| 改良UCT分段进水工艺处理生活污水性能优化研究 |
| 摘要点击 3213 全文点击 1990 投稿时间：2010-08-29 修订日期：2010-10-27 |
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| 中文关键词 分段进水 进水流量分配 脱氮除磷 同步硝化反硝化 反硝化除磷 UCT |
| 英文关键词 step feed inflow distribution ratios nitrogen and phosphorus removal simultaneous nitrification and denitrification (SND) denitrifying phosphorus removal University of Cape Town(UCT) |
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| 中文摘要 |
| 在某大型污水处理厂采用中试规模的改良UCT分段进水脱氮除磷工艺处理低COD/N生活污水，重点研究了流量分配比和原水营养元素比（COD/N、COD/P和TN/P）对工艺脱氮除磷性能的影响，目的是分析探索工艺对有机物和氮磷去除机制和污泥特性.连续运行试验表明，该工艺取得稳定高效的去除性能.在进水COD负荷为0.79～0.93 kg/(m3·d)，4种流量分配比条件下，平均出水COD浓度和去除率分别为（43.7±8.35）mg/L和（83.8±3.86）%，且厌氧区和缺氧区对COD的去除贡献高达60.2%～76.2%.进水流量分配为40%∶30%∶30%时可获得88.2%的总氮去除率，其中通过好氧同步硝化反硝化去除的占32.8%，出水氨氮（NH+4-N）和总氮（TN）为（0.21±0.20）mg/L和（7.90±1.27）mg/L.约占32.6%～39.5%的反硝化聚磷菌对系统实现高达97.2%的磷去除率有着重要作用.氮去除率与原水COD/N在4.64～7.41范围内呈线性正比关系（R2=0.96），磷去除率分别随原水COD/P和TN/P在35.0～92.5和6.24～12.5范围内增加而增加（R2=0.87和R2=0.89）.系统平均SVI值为（82.6±4.99）mL/g，污泥沉降性能良好. |
| 英文摘要 |
| A pilot-scale modified UCT step feed process was proposed to treat the municipal wastewater with lower COD/N in a large-scale wastewater treatment plant. Effects of influent distribution ratios and nutrients ratios (COD/N、COD/P and TN/P) on nutrients removal capabilities were importantly investigated. The removal mechanisms of organics and nutrients and sludge characteristics were ultimately discussed. According to the continuous experiments, the stable and high process performance was obtained. The average COD removal efficiencies and effluent concentration of （83.8±3.86）% and （43.7±8.35）mg/L were achieved in the influent COD loading of 0.79-0.93 kg/(m3·d). The COD removal in anaerobic and anoxic zones accounted for 60.2%-76.2%. With the influent distribution ratio of 40%∶30%∶30%, as much as 88.2% of TN removal efficiency was observed. It should be considered the removal of 32.8% through simultaneous nitrification and denitrification process. The average effluent NH+4-N and TN were （0.21±0.20）mg/L and （7.90±1.27）mg/L, respectively. It was extremely important that as much as 32.6%-39.5% of the denitrifying phosphorus accumulation organisms contributed to the high phosphorus removal efficiency of 97.2%. A linear positive relationship was observed between nitrogen removal efficiency and COD/N in the range of 4.64 and 7.41 (R2=0.96). Phosphorus removal efficiency was found to be a function of the influent COD/P and TN/P, varying from 35.0 to 92.5 and from 6.24 to 12.5, respectively (R2=0.87 and R2=0.89). In addition, the great sludge settleability was obtained with the mean SVI of (82.6±4.99) mL/g. |
