中文关键词碳氮比同步硝化内源反硝化 (SNED)反硝化除磷聚磷菌 (PAOs)反硝化聚糖菌 英文关键词C/N ratiosimultaneous nitrification-endogenous denitrification(SNED)denitrifying phosphorus removalphosphorous accumulating organisms(PAOs)denitrifying glycogen accumulating organisms

作者	单位	E-mail
都叶奇	青岛大学环境科学与工程学院, 青岛 266071	d_duyeqi@163.com
于德爽	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
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
唐鹏	青岛大学环境科学与工程学院, 青岛 266071
王钧	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
巩秀珍	青岛大学环境科学与工程学院, 青岛 266071
黄硕	青岛大学环境科学与工程学院, 青岛 266071
刘诚诚	青岛大学环境科学与工程学院, 青岛 266071

中文摘要 为了解同步硝化内源反硝化系统（SNEDPR）脱氮除磷性能，采用延时厌氧（180 min）/低氧（溶解氧0.5~2.0 mg·L^-1）运行的SBR反应器，以人工配置的模拟废水为处理对象，先采用恒定进水C/N（为10），以实现SNEDPR的启动和聚磷菌（PAOs）的富集培养，再调控进水C/N值（分别为10、7.5、5和2.5），考察不同C/N对系统的脱氮除磷性能的影响.结果表明，当进水C/N为10，可实现SNEDPR的启动与深度脱氮除磷，出水PO₄^3--P和总氮（TN）浓度分别平均为0.1 mg·L^-1和8.1 mg·L^-1，PO₄^3--P去除率、TN去除率和SNED率平均值分别为99.79%、89.38%和58.0%.当进水C/N由5提高至10时，系统维持良好的脱氮除磷性能，释磷量（PRA）和SNED率分别由16.0 mg·L^-1和48.0%提高至24.4 mg·L^-1和69.2%；当C/N为10时，TN和PO₄^3--P去除率最高达94.5%和100%；当C/N为2.5时，系统失去脱氮、除磷性能，PRA和SNED率仅为1.36 mg·L^-1和10%.在系统稳定运行阶段（C/N为10、7.5和5），SNED率达85.9%，出水NH₄⁺-N、NO_x^--N和PO₄^3--P浓度平均为0、8.1和0.1 mg·L^-1. 英文摘要 To determine the performance of nitrogen and phosphorus removal within a simultaneous nitrification endogenous denitrification system (SNEDPR), an extended anaerobic/low aerobic (dissolved oxygen:0.5-2.0 mg·L^-1)-operated sequencing batch reactor (SBR) was fed with simulation wastewater. The SBR was initiated under a constant influent C/N ratio of 10, with the simultaneous enrichment of polyphosphate-accumulating organisms (PAOs). It was then investigated at different influent C/N ratios of 10, 7.5, 5, and 2.5. The experimental results indicated that, when the influent C/N ratio was 10, SNEDPR could be successfully started up. The effluent PO₄^3--P and total nitrogen (TN) concentrations were 0.1 mg·L^-1 and 8.1 mg·L^-1. PO₄^3--P efficiency, TN efficiency, and SNED efficiency were 99.79%, 89.38%, and 58.0%, respectively. When the influent C/N ratio increased from 5 to 10, the nitrogen and phosphorus removal performance of the system improved with PRA, and SNED efficiency increased from 16.0 m·L^-1 and 48.0% to 24.4 mg·L^-1 and 69.2%, respectively. When the C/N ratio was 10, the TN and PO₄^3--P removal efficiencies increased to 94.5% and 100%, respectfully. When the C/N ratio was decreased to 2.5, the nitrogen and phosphorus removal performance of the system decreased. The PRA and SNED efficiencies were only 1.36 mg·L^-1 and 10%, respectively. During the stable phase of the system (C/N ratio were 10, 7.5 and 5), SNED efficiency reached to 85.9%, with the average effluent concentration of NH₄⁺-N, _x^--N, and PO₄^3--P being 0.0, 8.1, and 0.1 mg·L^-1, respectively.

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