Abstract
Bio-electro-Fenton (BEF) systems have been potentially studied as a promising technology to achieve environmental organic pollutants degradation and bioelectricity generation. The BEF systems are interesting and constantly expanding fields of science and technology. These emerging technologies, coupled with anodic microbial metabolisms and electrochemical Fenton's reactions, are considered suitable alternatives. Recently, great attention has been paid to BEFs due to special features such as hydrogen peroxide generation, energy saving, high efficiency and energy production, that these features make BEFs outstanding compared with the existing technologies. Despite the advantages of this technology, there are still problems to consider including low production of current density, chemical requirement for pH adjustment, iron sludge formation due to the addition of iron catalysts and costly materials used. This review has described the general features of BEF system, and introduced some operational parameters affecting the performance of BEF system. In addition, the results of published researches about the degradation of persistent organic pollutants and real wastewaters treatment in BEF system are presented. Some challenges and possible future prospects such as suitable methods for improving current generation, selection of electrode materials, and methods for reducing iron residues and application over a wide pH range are also given. Thus, the present review mainly revealed that BEF system is an environmental friendly technology for integrated wastewater treatment and clean energy production.
Highlights
The population growth and the rapid development of industry and agriculture despite their numerous bene ts have caused problems for human societies and the environment
The results showed that 88.73% of ERY in the anode chamber, 100% erm B, 77.6% erm C, and 63.5% erm G as antibiotic-resistant genes (ARGs) in the cathode chamber of BEF system equipped with gFeOOH/carbon nanotubes (CNT)/stainless-steel-mesh composite electrode were decomposed under neutral pH in 48 h
The present review examined the BEF system efficiency in regard to the degradation and mineralization of environmental organic pollutants by reviewing most of the existing studies
Summary
The population growth and the rapid development of industry and agriculture despite their numerous bene ts have caused problems for human societies and the environment. In BEF systems, during the biological decomposition of organic carbon in the anode chamber by electro active microorganisms that produce electricity, the oxidation of environmental organic pollutants in the cathode chamber is done by Fenton-based reactions.[33,61,62] The BEF systems could have signi cant bene ts because of its unique features (Fig. 3).[53] In recent years, the feasibility of the BEF system to treat of a wide range of synthetic wastewaters, which contains a variety of environmental organic compounds, such as dyes,[63,64,65,66,67] industrial pollutants,[68,69,70] and pharmaceutical compounds[71,72,73] has been demonstrated. It is necessary to use new and developed BEF processes for practical applications.[62,103] different types of cathodic materials, anodic materials, membranes, and sources of iron catalysts will be introduced as important operational parameters affecting the performance of BEF system
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
