Biodegradation Kinetic Studies on Phenol in Internal Draft Tube (Inverse Fluidized Bed) Biofilm Reactor Using<i>Pseudomonas fluorescens</i>: Performance Evaluation of Biofilm and Biomass Characteristics

Begum, S. Sabarunisha; Radha, K. V.

doi:10.1080/10889868.2013.827622

Cited by 18 publications

(4 citation statements)

References 51 publications

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“…as for toxic substrates, rates at higher concentrations of substrates are often inhibitory and under this conditions, other substrate inhibition model such as Haldane, Teissier-Edwards, Yano, Aiba and Luong are more often observed [15,16,29,42]. The Monod model is observed for toxic substrate under mostly specific conditions, where the microorganisms are being immobilized in the forms of artificial substrate like gellan gum or polyacrylamide or biofilm [43][44][45][46][47][48][49][50][51].…”

Section: Resultsmentioning

confidence: 99%

Modelling the Inhibition Kinetics of Molybdenum Reduction by the Molybdate-reducing Enterobacter cloacae

Yakasai

Saidu

2020

Bull Environ Sci Sust Manage

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The mathematical simulation of physical, chemical or biological data can assist a researcher in explaining the physicochemical or biological phenomenon by predicting or estimating the possible actions, to replicate a prediction or retroactivity and to schedule better experiments. Bacteria are an emerging instrument for the bioremediation of the molybdenum pollutant in the world, molybdenum reduction into insoluble molybdenum blue. In this study, the molybdenum reduction rate by the bacterium Enterobacter cloacae was studied for its inhibitory kinetics characteristics using sodium molybdate as a substrate. Modeling kinetics showed that molybdenum reduction could be explained by several models such as Monod, Haldane, Hans-Levenspiel, Luong, Teissier, Aiba and Yano with Aiba as the best model as judged using error function analysis such as bias and accuracy factors (BF and AF), root mean square error (RMSE), adjusted coefficient of determination (adjR2), and corrected Akaike Information Criterion (AICc). The calculated value for the Teissier-Edwardâ€™s constants, which are qmax, Ks, and Ki that are maximal reduction rate, half saturation constant for maximal reduction, half saturation constant for inhibition of reduction were 7.77 (95% C.I., 4.41 to 19.95) ïmole Mo-blue hr-1, 26.63 (95% C.I., 12.82 to 40.44) mM and 51.39 (95% C.I., 23.67 to 79.10) mM, respectively. The true maximal reduction rate, which occurred when the slope of the curve is zero occurs at 36 mM molybdate concentration and a corresponding value of 1.85 ïmole Mo-blue hr-1. The fitting parameters of the Monod model prove a strong bacterial resistance to higher toxic molybdenum levels, making the bacterium useful tool for metals bioremediation work.

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Section: Resultsmentioning

confidence: 99%

Modelling the Inhibition Kinetics of Molybdenum Reduction by the Molybdate-reducing Enterobacter cloacae

Yakasai

Saidu

2020

Bull Environ Sci Sust Manage

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“…The preliminary stage of upstream processing work started with reviving the host by subsequent streaking of a mother culture of P.fluorescens on a Pseudomonas agar slant and keeping it for incubation at 28°C for 2 days. Primary culture was prepared by transferring two loops of microorganisms having concentration of 4.1 × 10 4 colonies/mL from the agar slant into 100 mL of feed medium containing 20 mL of mineral salt medium and 80 mL of phenol from the initial substrate (phenol) concentration of 1200 mg/L in four 250 mL conical flasks . They were kept in a shaker incubator at a temperature of 28°C and agitated at a speed of 120 rpm.…”

Section: Methodsmentioning

confidence: 99%

Gas–liquid mass transfer studies in inverse fluidized bed biofilm reactor for the biodegradation of industrial effluent rich in phenolic compounds

