| 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 1526 全文点击 615 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 |
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| 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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