木屑生物膜处理H_2S气体研究

BIOLOGICAL ELIMINATION OF HYDROGEN SULFIDE

采用木屑为载体固定微生物处理含H2S废气.微生物经活性污泥驯化得到.结果表明:木屑为载体固定微生物不需要长时间的挂膜时间.生物滤池启动后的48 h内进气浓度迅速提高到641 mg/m3,H2S的去除率达到了100％.实验测定了不同容积负荷下H2S的处理率,当容积负荷为360 g(H2S)/(m3d)时,H2S气体的去除率可以稳定在97.4％以上.最后采用Michaelis-Menten关系式对H2S的去除速率进行了宏观动力学分析,计算得出半饱和因子Ks为242.75 mg/m3,最大表观去除率Vm为833.33 g(H2S)/(m3d).

Microorganisms, which were obtained from enriched sludge, were immobilized on wood chips to eliminate hydrogen sulfide in waste gas. The results showed that the hydrogen sulfide removal efficiency could reach as high as 100% when the inlet hydrogen sulfide concentration raised 641 mg/m3 within 48 hours right after the biofilter was packed. The effect of different volumetric loading on the hydrogen sulfide removal efficiency was detected. When the volumetric loading was as high as 360 g (H2S)/(m d) , the removal efficiency of the biofilter could maintain above 97. 4%. At last, Ks and Vm were quantified through Michaelis-Menten equation. The score of Ks was 242. 75 mg/m3 and Vm is 833. 33 g. Fig 5, Tab 2, Ref 8