| HRT对改良式A2/O-BAF反硝化除磷脱氮的影响 |
| 摘要点击 2250 全文点击 991 投稿时间：2019-07-19 修订日期：2020-01-10 |
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| 中文关键词 水力停留时间(HRT) 反硝化除磷概率密度 ΔPO43-/ΔNO3--N 污泥活性 COD物料守恒 |
| 英文关键词 hydraulic retention time(HRT) denitrifying phosphorus removal probability density ΔPO43-/ΔNO3--N sludge activity formula of material balance for COD |
| 作者 | 单位 | E-mail | | 赵凯亮 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | 1297798061@qq.com | | 刘安迪 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | | | 南彦斌 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | | | 梁利民 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | | | 王云霞 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | | | 陈永志 | 兰州交通大学环境与市政工程学院, 兰州 730070
甘肃省污水处理行业技术中心, 兰州 730070 | 476411589@qq.com |
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| 中文摘要 |
| 研究HRT（水力停留时间）对改良式A2/O-BAF双污泥系统反硝化除磷脱氮的影响.进水COD、NH4+-N和TP分别为189.6、60.4和5.1mg·L-1，HRT分别为9、8、7和6 h时，COD出水平均浓度均小于42mg·L-1，NH4+-N出水平均浓度分别为2.4、2.8、3.3和6.5mg·L-1，TP出水平均浓度分别为0.3、0.4、0.7和0.8mg·L-1；系统缺氧段反硝化聚磷菌占聚磷菌的比例（DPAOs/PAOs）从76.8%递减到48.8%；HRT为8 h时，通过数理统计方法得出反硝化除磷脱氮比（ΔPO43-/ΔNO3--N）的概率密度高达37.5%，缺氧段ΔPO43-/ΔNO3--N为1.24（理论值1.41），此时反硝化脱氮除磷效果最佳；在整个试验过程中SVI值均低于100 mL·g-1，而MLVSS/MLSS从0.74逐渐下降到0.63，表明污泥活性逐渐降低. |
| 英文摘要 |
| The effect of hydraulic retention time (HRT) on denitrifying phosphorus and nitrogen removal in a modified two sludge A2/O-BAF system was studied. The influent COD, NH4+-N, and TP were 189.6, 60.4, and 5.1 mg·L-1, respectively. When HRT was 9, 8, 7, and 6 h, the average effluent COD was less than 42 mg·L-1. The average effluent NH4+-N levels were 2.4, 2.8, 3.3, and 6.5 mg·L-1, respectively. The average effluent TP values were 0.3, 0.4, 0.7, and 0.8 mg·L-1, respectively. The ratio of the denitrifying phosphorus accumulation organisms (DPAOs/PAOs) in the system of anoxic zone was reduced from 76.8% to 48.8%. When HRT was 8 h, the ratio of denitrifying phosphorus to nitrogen (ΔPO43-/ΔNO3--N) was increased by 37.5% by a mathematical statistics method. The ΔPO43-/ΔNO3--N in the anoxic zone was 1.24 (the theoretical value is 1.41). At this time, the effect of denitrifying phosphorus to nitrogen was the best. The SVI value was lower than 100 mL·g-1 throughout the experiment, and the MLVSS/MLSS gradually decreased from 0.74 to 0.63, indicating that the sludge activity was reduced. |
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