Biological desulfurization method of biogas

Abstract

The invention discloses a biological desulfurization method of biogas. The biological desulfurization method of the biogas comprises the following steps of: preparing a nutrient stock solution from compound fertilizer, urea and water, mixing liquid which contains a microbial strain with the nutrient stock solution evenly so as to obtain a nutrient solution, and spraying the nutrient solution circularly into a desulfurization tower so as to achieve propagation of the microbial strain in the nutrient solution; detecting the content of hydrogen sulfide in the biogas at an outlet in the desulfurization tower, and gradually regulating the amount of the biogas introduced from an inlet until the content of hydrogen sulfide at the outlet end of the desulfurization tower meets a technical index when the flow of the inlet biogas reaches a maximum, wherein the nutrient solution already contains enough microorganisms at the time; and conducting water supplement on the desulfurization tower, and supplementing oxygen to the desulfurization tower; when the number of the microorganisms in the nutrient solution reaches a standard, no addition of the microbial strain is needed, and the microorganisms can reproduce by themselves in the nutrient solution, so that self-sufficiency is achieved; in addition, sulphuric acid is generated by hydrogen sulfide and oxygen in the biogas under the catalysisaction of the microorganisms, so that hydrogen sulfide is separated from the biogas, formation of sulphur dioxide through biogas combustion is avoided, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of environmental protection pollution treatment, in particular to a method for removing sulfur in biogas. Background technique [0002] In the process of sewage treatment or other industrial production, combustible gases, such as biogas, are produced. Energy is stored in the combustible gas, which can be used for power generation, etc., to save energy, but the combustible gas contains hydrogen sulfide. If the combustible gas is directly burned, Sulfur dioxide will be generated, which will cause great pollution to the environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a biogas desulfurization method capable of removing sulfur in the biogas before combustion and utilization. [0004] In order to solve the above-mentioned technical problems, the technical solution of the present invention is: biogas biological desulfurization method, comp...

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Problems solved by technology

[0002] In the process of sewage treatment or other industrial production, combustible gases, such as biogas, are produced. Energy is stored in the combustible gas, which can be used for power generation, etc., to save energy, but the combustible gas contains hydrogen sulfide. If the combustible gas is directly burned, Sulfur dioxide will be produced, which will cause great pollution to the environment

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