Begum¹,

Radha

2015

Env Prog and Sustain Energy

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Gas-liquid mass transfer studies were carried out in inverse fluidized bed biofilm reactor (IFBBR) for the biodegradation of phenol. Studies were done to analyze the effect of superficial air velocity (U g ), gas holdup (E g ), and biofilm characteristics such as biofilm thickness, biofilm dry density, suspended and attached biomass concentration, and bioparticle density on oxygen transfer rate (OTR) and gas-liquid volumetric mass transfer coefficient (k L a) for different superficial air velocities and various particle sizes (2.9, 3.5, and 3.8 mm). Average OTR and k L a was found to be high [(OTR) avg. 5 0.0159 min 21 ; (k L a) avg. 5 1.8823 g/(L min)] for the particle size of 3.5 mm at the optimum superficial air velocity (U gm ) of 0.220 m/s which created high turbulence with smaller bubble size. Higher volumetric mass transfer coefficient and OTR resulted in higher percentage of Chemical Oxygen Demand (COD) removal (98%) and phenol degradation (100%) in IFBBR. The gas holdup dominated over the smaller size bubbles resulting in higher mass (oxygen) transfer rate. Thin, dense, and stable biofilm was produced at U gm . Above U gm , thickness of the biofilm was increased where the detachment force did not control the outgrowth of biofilm anymore and thus the k L a was found to be decreasing. V C 2015 American Institute of Chemical Engineers Environ Prog, 35: 433-438, 2016

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“…Primary culture was prepared by transferring microorganisms into feed medium containing mineral salt medium [20] and pharmaceutical biomedical wastewater which were then kept in incubator to attain steady state growth. Secondary culture was then developed from primary and was used as inoculum for the formation of biofilm onto polystyrene support particles in IFFBR [21].…”

Section: Microorganismmentioning

confidence: 99%

Investigation of flow dynamic characteristics of inverse fluidized bed biofilm reactor for degrading pharmaceutical based biomedical wastewater

Begum¹,

Sikkandar

Prakash³

et al. 2020

Environmental Engineering Research

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The paper investigates the flow dynamic behaviour of inverse fluidized bed biofilm reactor (IFBBR) for the treatment of pharmaceutical based biomedical wastewater. The residence time distribution (RTD) study has been employed as a tool to investigate the flow dynamic behaviour of wastewater within the reactor. The biofilm reactor is operated using Pseudomonas fluorescens for various ratios of settled bed volume to reactor working volume (V b /V r) with different superficial air velocities and examined their impact on flow dynamics. The outcomes of this study demonstrate the presence of dead volume and short circuiting in the reactor were reduced for the optimized (V b /V r) ratio of 0.20 and optimum superficial air velocity (U g) m of 0.220 m/s. The potential of IFBBR was experimentally validated by analysing the chemical oxygen demand (COD) removal efficiency, total dissolved solids (TDS) and total suspended solids (TSS) emanating from the wastewater. Findings of this study reveals that maximum COD reduction of about 92% was achieved when the reactor was operated with (V b /V r) m of 0.20 with superficial air velocity, U gm of 0.220 m/s showing the optimal operating parameters for IFBBR which has good mixing and less back mixing condition inside the reactor.

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Biodegradation Kinetic Studies on Phenol in Internal Draft Tube (Inverse Fluidized Bed) Biofilm Reactor UsingPseudomonas fluorescens: Performance Evaluation of Biofilm and Biomass Characteristics

Cited by 18 publications

References 51 publications

Modelling the Inhibition Kinetics of Molybdenum Reduction by the Molybdate-reducing Enterobacter cloacae

Modelling the Inhibition Kinetics of Molybdenum Reduction by the Molybdate-reducing Enterobacter cloacae

Gas–liquid mass transfer studies in inverse fluidized bed biofilm reactor for the biodegradation of industrial effluent rich in phenolic compounds

Investigation of flow dynamic characteristics of inverse fluidized bed biofilm reactor for degrading pharmaceutical based biomedical wastewater

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