Biogas biological desulfurization is a new technology developed in the 1990s. It has been widely studied abroad and has made great progress in application.
Biogas biological desulfurization technology includes biofiltration, biosorption and trickle filtration. The three systems are open systems, and their microbial populations change with environmental changes. In the process of biogas biological desulfurization, the oxidized sulfur-containing pollutants need to be removed by biological reduction to produce sulfide or H2S, and then by biological oxidation to produce elemental sulfur. In most bioreactors, microorganisms are mainly bacteria, followed by fungi, and there are few yeasts. The commonly used bacteria are Thiobacillus ferrooxidans, Thiobacillus denitrificans and Thiobacillus excretors of the genus Thiobacillus. The successful representative is Thiobacillus ferrooxidans, whose growth pH is 2.0 ~ 2.2.
Wet desulfurization of Biogas
Wet desulfurization of biogas can be divided into physical absorption method, chemical absorption method and oxidation method. Physical and chemical methods have the problem of hydrogen sulfide reprocessing. The oxidation method uses alkaline solution as absorbent and oxygen carrier as catalyst to absorb H2S and oxidize it into elemental sulfur. The wet oxidation method dissolves the desulfurizer in water, and the liquid enters the equipment and mixes with biogas. Hydrogen sulfide (H2S) in biogas reacts with the liquid to produce elemental sulfur. The liquids that absorb hydrogen sulfide include sodium hydroxide, calcium hydroxide, sodium carbonate Ferrous sulfate, etc. With mature oxidation desulfurization method, the desulfurization efficiency can reach more than 99.5%.
The above is a detailed introduction of biogas biological desulfurization and biogas desulfurization technology and methods. I hope it can help you. If you have any questions, please contact us. We will provide services for you with a professional attitude https://www.hneee.net