Enhanced biodegradation of phenolic wastewaters with acclimatized activated sludge – A kinetic study

Kamali, Mohammadreza; Gameiro, Tânia; Costa, Maria Elisabete V.; Aminabhavi, Tejraj M.

doi:10.1016/j.cej.2019.122186

Cited by 56 publications

(17 citation statements)

References 50 publications

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“…The KI value (255.0 mg L −1 ) obtained from this study also falls in the range of 54.1-799.0 mg L −1 for the aerobic environment. The KI value of our pure culture was close to that of the mixed culture used by Kamali et al [6]. Figure 7 shows the time profile of the growth curve for determining a specific growth rate at the logarithmic growth phase for each batch test, at various initial phenol contents ranging from 68.3 to 563.4 mg/L, and initial cell concentrations ranging from 0.012 to 0.059 OD 600 (4.13-20.28 mg cell/L).…”

Section: Batch Experiments For Free Cellssupporting

confidence: 88%

“…This finding was much higher than that (0.011 g phenol gVSS −1 d −1 ) obtained in the study of Rosenkranz et al [38]. However, the value of the maximum phenol degradation rate attained in this study was much lower compared to that (12.5 g phenol gVSS −1 d −1 ) reported by Kamali et al [6].…”

Section: Batch Experiments For Free Cellscontrasting

confidence: 77%

“…The relevant techniques employed to determine the biokinetic parameters from the experimental data of the batch experiments are discussed below. maximum phenol degradation rate attained in this study was much lower compared to that (12.5 g phenol gVSS −1 d −1 ) reported by Kamali et al [6]. The cell growth profiles under different initial phenol concentrations are shown in Figure 5b.…”

Section: Batch Experiments For Free Cellscontrasting

confidence: 69%

“…In the first three cycles, the complete removal of 4-chlorophenol at reaction times of 84, 8 and 6 h, respectively, was achieved in their study. Kamali et al [6] indicated that the initial phenol concentration of 250-1000 mg/L was nearly degraded within 150-390 min in an aerobic SBR with the well-acclimated, activated sludge mixed culture. Later on, Angelucci et al [40] conducted an anaerobic SBR with a stepwise increase in phenol concentration, from 100 to 2000 mg/L, in order to induce a specialized microbial consortium for phenol degradation.…”

Section: Batch Experiments For Free Cellsmentioning

confidence: 99%

“…Phenol, as a major component present in the effluents from several industries (oil refineries, coking plants, steel industries, etc. ), has been reported to be very harmful to the aquatic ecosystem [6,7]. The saline water in the Port of Gotherburg, located on the west coast of Sweden, was contaminated by a chemical spill of hundreds of tons of phenol in 1973 [8].…”

Section: Introductionmentioning

confidence: 99%

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Phenol Degradation Kinetics by Free and Immobilized Pseudomonas putida BCRC 14365 in Batch and Continuous-Flow Bioreactors

Lin

Cheng

2020

Processes

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Phenol degradation by Pseudomonas putida BCRC 14365 was investigated at 30 °C and a pH of 5.0–9.0 in the batch tests. Experimental results for both free and immobilized cells demonstrated that a maximum phenol degradation rate occurred at an initial pH of 7. The peak value of phenol degradation rates by the free and immobilized cells were 2.84 and 2.64 mg/L-h, respectively. Considering the culture at 20 °C, there was a lag period of approximately 44 h prior to the start of the phenol degradation for both free and immobilized cells. At the temperatures ranging from 25 to 40 °C, the immobilized cells had a higher rate of phenol degradation compared to the free cells. Moreover, the removal efficiencies of phenol degradation at the final stage were 59.3–92% and 87.5–92%, for the free and immobilized cells, respectively. The optimal temperature was 30 °C for free and immobilized cells. In the batch experiments with various initial phenol concentrations of 68.3–563.4 mg/L, the lag phase was practically negligible, and a logarithmic growth phase of a particular duration was observed from the beginning of the culture. The specific growth rate (μ) in the exponential growth phase was 0.085–0.192 h−1 at various initial phenol concentrations between 68.3 and 563.4 mg/L. Comparing experimental data with the Haldane kinetics, the biokinetic parameters, namely, maximum specific growth rate (μmax), the phenol half-saturation constant (Ks) and the phenol inhibition constant (KI), were determined to equal 0.31 h−1, 26.2 mg/L and 255.0 mg/L, respectively. The growth yield and decay coefficient of P. putida cells were 0.592 ± 4.995 × 10−3 mg cell/mg phenol and 5.70 × 10−2 ± 1.122 × 10−3 day−1, respectively. A completely mixed and continuous-flow bioreactor with immobilized cells was set up to conduct the verification of the kinetic model system. The removal efficiency for phenol in the continuous-flow bioreactor was approximately 97.7% at a steady-state condition. The experimental and simulated methodology used in this work can be applied, in the design of an immobilized cell process, by various industries for phenol-containing wastewater treatment.

