摘要
在曝气生物滤池(BAF)系统中,按水力停留时间(HRT)4h,对盐度为0.5%(W/V)的采油废水进行处理,并利用GC-MS对废水中有机物的构成进行分析,结果表明:采油废水中有机污染物的主要构成是9种支链烷烃和18种直链烷烃,分布范围从正十三烷(C13H28)到正三十二烷(C32H66).由于降解中间产物的累积,出水中烷烃类物质所占比例降低,而芳香族物质比例上升.在采油废水中烷烃的存在下,PAHs中最易被微生物降解的是含有4个苯环、脂溶性强的■,降解效率达98.0%;而降解效果最差的为含有二个苯环、脂溶性较差的萘,降解效率仅为66.4%.
The experiments conducted under HRT = 4h and salinity of 0.5% （W/V） show satisfactory treatment effects on oil field wastewater by biological aerated filter （BAF） . Furthermore, the structures and degradation characteristics of organic substances in the wastewater were investigated using the GC-MS. The organic substances in influent are mainly composed of 9 kinds of branch-chain alkanes and 18 kinds of straight-chain alkanes ranged from tridecane （C13H28） to dotriacontane （C32H66） . The intermediates accumulated in the degradation process results in the rise of aromatic substances in effluent. Because of the existence of alkanes, the degradation efficiency of chrysene with 4 benzene rings could be up to 98. 0% ; However, the efficiency of naphthalene with 2 benzene rings and poor fat-solubility was found low to 66. 4%.
出处
《环境化学》
CAS
CSCD
北大核心
2007年第3期376-379,共4页
Environmental Chemistry
基金
北京大学第十三期大型仪器开放测试基金
关键词
曝气生物滤池
采油废水
多环芳烃
biological aerated filter, oil field wastewater, polycyclic aromatic hydrocarbons
