生物滴滤塔去除有机硫恶臭的多尺度过程耦合机制和协同优化研究

受限于复杂的颗粒床层结构和多尺度传质-反应耦合特性，实现生物滴滤塔（BTF）内强疏水性、难降解的有机硫恶臭气体的稳定高效去除仍有诸多关键科学问题亟待解决。本项目以BTF去除甲硫醚为代表的有机硫恶臭为研究对象，采用实验、理论建模及数值模拟相结合的研究方法，分别从单颗粒尺度、颗粒群堆积尺度和反应器尺度对其去除过程展开研究。揭示单颗粒孔结构调控的甲硫醚内扩散传质与降解反应的耦合机制；研究颗粒群堆积特征调控的气-液两相流动、相间传质与颗粒内扩散传质-反应过程的相互作用机制。在此基础上，建立多尺度耦合的甲硫醚传质-降解反应动力学模型，通过对多尺度过程进行综合调控和协同优化研究，实现整个BTF内传质与反应的匹配和甲硫醚的稳定高效去除。本项目研究结果将推进基于BTF技术的有机硫恶臭污染控制的工业化进程，并促进化学工程和环境工程等学科交叉点的发展。

Due to the complex granular bed structure and multi-scale mass transfer-reaction coupling characteristics, there are still many key scientific problems to be solved to achieve the stable and efficient removal of highly hydrophobic and refractory organic sulfur odors in biotrickling filter (BTF). In this project, BTF will be employed to remove organic sulfur odor represented by dimethyl sulfide. The methods of experiment, theoretical modeling and numerical simulation will be used to study the removal process of dimethyl sulfide from single particle scale, particle group accumulation scale and reactor scale. The coupling mechanism of diffusion mass transfer and degradation of dimethyl sulfide controlled by single particle pore structure will be revealed. The interaction mechanism of gas-liquid two-phase flow, interphase mass transfer and internal diffusion mass transfer-reaction will be studied. On this basis, a multi-scale coupled mass transfer-degradation kinetic model of dimethyl sulfide will be established. The stable and efficient removal of dimethyl sulfide will be achieved by the comprehensive regulation and collaborative optimization of multi-scale process. The research results will promote the industrialization process of BTF based odor control of organic sulfur, and promote the development of interdisciplinary points of chemical engineering and environmental engineering.