Biohydrogen upgradation and wastewater treatment in 3-chambered bioelectrochemical system assisted with H2/O2-based redox reactions.
J Environ Manage
; 368: 122209, 2024 Sep.
Article
em En
| MEDLINE
| ID: mdl-39180821
ABSTRACT
The current need for the upgradation of biohydrogen generation and contaminant removal in two-chambered microbial electrolysis cells (MECs) compels the design of alternatives i.e. bioelectrochemical systems (BESs) to conventional reactors. In this study, a novel three-chambered design of MEC (BES-1) was developed with a common anodic chamber and a two-cathodic chambers at both ends of the anodic chamber, separated by a membrane (MEC-MEC). To facilitate electricity recovery, a microbial fuel cell (MFC) was integrated with an MEC in BES-2. Cathodic hydrogen recovery of 8.89 and 4.81 mL/L.day, and organic matter removal of 82% and 76% were obtained in BES-1 and BES-2, respectively, demonstrating their capabilities for bioremediation. Electrochemical analyses also revealed that cathodic reduction reactions improved with the effective utilization of protons during integration. Our design regulates H2/O2-associated electrochemical reactions and is beneficial for maintaining pH equilibrium. From cost and energy perspectives, the integrated BES provides a platform for two different reactions simultaneously and is capable of boosting overall hydrogen recovery and organic matter removal. Moreover, the compactness and competitiveness of such an integrated BES increase its scope for real-world applications.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxirredução
/
Fontes de Energia Bioelétrica
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Águas Residuárias
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Hidrogênio
Idioma:
En
Revista:
J Environ Manage
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Índia
País de publicação:
Reino Unido