Microbial electricity-driven anaerobic phenol degradation in bioelectrochemical systems  

作　　者：Shixiang Dai Falk Harnisch Micjel Chávez Morejòn Nina Sophie Keller Benjamin Korth Carsten Vogt 

机构地区：[1]Department of Environmental Microbiology,Helmholtz Centre for Environmental Research GmbH-UFZ,Leipzig,Germany [2]Department of Isotope Biogeochemistry,Helmholtz Centre for Environmental Research GmbH-UFZ,Leipzig,Germany

出　　处：《Environmental Science and Ecotechnology》2024年第1期40-47,共8页环境科学与生态技术（英文）

基　　金：China Scholarship Council(CSC201804910500)for 4-year granting study abroad;supported by the Helmholtz Association in the frame of the Integration Platform“Tapping nature's potential for sustainable production and a healthy environment”at the UFZ.

摘　　要：Microbial electrochemical technologies have been extensively employed for phenol removal.Yet,previous research has yielded inconsistent results,leaving uncertainties regarding the feasibility of phenol degradation under strictly anaerobic conditions using anodes as sole terminal electron acceptors.In this study,we employed high-performance liquid chromatography and gas chromatography-mass spectrometry to investigate the anaerobic phenol degradation pathway.Our findings provide robust evidence for the purely anaerobic degradation of phenol,as we identified benzoic acid,4-hydroxybenzoic acid,glutaric acid,and other metabolites of this pathway.Notably,no typical intermediates of the aerobic phenol degradation pathway were detected.One-chamber reactors(t0.4 V vs.SHE)exhibited a phenol removal rate of 3.5±0.2 mg L^(-1) d^(-1),while two-chamber reactors showed 3.6±0.1 and 2.6±0.9 mg L^(-1) d^(-1) at anode potentials of t0.4 and t 0.2 V,respectively.Our results also suggest that the reactor configuration certainly influenced the microbial community,presumably leading to different ratios of phenol consumers and microorganisms feeding on degradation products.

关 键 词：Microbial electroremediation GEOBACTER Extracellular electron transfer Anaerobic phenol degradation Microbial syntrophy 

分 类 号：O646[理学—物理化学]