垃圾填埋场覆盖材料改性污泥的甲烷氧化动力学  

Methane oxidation kinetics of bio-cover sewage sludge modified by coal ash for landfill

作　　者：王丹[1] 赵玲[2] 尹平河[1] 肖娟宜[1] 黄思明[1] 

机构地区：[1]暨南大学化学系,广东广州510632 [2]暨南大学环境工程系,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2012年第3期329-334,共6页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：国家自然科学基金资助项目(41076068);广东省科研培育与创新基金资助项目(21609509)

摘　　要：在实验室模拟条件下,以粉煤灰改性污泥为垃圾填埋场生物覆盖材料,分析了初始甲烷浓度、初始氧气浓度对甲烷氧化效率的影响,并测定了甲烷氧化动力学方程及动力学参数,旨在为材料实际工程应用提供理论依据.结果表明:初始CH4、O2浓度制约生物覆盖材料的甲烷氧化效率,初始CH4、O2浓度越高,材料甲烷氧化能力越强;甲烷氧化过程符合2级动力学方程-dV(CH4)/dt=kV(CH4)V(O2);利用Michaelis-Menten模型得出覆盖层材料的最大氧化速率Vmax为2.54μmol g-1h-1,半速常数Km为0.49μmol.In this study, laboratory-scale experiments were carried out to examine the effects of initial methane and oxygen contents on methane oxidation efficiency in landfill bio-cover sewage sludge, and the kinetic equation and corresponding parameters were also determined, aiming to provide scientific basis for the practical engineering application. The results showed that the methane and oxygen contents strongly affected the methane oxidation efficiency. The higher methane and oxygen contents resulted in stronger methane oxidation efficiency. The kinetics of methane oxidation was - dV（ CH4 ）/dt = kV（ CH4 ） V（ O2 ）,which fit the second-order reaction. As calculated from Miehaelis-Menten equation, the largest methane oxidation rate （ Vmax） was 2. 54 μmol g- 1 h - 1, and the half saturation constant （ Km） was found at 0. 49μmol.

关 键 词：生物覆盖材料 消化污泥 粉煤灰 甲烷氧化 动力学 

分 类 号：X705[环境科学与工程—环境工程]