分段进水对深层床潮汐流人工湿地硝化-反硝化性能的影响

发布时间：2018-06-09 11:16

本文选题：人工湿地 + 深层床　；参考：《水处理技术》2016年11期

【摘要】：为了克服传统人工湿地占地面积大、TN去除率低的问题,采用深层床潮汐流人工湿地系统处理生活污水。结果表明,未分段进水条件下(水力负荷为0.42 m~3/(m~2·d)),COD和NH4~+-N平均去除率分别为82.28%和98.28%;分段进水条件下(水力负荷0.53 m~3/(m~2·d)),COD与NH_4~+-N均去除率分别为67.10%和99.48%。随着分段进水的设置,出水TN的质量浓度平均由53.22 mg/L降低至19.23 mg/L,平均去除率由33.74%升高至70.77%;在设置分段进水点的第2级人工湿地单元,硝化速率由14.40 g/(m~3·d)提高至38.39 g/(m~3·d),反硝化速率由2.79 g/(m~3·d)提高至20.96 g/(m~3·d)。在工况2条件下,每处理1 m3的生活污水需要的占地面积为1.88 m~2,仅为传统人工湿地占地面积的12.37~18.80%。
[Abstract]:In order to overcome the problem of low TN removal rate in traditional constructed wetland, the deep bed tidal flow constructed wetland system is used to treat domestic sewage. The results show that the average removal rates of COD and NH4 ~ -N are 82.28% and 98.28% respectively under the condition of no subsection influent (hydraulic load is 0.42 m~3/(m~2), and the removal rates of COD and NH4- N are 67.10% and 99.48% respectively under the condition of subsection influent (hydraulic load of 0.53 m~3/(m~2 / d) and NH _ 4 ~ -N, respectively. The concentration of TN in effluent decreased from 53.22 mg / L to 19.23 mg / L, and the average removal rate increased from 33.74% to 70.77%. The nitrification rate increased from 14.40 g/(m~3 d to 38.39 g/(m~3 dL, and the denitrification rate increased from 2.79 g/(m~3 d) to 20.96 g/(m~3 dl. Under the condition of working condition 2, the area required for each treatment of 1 m3 domestic sewage is 1.88 mm2, which is only 12.37 ~ 18.80% of the traditional constructed wetland area.
【作者单位】：西安建筑科技大学环境与市政工程学院;
【基金】：高等学校博士学科点专项科研基金(20116120110008) 国家水体污染控制与治理科技重大专项(2009ZX07212-002-004-003)
【分类号】：X799.3

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