Optimization of Cultural and Physical Parameters for Phenol Biodegradation by Newly Identified Pseudomonas sp. AQ5-04

Abubakar, Aisami; Yasid, Nur Adela; Shukor, Mohd Yunus

doi:10.11594/jtls.10.03.06

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…Other researchers revealed a strong inhibition effect of nickel during phenol biodegradation by Pseudomonas sp. AQ5-04 or fungal strain Debaryomyces JS4 [31,32].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2

et al. 2021

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This study focuses on the phenol biodegradation kinetics by Stenotrophomonas maltophilia KB2 in a nickel-contaminated medium. Initial tests proved that a nickel concentration of 33.3 mg·L−1 caused a cessation of bacterial growth. The experiments were conducted in a batch bioreactor in several series: without nickel, at constant nickel concentration and at varying metal concentrations (1.67–13.33 g·m−3). For a constant Ni2+ concentration (1.67 or 3.33 g·m−3), a comparable bacterial growth rate was obtained regardless of the initial phenol concentration (50–300 g·m−3). The dependence µ = f (S0) at constant Ni2+ concentration was very well described by the Monod equations. The created varying nickel concentrations experimental database was used to estimate the parameters of selected mathematical models, and the analysis included different methods of determining metal inhibition constant KIM. Each model showed a very good fit with the experimental data (R2 values were higher than 0.9). The best agreement (R2 = 0.995) was achieved using a modified Andrews equation, which considers the metal influence and substrate inhibition. Therefore, kinetic equation parameters were estimated: µmax = 1.584 h−1, KS = 185.367 g·m−3, KIS = 106.137 g·m−3, KIM = 1.249 g·m−3 and n = 1.0706.

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“…Other researchers revealed a strong inhibition effect of nickel during phenol biodegradation by Pseudomonas sp. AQ5-04 or fungal strain Debaryomyces JS4 [31,32].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2

et al. 2021

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“…Similarly, Aisami et al. (2020) utilized the conc. of four heavy metals (As, Cd, Co, & Zn) as an important parameter.…”

Section: Discussionmentioning

confidence: 99%

Identification and acclimatization of the most potential 4‐chlorophenol degrading bacterial strain isolated from hazardous soil and observing its performance in various process parameters

Maity,

Kundu,

Adhikari (Nee Pramanik)

2023

Environmental Quality Mgmt

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Abstract4‐Chlorophenol is present as an essential compound of various organic compounds found in different kinds of hazardous waste. It can be easily eliminated from the industrial effluents by different physical and chemical treatment methods although best technique is bioremediation. To separate a potent bacterial strain from the soil that can dispose of 4‐chlorophenol from contaminated water, soil sample was collected from a hospital zone. Isolated bacterial colonies were segregated by the technique of soil enrichment with 500 mg/L 4‐chlorophenol and after that the enriched soil sample was serially diluted and transferred to petri plates with agar media. Twenty‐seven colonies were isolated and the most potent strain was selected in 50 mL liquid medium that was enriched previously with 500 mg/L of 4‐chlorophenol. C19 was found to be the most potent strain and it had the ability to reduce almost 99.97% of 4‐chlorophenol within 24 h, 37°C temperatures as well as in shaking condition (140–150 rpm) and pH 6.8–7.2. After the isolation, the strain was acclimatized in mineral salt medium (MSM) from lower concentration to higher concentration of 4‐chlorophenol to increase its removal capacity as well as to prepare the inoculums. Then parameter optimization study was performed where optimum temperature and pH was found to be 25°C and 6.5°C, respectively, 400 mL media volume and 8% inoculums were found to be most effective and finally 24 h time period was optimized. All these five optimum parameters were applied together to remove higher conc. of 4‐chlorophenol where almost 99.3% removals were obtained when the conc. was 600 mg/L. Moreover, more than 90% removals were obtained in case of 700, 800, and 900 mg/L concentration. Morphological, biochemical, nucleotide homology, and phylogenetic investigation of the strain was made which revealed that it was a rod shaped (Bacillus type), gram +ve, spore forming and motile bacterial strain and therefore, the selected strain was found to exhibit most extreme similarities (91.73%) with Bacillus cereus strain MK789657.

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“…for a variety of reasons. Even at modest doses, phenols and phenolic compounds are toxic to human health, and many of them are considered dangerous pollutants as a result, Aminophenols, butylhydroxytoluene, nonylphenols, and bisphenols are only a few examples of the phenolic substances Aisami et al (2020).…”

Section: Organic Pollution Of Phenolmentioning

confidence: 99%

Review on Advances in Biodegradation of Phenols: Kinetics, Modelling and Mass Transfer

Ladi

Sridevi

Rachana

et al. 2023

Int. J. Res. Granthaalayah

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Harmful pollutants like phenol and its derivatives are found in wastewater from a wide range of industries, including oil refining, medicines, coal conversion, chemistry, and petrochemistry. The high concentration, high toxicity, and difficult-to-degrade characteristics of phenols in wastewater pose a serious threat to the environment and to human health. By employing different strains of microorganisms and biocatalysts to create biodegradation procedures of diverse pollutants and a wide spectrum of hazardous compounds, biotechnology has successfully addressed significant environmental challenges. Among various phenols removal techniques, biodegradation is both economical and environmentally friendly. During the study of microbial degradation processes, there is a great deal of interest in the potential for mathematical modelling to forecast microbial growth and degrade harmful or inhibiting environmental pollutants at variable quantities. Such mathematical models are frequently created using aromatic compounds like phenol. The review discusses the following topics: kinetics, modelling, and mass transfer; future scope and directions; diverse microorganisms, bioreactors, the metabolic pathway of phenol, influencing factors, and recent advancements in biological therapy.

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Optimization of Cultural and Physical Parameters for Phenol Biodegradation by Newly Identified Pseudomonas sp. AQ5-04

Cited by 4 publications

References 35 publications

Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2

Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2

Identification and acclimatization of the most potential 4‐chlorophenol degrading bacterial strain isolated from hazardous soil and observing its performance in various process parameters

Review on Advances in Biodegradation of Phenols: Kinetics, Modelling and Mass Transfer

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