摘要
研究生物滴滤法间接催化氧化脱除H_2S气体的动力学特性。基于吸收反应的双膜理论和生物膜理论,可以将H_2S的脱除过程视为传质与氧化吸收的串联过程,而该过程又与Fe^(2+)在生物膜内的传质及生化反应过程存在并联关系。通过分析得出液膜内H_2S浓度分布模型及生物膜内Fe^(2+)浓度分布简化数学模型。本研究得到的H_2S去除率模型可为生物滴滤法的工艺设计和应用提供理论依据。
The paper is mainly aimed at introducing its authors＇ kinetic model of indirect catalytic oxidation for H2S removal by biotrickling. The so-called bio-trickling is nothing but a new type of highly efficient biological process in treating H2S. As is known, microbial oxidation of ferrous iron can be used as an alternative method to produce ferric sulphate, a reagent used for removing H2S from biogas. On the basis of two-membrane and bio-membrane theory and the analysis on the mass transfer of H2S, it can be inferred that it would be possible to connect the reaction and the mass transfer of H2S in a series, which is supposed to be paralleledly connected with the bio- logical reaction and the mass transfer of Fe2. in bio-film. Therefore, the bio-membrane is an indirect system for H2S removal by causing Fe^3＋/Fe^2＋ transformation. In addition, the analysis and theoretical deduction may help to simplify the mathematic model of the distribution of H2S concentration in the liquid membrane, the kinetic model of H2S removal rate, and the distribution of Fe2＋ concentration. And, last of all, experimental results prove that the calculating results of H2S removal rate are in full accord with those of experiments. The model of H2S removal rate proves more practical and is expected to provide a theoretical guideline for the bio-trickling process design and its application.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2009年第4期38-40,共3页
Journal of Safety and Environment
关键词
环境工程
动力学模型
生物滴滤法
硫化氢
间接催化氧化
environmental engineering
kinetic model
bio-trick ling
hydrogen sulfide
indirect catalytic oxidation
