铁炭法强化人工湿地深度处理外排焦化废水试验研究

焦化废水经常规二级生物处理后仍残留大量难降解有机物,其排放会对环境构成危害。本研究采用铁炭法强化人工湿地来深度处理外排焦化废水,考察其有机物处理效果并与砾石湿地进行对比。研究结果表明：HRT为5d时,铁炭法强化人工湿地对COD的平均去除率分别为24.35%,高于砾石人工湿地的9.25%,并将BOD5/COD比值从0.1提高到0.35,提高了可生化性;铁炭法强化人工湿地对酚类、含氮类、苯系物、卤代烃（醇）等典型难降解有机物均有良好的降解效果,有机物种类从进水的41种减少到出水的17种,而且含量均有大幅削减。

STUDY ON FE-C ENHANCED CONSTRUCTED WETLAND FOR ADVANCED TREATMENT OF DISCHARGED COKING WASTEWATER

The coking wastewater still contains quantities of refractory organics after common secondary biological treatment,which will do harm to the environment.The paper used Ferric-Carbon enhanced constructed wetland to treat the discharged coking wastewater to compare the effect with gravel wetland.The results showed that Ferric-Carbon enhanced constructed wetland(24.35%) achieved higher COD removal rate than gravel wetland(9.25%),and meanwhile increased BOD5/COD from 0.1 to 0.35;The Ferric-Carbon enhanced constructed wetland had good degradation effect on phenols,nitrogenous organics,benzene series,halohydrocarbon etc.,presented as the species of organics decreased from 41 to 17 with greatly content reduce.