H2S oxidation coupled to nitrate reduction in a two-stage bioreactor: Targeting H2S-rich biogas desulfurization
| Autor: | Flor de María Cuervo-López, Jaime Pérez-Trevilla, Guillermo Quijano, Germán Buitrón, Mauricio Flores-Cortés |
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| Rok vydání: | 2021 |
| Předmět: |
Packed bed
Denitrification 020209 energy 02 engineering and technology 010501 environmental sciences Pulp and paper industry 01 natural sciences Anoxic waters Flue-gas desulfurization Denitrifying bacteria chemistry.chemical_compound Nitrate chemistry Biogas 0202 electrical engineering electronic engineering information engineering Bioreactor Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Waste Management. 120:76-84 |
| ISSN: | 0956-053X |
| Popis: | A two-stage bioreactor operated under anoxic denitrifying conditions was evaluated for desulfurization of synthetic biogas laden with H2S concentrations between 2500 and 10,000 ppmv. H2S removal efficiencies higher than 95% were achieved for H2S loads ranging from 16.2 to 51.9 gS mliquid−3h−1. Average H2S oxidation performance (fraction of S-SO42− produced per gram of S-H2S absorbed) ranged between 8.2 ± 1.2 and 18.7 ± 5.3% under continuous liquid operation. Nitrogen mass balance showed that only 2–6% of the N-NO3− consumed was directed to biomass growth and the rest was directed to denitrification. Significant changes in the bacterial community composition did not hinder the H2S removal efficiency. The bioreactor configuration proposed avoided clogging issues due to elemental sulfur accumulation as commonly occurs in packed bed bioreactors devoted to H2S-rich biogas desulfurization. |
| Databáze: | OpenAIRE |
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