 青岛 266071
张帆	青岛大学环境科学与工程学院, 青岛 266071
吕廷廷	青岛大学环境科学与工程学院, 青岛 266071

中文摘要 为实现低C/N城市污水与含硝酸盐废水的同步处理，采用SBR接种活性污泥，通过合理控制厌氧/缺氧/低氧时间和溶解氧（DO）浓度，实现了反硝化除磷耦合同步硝化内源反硝化（DPR-SNED）系统的启动，并对启动过程中系统的脱氮除磷特性进行了研究.结果表明采用厌氧/低氧的运行方式，控制厌氧时间为3 h，好氧段DO浓度为0.5~1.0 mg·L^-1，60 d可实现同步硝化内源反硝化除磷（SNEDPR）系统的启动，出水PO₄^3--P浓度<0.5 mg·L^-1，系统氮磷去除率维持在90%以上，COD的去除率维持在80%以上，系统SNED率和COD_ins率分别维持在70%和95%左右；随后改变运行方式，采用厌氧/缺氧/低氧的方式运行，缺氧段前进含硝酸盐废水，45 d可实现DPR-SNED系统的启动，缺氧末PO₄^3--P浓度<1.1 mg·L^-1，出水PO₄^3--P浓度<0.5 mg·L^-1，系统磷、COD去除率均维持在90%以上，氮去除率维持在88%以上，系统SNED率和COD_ins率分别维持在62%和90%左右.DPR-SNED系统的成功启动后，厌氧段聚糖菌和聚磷菌对城市污水有限碳源的充分利用和强化储存，可为后续缺氧段及好氧段的脱氮除磷提供充足的内碳源.此外，DPR-SNED系统缺氧段内源短程反硝化的进行保障了系统在低C/N（4）条件下的高效脱氮. 英文摘要 In order to realize the simultaneous treatment of low C/N municipal wastewater and high nitrate wastewater, a sequencing batch reactor (SBR), inoculated with activated sludge, was used to initiate the denitrifying phosphorus removal coupled with simultaneous nitrification and endogenous denitrification (DPR-SNED). The anaerobic/anoxic/hypoxic durations and dissolved oxygen (DO) concentration were appropriately controlled, and the nitrogen and phosphorus removal characteristics were examined. The experimental results demonstrated that, in the anaerobic/hypoxia operation mode, with an anaerobic duration of 3 h and DO concentration of 0.5-1.0 mg·L^-1, the simultaneous nitrification of phosphorus removal (SNEDPR) system successfully began in 60 d. The effluent PO₄^3--P concentration was below 0.5 mg·L^-1, the nutrient and COD removal efficiencies were stably maintained above 90% and 80%, respectively, and the SNED efficiency and COD_ins efficiency reached 70% and 95%, respectively. When the operation mode was anaerobic/anoxic/hypoxic and nitrate-containing sewage was added at the beginning of the anoxic stage, DPR-SNED was achieved with the effluent PO₄^3--P concentration<0.5 mg·L^-1, nutrient and COD removal efficiencies above 88% and 90%, respectively, and SNED efficiency and COD_ins efficiency maintained at 62% and 90%, respectively. After the successful initiation of DPR-SNED, enhanced intracellular carbons storage was achieved by phosphorus-and glycogen-accumulating organisms using the limited carbons in raw municipal wastewater to provide sufficient carbon sources for subsequent nutrient removal. In addition, the endogenous partial denitrification ensured the efficient nitrogen removal performance of the DPR-SNED system at low C/N conditions (average 4).

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