Implementation of in situ aerobic cometabolism for groundwater treatment: State of the knowledge and important factors for field operation

Skinner, Justin; Delgado, Anca G.; Hyman, Michael; Chu, Min-Ying Jacob

doi:10.1016/j.scitotenv.2024.171667

Cited by 2 publications

(2 citation statements)

References 156 publications

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“…TCE aerobic cometabolism has been implemented at contaminated groundwater sites by delivering gaseous (butane, propane) and liquid (toluene) organic primary substrates and O 2 /air into the subsurface. ,− A challenge for in situ application of aerobic cometabolism is microbial biomass accumulation or bioclogging near the delivery points of the growth-supporting substrates . For example, heterotrophic microorganisms consuming simple hydrocarbons have a biomass yield coefficient, Y , on the order of 0.42 g cells per g substrate. , Consequently, the growth of heterotrophic native and/or inoculated strains during aerobic cometabolism can cause biofouling and bioclogging of injection wells or adjacent areas. , Bioclogging reduces the soil porosity and permeability, which negatively affect substrate distribution in the subsurface and contaminant treatment efficacy.…”

Section: Introductionmentioning

confidence: 99%

“… 17 , 23 − 28 A challenge for in situ application of aerobic cometabolism is microbial biomass accumulation or bioclogging near the delivery points of the growth-supporting substrates. 29 For example, heterotrophic microorganisms consuming simple hydrocarbons have a biomass yield coefficient, Y , on the order of 0.42 g cells per g substrate. 30 , 31 Consequently, the growth of heterotrophic native and/or inoculated strains during aerobic cometabolism can cause biofouling and bioclogging of injection wells or adjacent areas.…”

Section: Introductionmentioning

confidence: 99%

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Acetylene Tunes Microbial Growth During Aerobic Cometabolism of Trichloroethene

Skinner,

Palar,

Allen

et al. 2024

Environ. Sci. Technol.

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Microbial aerobic cometabolism is a possible treatment approach for large, dilute trichloroethene (TCE) plumes at groundwater contaminated sites. Rapid microbial growth and bioclogging pose a persistent problem in bioremediation schemes. Bioclogging reduces soil porosity and permeability, which negatively affects substrate distribution and contaminant treatment efficacy while also increasing the operation and maintenance costs of bioremediation. In this study, we evaluated the ability of acetylene, an oxygenase enzyme-specific inhibitor, to decrease biomass production while maintaining aerobic TCE cometabolism capacity upon removal of acetylene. We first exposed propane-metabolizing cultures (pure and mixed) to 5% acetylene (v v–1) for 1, 2, 4, and 8 d and we then verified TCE aerobic cometabolic activity. Exposure to acetylene overall decreased biomass production and TCE degradation rates while retaining the TCE degradation capacity. In the mixed culture, exposure to acetylene for 1–8 d showed minimal effects on the composition and relative abundance of TCE cometabolizing bacterial taxa. TCE aerobic cometabolism and incubation conditions exerted more notable effects on microbial ecology than did acetylene. Acetylene appears to be a viable approach to control biomass production that may lessen the likelihood of bioclogging during TCE cometabolism. The findings from this study may lead to advancements in aerobic cometabolism remediation technologies for dilute plumes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acetylene Tunes Microbial Growth During Aerobic Cometabolism of Trichloroethene

Skinner,

Palar,

Allen

et al. 2024

Environ. Sci. Technol.

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Can bacteria and carbon-based nanomaterials revolutionize nanoremediation strategies for industrial effluents?

de Carvalho Lima,

Souza,

Aguiar

et al. 2024

Front. Nanotechnol.

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In this study, we delved into cutting-edge strategies for the effective management of wastewater, a critical issue exacerbated by industrial pollution and urban expansion. We introduce the use of carbon-based nanomaterials (CBNs), either alone or functionalized with bacteria, as a novel nanobiotechnological solution for urgent nanobioremediation needs. This technique is notable for its exceptional ability to remove various industrial pollutants, including heavy metals, pesticides, textiles, and dyes, emphasizing the pivotal role of CBNs. The development of bionanocomposites through the integration of CBNs with bacteria represents a significant advancement in enhancing bioremediation efforts. In this study, we assessed the potential health and environmental risks associated with CBN usage while offering an in-depth evaluation of the adsorption mechanisms and factors influencing bioremediation effectiveness. Furthermore, the improved efficiency in treating industrial effluents facilitated by bionanocomposites was investigated, and their alignment with circular economy principles through recyclability is discussed. We aimed to provide, a detailed overview of recent advancements, challenges, and prospects for CBNs and bacterial application in sophisticated wastewater treatment, underscoring their vital importance in promoting the environment.

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Implementation of in situ aerobic cometabolism for groundwater treatment: State of the knowledge and important factors for field operation

Cited by 2 publications

References 156 publications

Acetylene Tunes Microbial Growth During Aerobic Cometabolism of Trichloroethene

Acetylene Tunes Microbial Growth During Aerobic Cometabolism of Trichloroethene

Can bacteria and carbon-based nanomaterials revolutionize nanoremediation strategies for industrial effluents?

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