RT info:eu-repo/semantics/article T1 Reducing carbon footprint in high H2S emissions: A synergistic microalgal-bacterial solution for sugarcane biorefineries A1 Do Vale Borges, André A1 Torres Franco, Andrés Felipe A1 Zamariolli Damianovic, Márcia Helena Rissato A1 Muñoz Torre, Raúl K1 Biogas upgrading K1 Vinasse circular bioeconomy K1 CO2 sequestration K1 Hydrogen sulfide removal K1 Microalgal-bacterial system K1 3308 Ingeniería y Tecnología del Medio Ambiente AB Sugarcane vinasse, a major by-product of ethanol production, poses environmental and health risks due to itshigh sulfate content, promoting severe hydrogen sulfide (H2S) formation (up to 50,000 ppmv) during acidogenicfermentation. The resulting H2S and high carbon dioxide (CO2) levels in off-gas create serious hazards, oftenleading to conventional desulfurization systems’ clogging and high maintenance. This study is the first toinvestigate a Chloroidium-based combined microalgal-bacterial (CMB) system for simultaneous, high-strengthH2S abatement and CO2 sequestration from these challenging vinasse fermentation off-gas streams. Utilizing a14 L bubble column photobioreactor under increasing gas flow conditions, the system achieved 100 % H2S and98.2 % CO2 removal efficiencies within 72 h, with a maximum H2S elimination capacity of 30.3 gS-H2S m⁻3 h⁻1.A comprehensive sulfur mass balance revealed that up to 99 % of theoretical sulfate was consumed by theconsortium for biomass growth, demonstrating efficient sulfur valorization. Performance was sustained byelevated dissolved oxygen (averaging 15.0 g L 1), ensuring complete H2S oxidation to sulfate without inhibitory PB Elsevier SN 0304-3894 YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/78577 UL https://uvadoc.uva.es/handle/10324/78577 LA eng NO Journal of Hazardous Materials, 2025, vol. 496, p. 139539 NO Producción Científica DS UVaDOC RD 14-oct-2025