Effect of biostimulation and bioaugmentation on biodegradation of high concentrations of 1,4-dioxane

Ramos-García, Angel Alejandro; Walecka-Hutchison, Claudia; Freedman, David L.

doi:10.1007/s10532-022-09971-4

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…WD4H had a half-maximum-rate concentration of 5.3 mg-dioxane/L. This was about 1.2 to 30-fold lower than those of P. dioxanivorans BERK-1 (14.7 mg-dioxane/L) ( Ramos-García et al 2022 ), P. dioxanivorans CB1190 (6.3 to 160 mg-dioxane/L) ( Mahendra & Alvarez-cohen 2006 ; He et al 2017a ; Barajas-Rodriguez & Freedman 2018 ), Pseudonocardia sp. D17 (60 mg-dioxane/L) ( Sei et al 2013a ), and Pseudonocardia sp.…”

Section: Resultsmentioning

confidence: 89%

“…The net specific growth rates of the five cultures isolated in this study and two pure cultures from the literature are shown in Figure 3 . Pseudonocardia dioxanivorans CB1190 ( Barajas-Rodriguez & Freedman 2018 ) and Pseudonocardia dioxanivorans BERK-1 ( Ramos-García et al 2022 ) are the only pure cultures with a full set of kinetics in the literature and are used for comparison. P. dioxanivorans CB1190 has about 2- to 8-fold higher net specific growth rates at 1,4-dioxane concentrations ≥ 0.5 mg/L, while all the five strains in this study have about four times higher net specific growth rates at concentrations < 0.5 mg/L.…”

Section: Resultsmentioning

confidence: 99%

“… Net specific growth rates for 1,4-dioxane-metabolizing pure cultures isolated in this study and reported in the literature. Note: P. dioxanivorans CB1190 ( Barajas-Rodriguez & Freedman 2018 ) and P. dioxanivorans BERK-1 ( Ramos-García et al 2022 ) are the only pure cultures with a full set of kinetic parameters reported in the literature. …”

Section: Figure 1 ∣mentioning

confidence: 99%

“…About 20 bacterial strains ( Supporting Information Table S1 ) have been reported in the literature to use 1,4-dioxane as the sole carbon and energy source ( Parales et al 1994 ; Mahendra & Alvarez-Cohen 2005 , 2006 ; Kim et al 2009 ; Sei et al 2013a ; Huang et al 2014 ; Pugazhendi et al 2015 ; Chen et al 2016 ; Inoue et al 2016 ; Matsui et al 2016 ; He et al 2017b ; Barajas-Rodriguez & Freedman 2018 ; Inoue et al 2018 ; Yamamoto et al 2018 ; Tusher et al 2020 ; Ma et al 2021 ; Simmer et al 2021 ; Tusher et al 2021 ; Dai et al 2022 ; Ramos-García et al 2022 ). The majority of them are gram-positive bacteria that belong to the genera Pseudonocardia, Mycobacterium , and Rhodococcus .…”

Section: Introductionmentioning

confidence: 99%

“…These strains were enriched and isolated under high concentrations of 1,4-dioxane (i.e., 20 to 1,000 mg/L). Only a few strains’ 1,4-dioxane metabolism kinetics have been fully characterized ( Barajas-Rodriguez & Freedman 2018 ; Ramos-García et al 2022 ). There is a need to characterize the 1,4-dioxane metabolism kinetics of more cultures.…”

Section: Introductionmentioning

confidence: 99%

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Isolation and characterization of pure cultures for metabolizing 1,4-dioxane in oligotrophic environments

Tesfamariam,

Ssekimpi,

Hoque

et al. 2024

Water Science &Amp; Technology

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1,4-Dioxane concentration in most contaminated water is much less than 1 mg/L, which cannot sustain the growth of most reported 1,4-dioxane-metabolizing pure cultures. These pure cultures were isolated following enrichment of mixed cultures at high concentrations (20 to 1,000 mg/L). This study is based on a different strategy: 1,4-dioxane-metabolizing mixed cultures were enriched by periodically spiking 1,4-dioxane at low concentrations (≤1 mg/L). Five 1,4-dioxane-metabolizing pure strains LCD6B, LCD6D, WC10G, WCD6H, and WD4H were isolated and characterized. The partial 16S rRNA gene sequencing showed that the five bacterial strains were related to Dokdonella sp. (98.3%), Acinetobacter sp. (99.0%), Afipia sp. (99.2%), Nitrobacter sp. (97.9%), and Pseudonocardia sp. (99.4%), respectively. Nitrobacter sp. WCD6H is the first reported 1,4-dioxane-metabolizing bacterium in the genus of Nitrobacter. The net specific growth rates of these five cultures are consistently higher than those reported in the literature at 1,4-dioxane concentrations <0.5 mg/L. Compared to the literature, our newly discovered strains have lower half-maximum-rate concentrations (1.8 to 8.2 mg-dioxane/L), lower maximum specific 1,4-dioxane utilization rates (0.24 to 0.47 mg-dioxane/(mg-protein ⋅ d)), higher biomass yields (0.29 to 0.38 mg-protein/mg-dioxane), and lower decay coefficients (0.01 to 0.02 d−1). These are characteristics of microorganisms living in oligotrophic environments.

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