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 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.

PDF全文下载地址:

https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20190237&flag=1&journal_id=hjkx&year_id=2019