Comparison of Biogas Biodesulfurization, Dry Desulfurization, and Alkali Wash Desulfurization Processes
Aug 07, 2025
Anaerobic biogas requires desulfurization treatment to remove hydrogen sulfide from the biogas, in order to meet the requirements of back-end biogas utilization (boiler, power generation, purification).
Biogas desulfurization is the key and difficult point of biogas engineering: the traditional wet desulfurization process consumes a huge amount of alkali solution; Dry desulfurization requires regular replacement of fillers, which is time-consuming, labor-intensive, and dangerous. Biological desulfurization is the latest popular technology, which has been proven to be an effective technique for biogas desulfurization. A typical case shows that the comprehensive operating cost of biological desulfurization is less than 2 cents per cubic meter of biogas.
The commonly used methods for biogas desulfurization include dry desulfurization, alkali washing desulfurization, or biological desulfurization.
The process comparison of each desulfurization system is shown in the following table:
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