Microbial synergies drive simultaneous biodegradation of ethoxy and alkyl chains of Nonylphenol Ethoxylate in fluidized bed reactors

被引：2

作者：

Dornelles H.S. ^{[1
,2
]}

Sabatini C.A. ^{[1
]}

Adorno M.A.T. ^{[1
]}

Silva E.L. ^{[3
]}

Lee P.-H. ^{[2
]}

Varesche M.B.A. ^{[1
]}

机构：

[1] Department of Hydraulics and Sanitation, School of Engineering, University of São Paulo, Av. João Dagnone – 1100, São Carlos, São Paulo

[2] Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, Imperial College Road, England, London

[3] Department of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luiz, Km 235, SP 310, São Carlos, São Paulo

来源：

Chemosphere | 2024年 / 358卷

基金：

巴西圣保罗研究基金会;

关键词：

DIET; Fumarate; Geobacter; Methanobacterium; Oxidative phosphorylation; Surfactant;

D O I：

10.1016/j.chemosphere.2024.142084

中图分类号：

学科分类号：

摘要：

The widely-used surfactant Nonylphenol Ethoxylate (NPEO) produces endocrine-disrupting compounds during biodegradation, with these byproducts being more harmful than untreated NPEO. This study investigates the effectiveness of a Fluidized Bed Reactor (FBR) in reducing the production of 4-Nonylphenol (4-NP) during the biodegradation of NPEO. Two identical FBR filled with sand were used to assess the NPEO degradation and to enhance the microbial consortia capable of breaking down the complex byproducts, ethanol and fumarate were introduced as co-substrates. Our findings demonstrate the significant potential of the FBR, especially when coupled with fumarate, for enhancing the surfactant degradation. It outperforms the efficiency achieved with ethanol as the primary electron donor, albeit with a higher rate of byproduct production. Microbial community taxonomy and metabolic prediction revealed the high abundance of Geobacter (1.51–31.71%) and Methanobacterium (1.08–13.81%) in non-conductive sand. This may hint a new metabolic interaction and expand our understanding of Direct Interspecies Electron Transfer (DIET) in bioreactors applied to micropollutants degradation. Such an intricate relationship between facultative and anaerobes working together to simultaneously biodegrade the ethoxy and alkyl chains presents a new perspective on NPEO degradation and can potentially be extended to other micropollutants. © 2024

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