Tetrabromobisphenol A (TBBPA) anaerobic biodegradation occurs during acidogenesis

Autor(es)

Macedo, Williane Vieira ^[1] ; Duarte Oliveira, Guilherme Henrique ^[1] ; Zaiat, Marcelo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Res Dev & Innovat Environm Engn, Sao Carlos Sch Engn, Lab Biol Proc, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 282, NOV 2021.
• Citações Web of Science: 0

Resumo

This is the first study to bring evidence on the anaerobic biodegradation of TBBPA occurring during acidogenesis in domestic sewage at environmentally relevant concentrations by complex microbial communities. This was accomplished by continuously operating two anaerobic structured bed reactors (ASTBR) for over 100 days under acidogenic (Acidogenic Reactor, AR) and multistep methanogenic (Methanogenic Reactor, MR) conditions. In the AR, the temporal carbohydrates consumption and the acetic acid production were strongly correlated with TBBPA removal by the Pearson's test. The spatial concentration of TBBPA and carbohydrates along the MR and the kinetic degradation profiles corroborate the AR results. It is hypothesized that TBBPA biodegradation in the studied conditions occurs during acidogenesis via the cometabolism supported by non-specific enzymes and the metabolism (dehalorespiration) established by electrons donors such as H2, which are both produced during the macrocomponents breakdown in the early stages of the anaerobic digestion. The TBBPA mass balance showed that approximately 86.8 +/- 0.05% and 97 +/- 0.01% of the removed TBBPA was biodegraded in the AR and MR, respectively. Furthermore, TBBPA biodegradation went further than reductive debromination as total phenols were detected in the reactors' effluent. (AU)

• Processo FAPESP: 18/17744-6 - Sistema combinado para a degradação do Tetrabromobisfenol a (TBBPA) por digestão anaeróbia e processos oxidativos avançados
• Beneficiário: Williane Vieira Macêdo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático