Batch degradation of trichloroethylene using oleaginous Rhodococcus opacus in a two-phase partitioning bioreactor and kinetic study

Baskaran, Divya; Paul, Tanushree; Pakshirajan, Kannan; Krithivasan, Muthu; Devanesan, M.G.; Rajamanickam, Ravi

doi:10.1016/j.biteb.2020.100437

Cited by 6 publications

(5 citation statements)

References 45 publications

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“…However, the estimated maximum specific degradation rate and inhibitory concentration values due to these models do not correlate well with the experimentally determined values. Similar observations were reported by on the inhibitory effect of trichloroethylene on its biodegradation by Rhodococcus opacus [ 47 ].…”

Section: Resultssupporting

confidence: 90%

Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses

Kanaujiya

Chhantyal

et al. 2023

Bioengineered

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Phthalic acid esters (PAEs) are highly toxic compounds and can disrupt the hormonal balance of human, animal, and aquatic organisms. Due to the hazardous nature of such compounds, their removal from constituent wastewater before discharging into the environment is mandatory. This study focused on the biodegradation of dimethyl phthalates (DMP), di-n-butyl phthalates (DBP), and di-n-octyl phthalates (DnOP) by Gordonia sp. in a batch system. Initially, five different concentrations of DBP, DMP, and DnOP (200–1000 mg/L) were chosen individually as the sole carbon source to examine their effect on the biodegradation and biomass growth of Gordonia sp. Complete degradation of DBP and DMP was achieved up to 1000 mg/L initial concentration within 96 h, whereas in case of DnOP, the degradation value was only 83.5% at 120 h for the same initial concentration. The experimental data were fitted into various substrate inhibition kinetic models, and accurate predicted values of degradation of all the three PAEs were obtained using the Tiesser model in comparison with other models, which yielded the highest and lowest R 2 and SSE values of 0.99 and 0.02 × 10 −4 , respectively. In addition, the phytotoxicity of PAEs degraded samples was assessed and more than 50% germination index value was observed for DMP and DBP degraded sample which established the treatment efficiency of Gordonia sp. in degrading DMP and DBP. Hence, high DMP and DEP degradation and phytotoxicity removal efficiency of Gordonia sp. demonstrate its potential for the treatment of PAEs contaminated wastewater.

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Section: Resultssupporting

confidence: 90%

Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses

Kanaujiya

Chhantyal

et al. 2023

Bioengineered

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“…"k L a" refers to the local mass transfer coefficient and H is the partition coefficient between two phases, defined (Eq. [3][4][5][6][7][8][9].…”

Section: Model Equationsmentioning

confidence: 99%

“…TPPBs efficiency has already been proven in various applications [7][8][9][10][11][12]. Some studies focused on targeting parameters likely to reach high efficiencies, like temperature, phase volumetric ratio, microorganisms' concentration, or the selection of the organic phase [13,14].…”

Section: Introductionmentioning

confidence: 99%

A mathematical model for VOCs removal in a treatment process coupling absorption and biodegradation

Wantz

Kane

Lhuissier

et al. 2021

Chemical Engineering Journal

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“…Several techniques, such as catalytic oxidation [4,5] ; membrane separation [6,7] ; biofiltration [8,9] ; and advanced oxidation processes, namely, photocatalysis, [1] Fenton, [10] zerovalent iron, UV irradiation, etc., have been applied for the abatement of trichloroethylene (TCE) vapour in the air. The selection of the technology for any VOC treatment depends on its cost, operating conditions, and the physical and chemical properties of organic compounds.…”

mentioning

confidence: 99%

“…Due to the spillage, leakage, and transport of TCE, a large amount of VOCs is emitted into the atmosphere. [8,14,15] TCE is known to affect the respiratory, nervous, and immune systems of the body. It is potentially carcinogenic and can lead to liver and kidney damage.…”

mentioning

confidence: 99%

Equilibrium and thermodynamic study of trichloroethylene adsorption on activated carbon in a fluidized bed and its thermal regeneration

Nikam

Mandal

2022

Can J Chem Eng

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Volatile organic compounds (VOC), used as solvents in industries, are major sources of air pollution. Trichloroethylene (TCE) is a chlorinated VOC widely used in industries. TCE vapours are toxic in nature and adversely affect human health and the surrounding environment when exposed over the threshold limit value for a long duration. Adsorption of TCE vapours using activated carbon as an adsorbent in a fluidized bed and its thermal regeneration is a viable, effective, and economic technology for its separation from air. However, before designing such a system, the equilibrium and thermodynamic study of the adsorption of TCE vapour on activated carbon is important. In this study, the dynamic adsorption of TCE vapour was carried out in a fluidized bed using nitrogen as the carrier gas. The effect of operating conditions, including particle size of activated carbon (212–710 μm), flowrate of nitrogen (carrier gas), adsorption temperature (303–353 K), and the concentration of TCE vapour in nitrogen at the inlet (25–85 mg/L) on the adsorption capacity of TCE on the fluidized bed of activated carbon, was examined. The experimental results obtained were analyzed using the Langmuir and Freundlich adsorption isotherms. The thermodynamic study showed that the adsorption of TCE was spontaneous, exothermic, and physical in nature. The effect of regeneration temperature and purge gas flowrate on the renewal of used activated carbon was also studied.

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Batch degradation of trichloroethylene using oleaginous Rhodococcus opacus in a two-phase partitioning bioreactor and kinetic study

Cited by 6 publications

References 45 publications

Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses

Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses

A mathematical model for VOCs removal in a treatment process coupling absorption and biodegradation

Equilibrium and thermodynamic study of trichloroethylene adsorption on activated carbon in a fluidized bed and its thermal regeneration

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