Biodesulfurization technology of biogas includes biofiltration, biosorption and biotrickling filtration. The three systems are open systems, and their microbial populations change with the change of environment. In the biological desulfurization process of biogas, oxidized sulfur pollutants need to be first generated into sulfide or H2S through biological reduction, and then generated into elemental sulfur through biological oxidation process to be removed. In most bioreactors, microorganisms are mainly bacteria, fungi are secondary, and yeast is rare. The commonly used bacteria are Thiobacillus ferrooxidans, Thiobacillus denitrificans and Thiobacillus denitrificans. The most successful representative is Thiobacillus ferrooxidans, whose growth pH is 2.0~2.2.
The wet desulfurization of biogas can be divided into physical absorption method, chemical absorption method and oxidation method. The physical and chemical methods have the problem of hydrogen sulfide reprocessing. The oxidation method uses alkaline solution as the absorbent and oxygen carrier as the catalyst to absorb H2S and oxidize it into elemental sulfur. The wet oxidation method uses the desulfurizer to dissolve in water, the liquid enters the equipment and mixes with biogas. Hydrogen sulfide (H2S) in biogas reacts with the liquid to generate elemental sulfur and absorb hydrogen sulfide, including sodium hydroxide, calcium hydroxide, sodium carbonate Ferrous sulfate, etc. With mature oxidation desulfurization method, the desulfurization efficiency can reach above 99.5%.
The above is a detailed introduction to biogas desulfurization, and we hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional services https://www.hneee.net
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