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Section: Batch Experiments For Free Cellssupporting

confidence: 88%

Section: Batch Experiments For Free Cellscontrasting

confidence: 77%

Section: Batch Experiments For Free Cellscontrasting

confidence: 69%

Section: Batch Experiments For Free Cellsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phenol Degradation Kinetics by Free and Immobilized Pseudomonas putida BCRC 14365 in Batch and Continuous-Flow Bioreactors

Lin

Cheng

2020

Processes

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Upgrading sequencing batch reactor using attached biofilm

Abdelaziz¹,

Fouad

Mossad

2021

Water Environment Research

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A conventional sequencing batch reactor (SBR) was upgraded using fixed biofilm carriers with a specific surface area around 18 m 2 m −3 . The upgraded SBR was investigated to remove phenol from high strength wastewater operated under various operational conditions. The operational conditions used were variable volume exchange ratio (VER) up to 75%, hydraulic retention time (HRT) from (10.7-21.3 hr), aeration time (from 2 to 8 hr), and initial phenol concentration up to 600 mg L −1 . It was found that the upgraded SBR increased the removal efficiencies of biological oxygen demand (BOD 5 ), chemical oxygen demand (COD), and total suspended solids (TSS) by about 10% using high strength wastewater without phenol compared to SBR. Furthermore, the removal rate of phenol for the upgraded SBR was higher than conventional SBR by about 18% at 600 mg L − of initial phenol concentration under the same operational conditions. Compared to the conventional SBR, the upgraded version reduced the aeration step by 25% and achieved higher removal efficiency of phenol. Moreover, it reduced the excess sludge by about 23% and enhanced its properties by lowering the sludge volume index (SVI) by about 33%. © 2021 Water Environment Federation • Practitioner points• Upgrading conventional SBR by adding biofilm carriers is necessary for wastewater treatment with high strength wastewater. • The upgraded SBR has a higher resistance toward phenol compound due to the presence of the attached biofilm. • The upgraded SBR enhances sludge settling properties, decreases the amount of excess sludge, and also reduces the start-up period. • The number of cycles per day by upgraded SBR was more than the conventional SBR by 15%. • The upgraded SBR is an effective system and has good operational stability.

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Pharmaceutically Active Compounds in Water Bodies—Occurrence, Fate, and Toxicity

Kamali

Aminabhavi

Costa

et al. 2023

Green Energy and Technology

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Enhanced biodegradation of phenolic wastewaters with acclimatized activated sludge – A kinetic study

Cited by 56 publications

References 50 publications

Phenol Degradation Kinetics by Free and Immobilized Pseudomonas putida BCRC 14365 in Batch and Continuous-Flow Bioreactors

Phenol Degradation Kinetics by Free and Immobilized Pseudomonas putida BCRC 14365 in Batch and Continuous-Flow Bioreactors

Upgrading sequencing batch reactor using attached biofilm

Pharmaceutically Active Compounds in Water Bodies—Occurrence, Fate, and Toxicity

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