Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro 76230, Mexico.
Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.P. 09340 Mexico City, Mexico.
Waste Manag. 2021 Feb 1;120:76-84. doi: 10.1016/j.wasman.2020.11.024. Epub 2020 Dec 4.
A two-stage bioreactor operated under anoxic denitrifying conditions was evaluated for desulfurization of synthetic biogas laden with HS concentrations between 2500 and 10,000 ppm. HS removal efficiencies higher than 95% were achieved for HS loads ranging from 16.2 to 51.9 gS mh. Average HS oxidation performance (fraction of S-SO produced per gram of S-HS 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-NO consumed was directed to biomass growth and the rest was directed to denitrification. Significant changes in the bacterial community composition did not hinder the HS removal efficiency. The bioreactor configuration proposed avoided clogging issues due to elemental sulfur accumulation as commonly occurs in packed bed bioreactors devoted to HS-rich biogas desulfurization.
采用两段式生物反应器，在缺氧反硝化条件下，对浓度在 2500 至 10000ppm 之间的含 H2S 的合成沼气进行脱硫评估。在 H2S 负荷为 16.2 至 51.9 gS mh 时，H2S 的去除效率高于 95%。在连续液体操作下，H2S 氧化性能（每吸收 1 克 H2S-HS 产生的 S-SO 分数）平均在 8.2±1.2 和 18.7±5.3%之间。氮质量平衡表明，消耗的 N-NO 中只有 2-6%被用于生物量生长，其余的则用于反硝化。细菌群落组成的显著变化并没有阻碍 H2S 的去除效率。所提出的生物反应器构型避免了由于元素硫积累而导致的堵塞问题，这在专门用于富含 H2S 的沼气脱硫的填充床生物反应器中经常发生。
