Biogas biological desulfurization is a new technology developed in the 1990s. It is a new technology using microorganisms to realize the valence state conversion of sulfur under normal temperature and pressure. The process of biological desulfurization is to introduce a certain amount of air into the biogas containing hydrogen sulfide, and a large number of biological fillers are installed in the reactor, which provide sufficient space for bacterial reproduction. The circulation of nutrient solution keeps the packing moist and replenishes the nutrition needed for the growth and reproduction of bacteria. In the process of metabolism, Thiobacillus and Rhizobium absorb hydrogen sulfide and convert them into elemental sulfur and then sulfuric acid.
Biogas biological desulfurization is to use desulfurization bacteria to convert H2S into elemental sulfur or sulfite under certain temperature, humidity and micro oxygen conditions. The main reactions were as follows:
According to the different oxygen supply, the products are different: when the oxygen content is appropriate, reaction (1) occurs, and hydrogen sulfide is mainly converted into elemental sulfur; when oxygen is excessive, reaction (2) occurs, and hydrogen sulfide is mainly converted into sulfite. According to the above reaction, the type of product can be controlled by controlling oxygen supply and redox potential.
三、沼气生物脱硫的特点
3、 Characteristics of biogas biological desulfurization
1、率： 硫化氢去除率高达98.5%
1. High efficiency: removal rate of hydrogen sulfide is up to 98.5%
2、高适应范围： 可处理硫化氢浓度高达1.5% （15000ppm）
2. High application range: it can treat hydrogen sulfide concentration as high as 1.5% (15000ppm)
3、低成本： 与其它脱硫技术相比，运行成本
3. Low cost: compared with other desulfurization technologies, the operation cost is the lowest
4、高安全性: 无二次污染
4. High safety: no secondary pollution
5、无人值守： 系统通过在线监测系统全自动运行
5. Unattended: the system runs automatically through the online monitoring system
6、维护简单： 少量的维护工作
6. Simple maintenance: a small amount of maintenance work
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2020-09-18
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