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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tetrabromobisphenol A (TBBPA) anaerobic biodegradation occurs during acidogenesis

Full text
Author(s):
Macedo, Williane Vieira [1] ; Duarte Oliveira, Guilherme Henrique [1] ; Zaiat, Marcelo [1]
Total Authors: 3
Affiliation:
[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
Total Affiliations: 1
Document type: Journal article
Source: Chemosphere; v. 282, NOV 2021.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 18/17744-6 - Combined system for the treatment of Tetrabromobisphenol a (TBBPA) by anaerobic digestion and advanced oxidative processes
Grantee:Williane Vieira Macêdo
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants