HOUDun,ZHOUXia-hai.Application of Biological and Simultaneous Regeneration Dry Desulfurization in Biogas Treatment[J].China Water & Wastewater,2022,38(14):25-32.
Application of Biological and Simultaneous Regeneration Dry Desulfurization in Biogas Treatment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第14期
Page:
25-32
Column:
Date of publication:
2022-07-17
- Keywords:
- digestion biogas; hydrogen sulfide; bio-desulfurization; dry desulfurization; simultaneous regeneration
- Abstract:
- The biogas produced during the municipal sludge digestion process usually contains a small quantity of H2S, which has a great harm and must be removed before the utilization of biogas. The development history of biogas desulfurization for sludge digestion in our country is reviewed, suggesting that the development and application of new desulfurization technologies as well as the improvement in traditional process shall be both paid attention to. For a considerable sized sludge digestion project, the combined treatment process of bio-scrubbing with alkalinity regeneration and simultaneous regeneration dry desulfurization was proposed for biogas desulfurization. For the case investigated in this work, with a biogas production of more than 48 000 m3/d, the inlet H2S concentration was 4 125-7 425 mg/m3. After the bio-desulfurization unit, it showed that the H2S content was less than 27 mg/m3 and corresponding removal efficiency was more than 99%. As a result, no H2S was detected after the dry desulfurization. In consideration of the so high H2S removal rate by the bio-desulfurization process, it was therefore recommended that, when the effluent biogas of bio-desulfurization could meet the related requirements of gas equipment, crossover dry desulfurization can be adopted as an emergency operation method. This strategy could further reduce the desulfurization cost and extend the replacing period of dry desulfurization mass.
Last Update:
2022-07-17