Resorcinol as a highly efficient aromatic electron donor in bioelectrochemical system.
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| Title: | Resorcinol as a highly efficient aromatic electron donor in bioelectrochemical system. |
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| Authors: | Yang, Li-Hui1,2 (AUTHOR), Cheng, Hao-Yi1,3 (AUTHOR) chenghaoyihit@126.com, Zhu, Ting-Ting4 (AUTHOR), Wang, Hong-Cheng3 (AUTHOR), Haider, Muhammad Rizwan2 (AUTHOR), Wang, Ai-Jie2,3 (AUTHOR) |
| Source: | Journal of Hazardous Materials. Apr2021, Vol. 408, pN.PAG-N.PAG. 1p. |
| Subjects: | Resorcinol, Electron donors, Bioelectrochemistry, Energy dissipation, Microbial communities, Energy consumption |
| Abstract: | Bioelectrochemical systems (BESs) have been known as a promising technology for accelerating aromatic contaminants degradation and energy recovery. However, most existing studies concentrate on aromatics metabolized through a benzoyl-CoA pathway while those metabolized through other pathways are limited. In this work, resorcinol, a typical aromatic contaminant as well as a key central intermediate (other than benzoyl-CoA) involved in aromatics anaerobic biodegradation, was studied in BESs. Unlike the general impression of the relatively poor organic-to-current performance in the aromatics driven BESs, high efficiencies for resorcinol-fed BESs were observed with a current density and coulombic efficiency of up to 0.26 ± 0.05 mA cm−2 and 74.3 ± 10.7%, respectively. The higher performance likely correlates to the readily fermentable property of resorcinol. Analysis of microbial communities in the biofilm suggests a syntrophic interaction between resorcinol-degrading bacteria (RDB) and anode-respiring bacteria (ARB) was involved in current generation. Additional tests involving the removal of accumulated acetate through fast resorcinol feeding indicates that a mechanism based on direct utilization of resorcinol for current generation may also exist. This study extends the knowledge for the fate of aromatics in BESs and indicates that aromatics entering into the resorcinol metabolic pathway can be treated efficiently with good energy recovery efficiency in BESs. ga1 • Resorcinol was available as a substrate for electricity recovery in bioelectrochemical system. • The disparate biodegradation pathway for resorcinol contributed to a superior electricity performance. • A syntrophic interaction between resorcinol-degrading bacteria and anode-respiring bacteria played a main role. • A comprehension of electricity recovery from aromatics via the resorcinol metabolic pathway was supplemented. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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