生物过滤塔降解BTEX行为的研究  

Biodegradation Behavior of Benzene,Toluene,Ethylbenzene and Xylene by Biological Filtration

作　　者：王宝庆[1] 马广大[2] 王莉[2] 吴卫军[2] 邹君峰[2] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]西安建筑科技大学环境工程与市政工程学院,陕西西安710055

出　　处：《农业环境科学学报》2005年第z1期273-276,共4页Journal of Agro-Environment Science

基　　金：陕西省教育厅专项科研计划(01JK186);南开大学人事处科研启动基金(J02012)

摘　　要：以陶粒为填料,对生物过滤塔降解BTEX的行为进行了研究。结果表明,在不同氮源浓度条件下,4种物质的生物降解程度不同,生物降解最优的氮源浓度为2.0 g.L-1,而且也表明苯系物中碳原子数与生物降解程度的关系。通过对BTEX生物降解反应平衡方程的分析,得出有机物体积去除负荷与降解过程所产生的CO2之间基本上存在线性关系,并得出了线性回归方程。通过试验数据对反应平衡方程的各系数进行了计算,结果表明Pc/Lr近似为一常数,Pc/Lr的试验值与挥发性有机物完全氧化(不考虑生物量产生)时的计算值相比要小。比较4种挥发性有机物的生物降解反应平衡方程的系数可以看出,BTEX的反应路径相似。An experimental investigation on purification of BTEX waste gas was conducted in a biofilter packed with ceramic pellets.Degradation of BTEX by biological filtration reached optimal removal values in the nitrogen concentration of 2.0g·L^(-1).The removal values varied with different number of carbon atoms in the VOCs.The alignment of the four series of points illustrated a linear relationship between BTEX consumption and CO_2 production,and least square linear regressions were obtained.The ratios Pc/Lr were nearly constant for the four VOCs.The experimentally determined ratios were less than the ratios corresponding to those for complete oxidation.Comparison of the stoichiometric coefficients related to each VOCs indicated that there existed reaction similarities between the four VOCs.

关 键 词：生物过滤塔 尿素 BTEX 平衡方程 

分 类 号：X701[环境科学与工程—环境工程]