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后置短程反硝化AOA-SBR工艺实现低C/N城市污水的脱氮除磷
摘要点击 179  全文点击 78  投稿时间:2018-07-07  修订日期:2018-07-16
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中文关键词  同步短程硝化反硝化(SPND)  内源短程反硝化  强化生物除磷(EBPR)  聚磷菌(PAOs)  城市污水
英文关键词  simultaneous partial nitrification-endogenous denitrification (SPND)  endogenous partial denitrification  enhanced biological phosphorus removal (EBPR)  phosphorous accumulating organisms (PAOs)  urban sewage
作者单位E-mail
巩秀珍 青岛大学环境科学与工程学院, 青岛 266071 G_gongxiuzhen@163.com 
于德爽 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  
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  
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  
都叶奇 青岛大学环境科学与工程学院, 青岛 266071  
中文摘要
      为了解厌氧/好氧/缺氧(A/O/A)运行的序批式反应器(SBR)中,强化生物除磷(EBPR)与同步短程硝化反硝化(SPND)耦合,并后置短程反硝化的脱氮除磷特性,以低C/N(≤ 4)城市污水为处理对象,通过优化曝气量和缺氧时间,实现了低C/N城市污水的深度脱氮除磷.结果表明,当好氧段曝气量由1.0 L·min-1降至0.6 L·min-1,缺氧时间为180 min时,出水PO43--P浓度由0.06 mg·L-1降至0,出水NH4+-N、NO2--N和NO3--N浓度分别由0.18、18.79和0.08 mg·L-1逐渐降低至0、16.46和0.05 mg·L-1,TN去除率由72.69%提高至77.97%;随着曝气量的降低,SPND现象愈加明显,SND率由19.18%提高至31.20%;此后,当缺氧段时间由180 min逐渐延长至420 min,出水PO43--P、NH4+-N和NO3--N浓度分别维持在0、0和0.03 mg·L-1左右,出水NO2--N低至3.06 mg·L-1,SND率达32.21%,TN去除性能逐渐提高,TN去除率高达99.42%,实现了系统的深度脱氮除磷.
英文摘要
      This study focuses on the investigation of the nitrogen (N) and phosphorus (P) removal characteristics of a combination of enhanced phosphorus removal (EBPR) with simultaneous partial nitrification endogenous denitrification (SPND) and post-partial denitrification process. An anaerobic/aerobic/anoxic (A/O/A) operated sequencing batch reactor (SBR) fed with urban sewage was optimized by regulating the aeration rate and anoxic time. Based on this optimization, deep-level nitrogen and phosphorus removals from low C/N urban sewage could be realized. The experimental results show that the effluent PO43--P concentration decreased from 0.06 mg·L-1 to 0 mg·L-1, the effluent NH4+-N, NO2--N, and NO3--N concentrations gradually decreased from 0.18, 18.79, and 0.08 mg·L-1 to 0, 16.46, and 0.05 mg·L-1, respectively, and the TN removal efficiency increased from 72.69% to 77.97% when the aeration rate decreased from 1.0 L·min-1 to 0.6 L·min-1 and the anoxic duration was 180 min. With the reduction of the aeration rate, the SPND phenomenon became notable and the SND rate increased from 19.18% to 31.20%. When the anoxic duration was extended from 180 min to 420 min, the effluent PO43--P, NH4+-N, and NO3--N concentrations stabilized at~0, 0, and 0.03 mg·L-1, respectively. The effluent NO2--N concentration was as low as 3.06 mg·L-1, the SND rate was~32.21%, the TN removal performance gradually improved, and the TN removal efficiency was as high as 99.42%. Thus, deep-level nitrogen and phosphorus removals could be realized with the SPNDPR-PD system.

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