| Texto completo | |
| Autor(es): |
Rogeri, Renan Coghi
;
Gomes, Kaio Gustavo
;
de Araujo, Matheus Neves
;
Borges, Andre do Vale
;
Gil-Garcia, Carolina
;
Damianovic, Marcia Helena Rissato Zamariolli
;
Zaiat, Marcelo
;
Fuess, Lucas Tadeu
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY; v. N/A, p. 25-pg., 2025-09-23. |
| Resumo | |
Sugarcane vinasse biodigestion presents challenges due to its sulfate-rich nature (2-3 g-SO42- L-1), causing microbial competition, inhibition, and H2S-rich biogas production. The high H2S content (up to 45,000 ppm) is considered a significant economic drawback for energy recovery purposes, mainly for the upgrading routes toward biomethane. Despite the potential benefits, the adoption of two-stage biodigestion faces obstacles because of high alkalinization costs. However, the fermentative-sulfidogenic process is promising by producing bicarbonate alkalinity as a by-product of the organic matter oxidation and consuming H+ ions through ionized sulfide generation. This pathway mitigates the need for expensive alkalinizing inputs and enhances the biogas energetic value (CH4 > 80%, H2S-free), providing favorable conditions for cost-effective and environmentally sustainable upgrading strategies. Moreover, the H2S- and CO2-rich biogas produced during the fermentative-sulfidogenic stage must be addressed from an environmental perspective as an "off-gas", enabling promising biotechnological routes for sulfur and biogenic CO2 recovery. Although significant progress has been made at laboratory scale, further understanding is needed regarding the role of the fermentative-sulfidogenic step as a biological alkalinity source for methanogenesis. In parallel, developing low-cost and environmentally advantageous strategies to support sulfidogenic activity remains critical. This review elucidates the fermentative-sulfidogenic pathway's central role in vinasse biodigestion, highlighting its dual potential for biogas upgrading and recovery of valuable by-products such as elemental sulfur and biogenic CO2. [GRAPHICS] (AU) | |
| Processo FAPESP: | 22/10615-1 - Consolidação do conceito de biorrefinaria aplicado ao tratamento biológico de águas residuárias e de resíduos sólidos |
| Beneficiário: | Marcelo Zaiat |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 23/10733-7 - Digestão Anaeróbia da Vinhaça de Cana-De-Açúcar em Duas Fases: Estratégias de Alcalinização e o Papel do Processo Fermentativo-Sulfetogênico |
| Beneficiário: | Renan Coghi Rogeri |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |