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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >How do hydraulic load and intermittent aeration affect pollutants removal and greenhouse gases emission in wastewater ecological soil infiltration systems?
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How do hydraulic load and intermittent aeration affect pollutants removal and greenhouse gases emission in wastewater ecological soil infiltration systems?

机译：液压负荷如何影响污染物去除和温室气体排放废水生态土壤渗透系统？

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摘要

This study investigated the effects of hydraulic load and intermittent aeration on matrix oxygen concentration, COD removal, NH4+-N removal, TN removal, TP removal, greenhouse gases (GHGs) emission and functional gene abundances in wastewater ecological soil infiltration systems (WESISs). Intermittent aeration created aerobic conditions above 40 cm depth and did not change anaerobic conditions below 70 cm depth, which enhanced the abundances of bacteria and functional genes related to organic matter and nitrogen removal and improved COD, NH4+-N, TN and TP removal compared with non-aeration. The pollutants removal efficiencies, CO2 conversion efficiency decreased and N2O conversion efficiency increased with hydraulic load increasing in the non-aeration WESIS. COD, NH4+-N, TP removal efficiencies and CO2 conversion efficiency decreased in the intermittent aeration WESIS when hydraulic load increased. As hydraulic load increased from 0.05 to 0.4 m/d, TN removal efficiency first increased and then decreased in the intermittent aeration WESIS. However, N2O conversion efficiency first decreased and then increased. Intermittent aeration WESIS achieved high removal efficiencies of 89.4%, 90.8%, 87.2%, 92.9% for COD, NH4+-N, TN, TP, high conversion efficiency of 92.8% for CO2 and low conversion efficiency of 0.19% for N2O at hydraulic load of 0.2 m/d. Intermittent aeration and hydraulic load had hardly any effects on CH4 emission.
机译：本研究研究了废水生态土壤渗透系统（Wesiss）中的液压载荷和间歇曝气对基质氧浓度，COD去除，NH 4 + -N的去除，TN去除，TP去除，温室气体（GHG）发射和功能基因丰富。间歇性曝气在40厘米的深度以上产生了有氧条件，并且没有改变低于70厘米深度的厌氧条件，其增强了与有机物质和氮气除去的细菌和功能基因的丰富，并改善了COD，NH4 + -N，TN和TP比较了非曝气。污染物去除效率，二氧化碳转化效率降低，N2O转换效率随着非曝气Wesis中的液压载荷增加而增加。当液压负荷增加时，鳕鱼，NH4 + -N，TP去除效率和CO2转换效率降低。随着液压负荷从0.05增加到0.4m / d，TN去除效率首先增加，然后在间歇曝气受曝气量下降。然而，N2O转换效率首先降低，然后增加。间歇性曝气WESS达到89.4％，90.8％，87.2％，92.9％的鳕鱼，NH4 + -N，TN，TP，CO 2的高转化效率为92.8％，低转化效率为0.19％，对于液压负荷，N2O的低转化效率为0.19％ 0.2 m / d。间歇通气和液压负荷几乎没有对CH4发射的任何影响。

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