土壤石油生物降解影响因子正交实验分析

石油污染物进入土壤之后，多种因素同时制约着污染物的生物降解，为了定量化各因素对彼此的影响，探求促进正向作用，抑制负向作用的途径，为各因素制定适宜的施用时间顺序以及施用量，以最大限度地加快降解速度，笔者设计了本文中的复合生物降解实验，结果表明，使用多因素复合处理方法可以在土壤石油处理中收到很好的效果，在土壤石油含量为64g/kg水平下，三周内的降解率可以高达48％，在实验初期，表面活性剂和氧化剂的投加是影响降解速率的重要因素，它们的最优水平均为各受试水平中的最大值，到了实验的中后期，污染强度上升为降解的首要影响因子，并且在受试样品范围内，污染度越大降解率越高。

Impact factors on the Bioremediation of Oil in Soil

Many factors govern the bioremediation of oil in soil.The author designed an experiment so that the interaction between the factors,the methods to maximize biodegradation and the optimal time order of the factors could be determined.The results went as follow,surfactant and oxidant were the most important factors in the early stage and their optimal dosages were both the biggest level under test.While for the intermediate and terminal stage,pollutant concentration became the most important factor and large degradation ratio came with bigger concentration.