| 水力负荷对地下渗滤系统微生物分布及N2O释放的影响 |
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| 引用本文： | 段玉龙, 李英华, 李海波, 季现超, 余艳艳. 水力负荷对地下渗滤系统微生物分布及N2O释放的影响[J]. 环境工程学报, 2016, 10(11): 6431-6438. doi: 10.12030/j.cjee.201506173 |
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| 作者姓名： | 段玉龙 李英华 李海波 季现超 余艳艳 |
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| 作者单位： | 1.沈阳大学环境学院, 沈阳 110044; 2.东北大学资源与土木工程学院, 沈阳 110004 |
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| 基金项目： | 国家自然科学基金资助项目（41571455，51578115） 中央高校基本科研业务费专项（N140105003） |
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| 摘 要： | 通过实验室模拟实验，分析了进水水力负荷对污水地下渗滤系统脱氮微生物分布及N2O气体释放特征的影响。结果表明：随着水力负荷的升高，系统对COD、NH4+-N和TN等污染物的去除率呈下降趋势；不同深度基质层中硝化细菌数量随着水力负荷的增加而减少，靠近散水区变化最为明显，而反硝化细菌数量随水力负荷的增加而增加。在低水力负荷（≤0.12 m3·（m2·d）-1）和高水力负荷（≥0.28 m3·（m2·d）-1）时，生物脱氮作用产生N2O气体产率较低，平均值1.10 mg N2O·（m2·d）-1；在中等水力负荷（0.16 m3·（m2·d）-1）时，N2O气体的产率达到最大值（3.75±0.038）mg N2O·（m2·d）-1。综合考虑地下渗滤系统处理能力、除污效果以及N2O产率等多方面因素，建议在工程应用中，污水地下渗滤系统的进水水力负荷区间0.20~0.24 m3·（m2·d）-1。
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| 关 键 词： | 地下渗滤 水力负荷 脱氮微生物 N2O |
| 收稿时间： | 2015-07-18 |
Effects of hydraulic load on microbial distributions and N2O emissions in a subsurface infiltration system |
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| DUAN Yulong, LI Yinghua, LI Haibo, JI Xianchao, YU Yanyan. Effects of hydraulic load on microbial distributions and N2O emissions in a subsurface infiltration system[J]. Chinese Journal of Environmental Engineering, 2016, 10(11): 6431-6438. doi: 10.12030/j.cjee.201506173 |
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| Authors: | DUAN Yulong LI Yinghua LI Haibo JI Xianchao YU Yanyan |
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| Affiliation: | 1.School of Environmental, Shenyang University, Shenyang 110044, China:; 2.School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China |
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| Abstract: | The effects of influent hydraulic load on the distributions of nitrogen removing microbes and release of N2O in a subsurface infiltration system were analyzed through simulation experiments. The results show that the removal rates of COD, NH4+-N, TN, and other pollutants decreased with increasing influent hydraulic load. The number of nitrifiers at different depths decreased with increasing hydraulic load, especially near the distribution area. Conversely, the number of denitrifying bacteria at different depths showed a clear increasing trend. The productive rates of N2O are relatively low at conditions of low (≤ 0.12 m3·(m2·d)-1) and high (≥0.28 m3·(m2·d)-1) hydraulic load (average 1.10 mg N2O·(m2·d)-1). Maximum productive rate of N2O ((3.75±0.038)mg N2O·(m2·d)-1) was achieved at a hydraulic load of 0.16 m3·(m2·d)-1. Considering the treatment efficiency, pollutant removal rate, and N2O emission rate, the recommended hydraulic load ranges from 0.20 to 0.24 m3·(m2·d)-1 when a subsurface infiltration system is designed for engineering applications. |
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| Keywords: | subsurface infiltration hydraulic load nitrogen removal bacteria N2O |
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