Benzene removal by a novel modification of enhanced anaerobic biostimulation

Xiong, Wenhui; Mathies, Chris; Bradshaw, Kris; Carlson, Trevor; Tang, Kimberley; Wang, Yi

doi:10.1016/j.watres.2012.06.036

Cited by 34 publications

(14 citation statements)

References 33 publications

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“…10 d). These findings corroborate well with few other previous studies where a reduction of toxicity was observed following anaerobic treatment of petroleum hydrocarbon contaminated wastewater (Xiong et al, 2012;Cooper et al, 2010;Bautista et al, 2009;Nipper et al, 2005). Toxicity data together with other experimental evidence provided earlier in sections 3.1.1 and 3.1.3 further demonstrate the effectiveness of this novel tubular MFC in the in situ treatment of petroleum hydrocarbons especially in deep aquifers with contaminated groundwater.…”

Section: Toxicity Reduction During Mfc Operationsupporting

confidence: 91%

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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Bioelectrochemical systems could have potential for bioremediation of contaminants either in situ or ex situ. The treatment of a mixture of phenanthrene and benzene using two different tubular microbial fuel cells (MFCs) designed for either in situ and ex situ applications in aqueous systems was investigated over long operational periods (up to 155 days). For in situ deployments, simultaneous removal of the petroleum hydrocarbons (>90% in term of degradation efficiency) and bromate, used as catholyte, (up to 79 %) with concomitant biogenic electricity generation (peak power density up to 6.75 mWm -2 ) were obtained at a hydraulic retention time (HRT) of 10 days. The tubular MFC could be operated successfully at copiotrophic (100 ppm phenanthrene, 2000 ppm benzene at HRT 30 days) and oligotrophic (phenanthrene and benzene, 50 ppb each, HRT 10 days) substrate conditions suggesting its effectiveness and robustness at extreme substrate concentrations in anoxic environments. In the MFC designed for ex situ deployments, optimum MFC performance was obtained at HRT of 30 h giving COD removal and maximum power output of approximately 77% and 6.75 mWm -2 respectively. The MFC exhibited the ability to resist organic shock loadings and could maintain stable MFC performance. Results of this study suggest the potential use of MFC technology for possible in situ/ex situ hydrocarbon-contaminated groundwater treatment or refinery effluents clean-up, even at extreme contaminant level conditions.

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Section: Toxicity Reduction During Mfc Operationsupporting

confidence: 91%

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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“…During BTEX degradation, it has been reported that nitrate, sulfate, and phosphate were important ingredients to accelerate the degradation process . To correlate their relationship to the growth rate in terms of biomass of P. fluorescens during catechol degradation, phenotype analysis was performed.…”

Section: Resultsmentioning

confidence: 99%

Reconstruction and analysis of a three‐compartment genome‐scale metabolic model for Pseudomonas fluorescens

Huang

Lin

2020

Biotech and App Biochem

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With the versatile metabolic diversity, Pseudomonas fluorescens is a potential candidate in petroleum aromatic hydrocarbon (PAH) bioremediation. Genome‐scale metabolic model (GSMM) can provide systematic information to guide the development of metabolic engineering strategy to improve microbial activity. In this study, a GSMM for P. fluorescens SBW25 was reconstructed, which is termed as lCW1057. The reconstruction was based on automatic reannotation and manual curation. The periplasmic compartment was constructed to better represent the proton gradient profile. The reconstructed proton transport chain has a P/O (ATP generated per atom oxygen consumed by the respiratory chain) ratio of 11/8. Flux balance analysis (FBA) was performed to explore the whole‐cell metabolic flow. The model suggested that instead of Embden–Meyerhof–Parnas pathway, Entner–Doudoroff pathway was used in glycolytic metabolism of P. fluorescens, indicating that the growth of P. fluorescens is more energy dependent. Furthermore, P. fluorescens can use nitrate as the terminal electron acceptor for the glucose metabolism. The β‐ketoadipate pathway was involved in catechol metabolism. The uptake of oxygen is mandatory for the aromatic ring cleavage. The in silico and in vitro maximum specific growth rate was compared, resulting in 10% difference when catechol was used as the sole carbon source.

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“…There are several biomolecular techniques available to identify microbes in consortia and to ascertain the degradation of xenobiotic compounds. We are now able to understand the degradation processes of most commonly used xenobiotics including polyaromatic hydrocarbons (PAHs), e.g., naphthalene (Alquati et al 2005), benzene (Xiong et al 2012), chrysene and benzo(a)pyrene (Hesham et al 2012). For a successful bioremediation, knowledge of factors influencing the biological as well as physicochemical processes is must.…”

Section: Resultsmentioning

confidence: 99%

Advances in microbial bioremediation and the factors influencing the process

Srivastava

Naraian

Kalra³

et al. 2013

Int. J. Environ. Sci. Technol.

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Irrational and rapid global human societal development has culminated to a condition of environmental deterioration. Accidental leakage and deliberate use of organic and inorganic chemicals have contaminated the environment up to the level of ecosystem. Advancements have been made in the field of research on bioremediation of the hazardous contaminants especially in last three decades. Microbial bioremediation has been the most understood biotechnological process of environmental restoration. Bacteria and fungi because of their inherent ability to adapt and grow in extreme environments have been employed for either removal or degradation of the chemical contaminants. Researchers all over the world are getting breakthroughs in finding new bacterial strains having plasmid linked degradation/ reduction ability. Molecular biology and genetic engineering helped in crafting the microbes for the desired results on environment. Despite having favorable conditions, microbial remediation largely depends on environmental factors and on the basic biological characters of microbes, especially bacteria being Grampositive or Gram-negative. Metagenomic studies revealed the importance of microbial ecology as microbes work well in community, i.e., consortia. This review along with several other studies suggests the need of precision during microbial community identification, substrate specificity and the designing of microbes.

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Benzene removal by a novel modification of enhanced anaerobic biostimulation

Cited by 34 publications

References 33 publications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Reconstruction and analysis of a three‐compartment genome‐scale metabolic model for Pseudomonas fluorescens

Advances in microbial bioremediation and the factors influencing the process

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