平行平板理论模型和多相混合模型的计算结果均表明：（1）随着气、液流量的增大，生物膜滴滤塔降解甲苯的净化效率均降低。
The results of parallel plat plates model and the multiphase mixture model both show that: (1) the purification efficiency of trickling biofilter reduces as the gas or liquid flux increasing.
采用滤膜重量法测定净化效率。
The purifying efficiency is mensurated with weight filter method.
另外，固相萃取柱填料的粒度对净化效率和试验周期也有重要影响。
In addition, particle size of packing material in SPE column also has important influence on the purification efficiency and test cycle.
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