真菌降解挥发性有机物动力学模型研究

Study on dynamic model of fungi to VOCs treatment

真菌生物滤池对废气的净化过程,不涉及液膜扩散以及过渡区等问题,因此与传统的细菌生物滤池的净化过程不同.在对真菌生物滤池净化低浓度乙硫醇废气的过程机理进行研究的基础上,建立了真菌生物滤池处理挥发性有机化合物的动力学模型,分别推导出用以描述乙硫醇在生物膜内生化过程的方程式和用以描述气流方向乙硫醇浓度轴向变化的方程式,二者共同描述乙硫醇废气在真菌生物滤池中的传输与被生物分解的过程.通过对含不同浓度乙硫醇废气处理的试验验证,所建立的真菌降解乙硫醇模型的模拟结果与实测结果具有较好的一致性.

Because liquid film diffusion and transition zone are not involved in the waste gas purification process of a fungal biofilter, the process can be described by adsorption-degradation model. The theory of low concentration ethyl-mereaptan treated by fungal biofilter was studied. A dynamic model describing the VOCs＇ treating by the fungal biofilter was set up. The equations describing the biochemical reaction of ethyl-mercaptan in the biofilm and ethyl-mercaptan＇ s concentration change along the axis of the reactor were also inferred respectively. The model＇ s correction was validated by contrast the dynamic model with the practical process. The results show that the calculated values were close to the observed ones.