發(fā)布時間：2018-08-24 14:38

【摘要】：潛流濕地內部污染物的降解是由系統(tǒng)內物理、化學及生物等反應共同作用的復雜過程,各反應的動力學過程是決定潛流濕地污染物去除效率的主要因素。根據(jù)潛流濕地植物、基質以及微生物的特性,研究潛流濕地內部主要污染物的降解機理和發(fā)生的生物及化學動力學過程并分析討論溫度、p H、溶解氧等不同因素對污染物降解效果的影響,對潛流濕地COD、NH3-N、TN和TP的降解效果進行動力學模擬,建立動力學模擬方程。結果總結如下:溫度、pH及溶解氧對潛流濕地污染物降解有重要影響。綜合考慮,潛流濕地降解COD、NH3-N、TN和TP的最適宜溫度為10~35℃;最適宜p H為6.5~8.0;厭氧區(qū)溶解氧濃度小于0.2mg/L,好氧區(qū)溶解氧范圍為1.5~2.5mg/L。水平—鋼渣和水平—火山巖兩種潛流濕地對COD、NH3-N、TN和TP降解效果均滿足一級反應動力學特點,其中水平—鋼渣潛流濕地對COD、NH3-N、TN和TP的一級反應動力學線性模擬的相關系數(shù)R2分別為0.9732、0.9640、0.9600和0.9912,水平—火山巖潛流濕地對COD、NH3-N、TN和TP的一級反應動力學線性模擬的相關系數(shù)R2分別為0.9641、0.9365、0.9709和0.9662,各擬合曲線的擬合度較高,說明一級反應動力學模型是對潛流濕地的設計及運行具有很好的參考價值的數(shù)學模型。
[Abstract]:The degradation of pollutants in the subsurface flow wetland is a complex process of physical, chemical and biological reactions in the system. The kinetic process of each reaction is the main factor to determine the removal efficiency of pollutants in the subsurface flow wetland. According to the characteristics of subsurface wetland plants, substrates and microbes, The degradation mechanism of main pollutants in subsurface flow wetland and the biological and chemical kinetic processes were studied, and the effects of temperature, dissolved oxygen and other factors on the degradation of pollutants were analyzed and discussed. The degradation effect of COD,NH3-N,TN and TP in subsurface flow wetland was simulated and the kinetic simulation equation was established. The results are summarized as follows: temperature pH and dissolved oxygen play an important role in the degradation of pollutants in subsurface flow wetlands. The optimum temperature for degradation of COD,NH3-N,TN and TP in subsurface flow wetland is 1035 鈩，

本文編號：2201123