Mass balance and kinetics of biodegradation of endocrine disrupting phthalates by Cellulosimicrobium funkei in a continuous stirred tank reactor system

Kanaujiya, Dipak Kumar; Pakshirajan, Kannan

doi:10.1016/j.biortech.2021.126172

Cited by 12 publications

(6 citation statements)

References 38 publications

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“…The following equation is the fundamental of mass balance: X input − X output = X acc/deg where X input is the input concentration, X output is the output concentration, and X acc/deg is the concentration after accumulation or degradation. A critical step in the biological treatment of organic substrate-containing wastewater is the mass balance of input and output concentrations of substrate, biomass, and dissolved oxygen . In the present study, concentration of biomass, dissolved oxygen (DO), and imidacloprid were considered for mass balance analysis.…”

Section: Resultsmentioning

confidence: 99%

“…The specific degradation rate for all of the initial concentrations was determined. To estimate the biokinetic parameters involved in imidacloprid degradation, the experimental data were subsequently fitted into various kinetic models, as presented in Table . − …”

Section: Methodsmentioning

confidence: 99%

“…A critical step in the biological treatment of organic substrate-containing wastewater is the mass balance of input and output concentrations of substrate, biomass, and dissolved oxygen. 28 In the present study, concentration of biomass, dissolved oxygen (DO), and imidacloprid were considered for mass balance analysis. The dry weight of biomass was used to conduct a stoichiometry analysis of imidacloprid biodegradation and biomass accumulation.…”

Section: Reactor Studymentioning

confidence: 99%

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Bioremediation of Imidacloprid in a Stirred Tank Reactor Using Bacterial Consortium: Kinetic Analysis and Toxicity Assessment

Tiwari

Tripathi

Mohan

et al. 2023

Ind. Eng. Chem. Res.

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Imidacloprid is an insecticide of systemic nature that exhibits an adverse impact on several non-target organisms. In the present study, potential bacteria have been isolated and used for biodegradation of imidacloprid in batch studies and stirred tank reactor. The optimum process condition for degradation has been found to be at pH 7, a temperature of 35 °C, and a shaking speed of 150 rpm. Maximum degradation of 78% has been achieved by the bacterial consortium in the batch study, while, in the reactor, it increases to 90%. Kinetics analysis suggests that the Teisser model best fits the experimental data, with a correlation coefficient (R 2) of 0.98. Ecotoxicological assessment using luminescent bacteria reveals 40% and 90% inhibition in luminescence in the case of untreated sample upon exposure for 30 min and 24 h, respectively, while the values obtained in the case of treated samples are 9% and 29%, respectively. Cytotoxicity assessment indicates 60% reduction in cell proliferation in untreated samples and <10% cell proliferation inhibition in treated samples, indicating a considerable decrease in toxicity post-bacterial treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Reactor Studymentioning

confidence: 99%

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Bioremediation of Imidacloprid in a Stirred Tank Reactor Using Bacterial Consortium: Kinetic Analysis and Toxicity Assessment

Tiwari

Tripathi

Mohan

et al. 2023

Ind. Eng. Chem. Res.

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“…Moreover, the inhibitory concentration of DMP, DBP, and DnOP, estimated using the Teisser model, were 1274, 1109, and 885 mg/L which correlated well with the experimental values. Kanaujiya and Pakshirajan [ 38 ] studied the inhibitory effect of DMP and DEP on their degradation and biomass growth by Cellulosimicrobium funkei and identified Teisser model as the best model to describe the inhibitory effect. The other models used in this study such as Andrews, Aiba, and Edward, also shown good fit with low SSE value (<13 × 10 −5 ) and high R 2 value (>0.97) for all the PAEs.…”

Section: Resultsmentioning

confidence: 99%

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

Self Cite

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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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“…The basic fundamental of mass balance are as follows: X in − X out = X Accum/rem where X in is input concentration, X out is the output concentration, and X Accum/rem is concentration after accumulation or removal. 75 An investigation of potential of Cellulosimicrobium funkei for degrading dimethyl phthalate (DMP) and diethyl phthalate (DEP) in a continuous stirred tank reactor (CSTR), and Xie et al , (2023) evaluated Bacillus sp. MY156 for degrading dibutyl phthalate (DBP) and DEP.…”

Section: Microorganisms Cold-adapted Mechanismmentioning

confidence: 99%

Application of cold-adapted microbial agents in soil contaminate remediation: biodegradation mechanisms, case studies, and safety assessments

Li,

Wen,

Fang

et al. 2024

RSC Adv.

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Mass balance and kinetics of biodegradation of endocrine disrupting phthalates by Cellulosimicrobium funkei in a continuous stirred tank reactor system

Cited by 12 publications

References 38 publications

Bioremediation of Imidacloprid in a Stirred Tank Reactor Using Bacterial Consortium: Kinetic Analysis and Toxicity Assessment

Bioremediation of Imidacloprid in a Stirred Tank Reactor Using Bacterial Consortium: Kinetic Analysis and Toxicity Assessment

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

Application of cold-adapted microbial agents in soil contaminate remediation: biodegradation mechanisms, case studies, and safety assessments

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