| 分段进水两级A/O工艺对白酒废水的强化处理效果 |
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| 引用本文： | 罗景阳,操家顺,谢坤,章钦,虞筠霄.分段进水两级A/O工艺对白酒废水的强化处理效果[J].环境科学研究,2018,31(9):1612-1619. |
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| 作者姓名： | 罗景阳 操家顺 谢坤 章钦 虞筠霄 |
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| 作者单位： | 1.河海大学, 浅水湖泊综合治理与资源开发教育部重点实验室, 江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金项目（No.51708171）；中央高校基本业务费（No.2017B01514）；河海大学浅水湖泊综合治理与资源开发教育部重点实验室开放基金（No.2013/B1602020402） |
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| 摘 要： | 为有效控制白酒废水中高质量浓度NH4+-N对A/O系统冲击引起的出水水质超标问题，分析比较单级A/O工艺和分段进水两级A/O工艺进水时间（以min计）分配比为7:3]对白酒废水的处理效果.结果表明:与单级A/O工艺相比，分段进水两级A/O工艺出水中ρ（NH4+-N）、ρ（NO2--N）、ρ（NO3--N）和ρ（CODCr）均显著降低，其平均去除率分别提高了16.9%、43.2%、49.7%和8%.分段进水两级A/O工艺的二次进水能够为短程硝化反硝化的进行提供有效碳源和NH4+-N等，为NO2--N和NO3--N等去除提供了有利条件；同时，它通过促进对系统内碳源的利用以及NO2--N的去除，进一步降低了出水中ρ（CODCr）.此外，分段进水两级A/O工艺通过降低NH4+-N和NO2--N等污染物质量浓度，也能有效减弱其对氨氧化菌和亚硝酸盐氧化菌等微生物的抑制作用，为后续好氧阶段含氮污染物的去除奠定基础.但是，分段进水两级A/O工艺对白酒废水中PO43-的去除效果有限，这主要是因为第二阶段的NO2--N存在使反应系统处于缺氧环境，同时在碳源不充足的情况下，导致聚磷微生物释磷不充分，降低了第二好氧段的吸磷动力.研究显示，分段进水两级A/O工艺能够有效强化白酒废水中三态氮和CODCr的降解去除.
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| 关 键 词： | 白酒废水 NH4+-N 单级A/O 分段进水两级A/O |
| 收稿时间： | 2017/12/30 0:00:00 |
| 修稿时间： | 2018/4/17 0:00:00 |
Effects of Step Feed Two-Stage A/O Process on the Enhancement of Liquor Wastewater Treatment |
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| LUO Jingyang,CAO Jiashun,XIE Kun,ZHANG Qin and YU Yunxiao.Effects of Step Feed Two-Stage A/O Process on the Enhancement of Liquor Wastewater Treatment[J].Research of Environmental Sciences,2018,31(9):1612-1619. |
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| Authors: | LUO Jingyang CAO Jiashun XIE Kun ZHANG Qin and YU Yunxiao |
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| Affiliation: | 1.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China2.College of Environment, Hohai University, Nanjing 210098, China3.Jiangsu Institute of Urban Planning and Design, Nanjing 210098, China4.Wanjiang University of Technology, Maanshan 243031, China |
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| Abstract: | In order to prevent the shock load of high concentration of NH4+-N on A/O system, the comparisons of single A/O process and step feed two-stage A/O process (the ratio of influent volume during the two feeds was 7:3) on the treatment of liquor wastewater with high NH4+-N were conducted. The concentration of NH4+-N, NO2--N, NO3--N and CODCr in the effluents was efficiently reduced by the step feed two-stage A/O process. The removal efficiencies were respectively enhanced by 16.9%, 43.2%, 49.7% and 8% comparing with that in single A/O process. The reasons could firstly attribute to the supplements of required carbon sources and NH4+-N for the short-cut nitrification and denitrification in the secondary feed, which was beneficial to the removal of NO2--N and NO3--N. Meanwhile, the efficient utilization of carbon sources and the removal of NO2--N also contributed to the reduction of CODCr in the effluents. Moreover, the step feed two-stage A/O process could also relieve the inhibitory effects of NH4+-N and NO2--N on the microbial activities of ammonia oxidizing bacteria and nitrite-oxidizing bacteria, which was superior to the further removal of NH4+-N in aerobic process of the second A/O stage. However, the step feed two-stage A/O process had little effects on the removal of PO43-. The accumulation of NO2--N in the secondary A/O stage made the reactor into anoxic state. It would result in the inadequate release of phosphorus and then reduce the potential of phosphorus uptake by phosphorus-accumulating bacteria in oxic condition. The results indicated that the step feed two-stage A/O process could remarkably enhance the removal efficiency of typical pollutants (NH4+-N, NO2--N, NO3--N and CODCr) in liquor wastewater. |
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| Keywords: | liquor wastewater NH4+-N single A/O process step feed two-stage A/O process |
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