Biodegradation of catechol by free and immobilized cells of Achromobacter xylosoxidans strain 15DKVB isolated from paper and pulp industrial effluents

Bramhachari, Pallaval Veera; Reddy, D. Rajasekhar; Kotresha, D.

doi:10.1016/j.bcab.2016.05.003

Cited by 25 publications

(12 citation statements)

References 45 publications

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“…There are several bacteria that have been characterized to metabolize catechol including Pseudomonas sp., 3 Rhodococcus sp., 32 Stenotrophomonas sp., Acinetobacter sp., 14 and Achromobacter sp. 15 The genus Paracoccus is ubiquitous in nature, which has been previously isolated from wastewater, contaminated soil, and activated sludge. They are characterized to utilize a wide array of organic compounds and aromatic hydrocarbons as nutrient and energy sources.…”

Section: Results and Discussionmentioning

confidence: 99%

Bioengineered Graphene Oxide Microcomposites Containing Metabolically Versatile Paracoccus sp. MKU1 for Enhanced Catechol Degradation

et al. 2020

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Paracoccus sp . MKU1, a metabolically versatile bacterium that encompasses diverse metabolic pathways in its genome for the degradation of aromatic compounds, was investigated for catechol bioremediation here for the first time to our knowledge. Paracoccus sp. MKU1 degraded catechol at an optimal pH of 7.5 and a temperature of 37 °C, wherein 100 mg/L catechol was completely mineralized in 96 h but required 192 h for complete mineralization of 500 mg/L catechol. While investigating the molecular mechanisms of its degradation potential, it was unveiled that Paracoccus sp . MKU1 employed both the ortho and meta pathways by inducing the expression of catechol 1,2-dioxygenase (C12O) and catechol 2,3-dioxygenase (C23O), respectively. C23O expression at transcriptional levels was significantly more abundant than C12O , which indicated that catechol degradation was primarily mediated by extradiol cleavage by MKU1. Furthermore, poly(MAA- co -BMA)-GO (PGO) microcomposites containing Paracoccus sp . MKU1 were synthesized, which degraded catechol (100 mg/L) completely within 48 h with excellent recycling performance for three cycles. Thus, PGO@ Paracoccus microcomposites proved to be efficient in catechol degradation at not only faster rates but also with excellent recycling performances than free cells. These findings accomplish that Paracoccus sp . MKU1 could serve as a potential tool for bioremediation of catechol-polluted industrial wastewater and soil.

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Section: Results and Discussionmentioning

confidence: 99%

Bioengineered Graphene Oxide Microcomposites Containing Metabolically Versatile Paracoccus sp. MKU1 for Enhanced Catechol Degradation

et al. 2020

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“…In this study, in order to achieve its further and better application in phenol-polluted drinking water source, the strain DW-1 could be used as seed bacteria in the treatment of biological pretreatment process in view of existing biological treatment processes in drinking water treatment systems, which mainly includes biological pre-treatment and biofiltration processes. However, in biological treatment technology, especially microbial immobilization technology has greatly improved the processing efficiency ( Liu et al, 2009 ; Bramhachari et al, 2016 ), can resist changes in the external environment, and has a greater application potential ( Shin et al, 2019 ). To our knowledge, the stability of the microorganisms in biological treatment systems has a significant influence on the effectiveness of the treatment.…”

Section: Introductionmentioning

confidence: 99%

Genomic Analysis and Stability Evaluation of the Phenol-Degrading Bacterium Acinetobacter sp. DW-1 During Water Treatment

Chen

Zhang

et al. 2021

Front. Microbiol.

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Phenol is a toxic organic molecule that is widely detected in the natural environment, even in drinking water sources. Biological methods were considered to be a good tool for phenol removal, especially microbial immobilized technology. However, research on the “seed” bacteria along with microbial community analysis in oligotrophic environment such as drinking water system has not been addressed. In this study, Acinetobacter sp. DW-1 with high phenol degradation ability had been isolated from a drinking water biofilter was used as seeded bacteria to treat phenol micro-polluted drinking water source. Meanwhile, the whole genome of strain DW-1 was sequenced using nanopore technology. The genomic analysis suggests that Acinetobacter sp. DW-1 could utilize phenol via the β-ketoadipate pathway, including the catechol and protocatechuate branches. Subsequently, a bio-enhanced polyhedral hollow polypropylene sphere (BEPHPS) filter was constructed to investigate the stability of the seeded bacteria during the water treatment process. The denatured gradient gel electrophoresis (DGGE) profile and the quantification of phenol hydroxylase gene results indicate that when the BEPHPS filter was operated for 56 days, Acinetobacter sp. was still a persistent and competitive bacterium in the treatment group. In addition, 16S rRNA gene amplicon sequencing results indicate that Acinetobacter sp., as well as Pseudomonas sp., Nitrospira sp., Rubrivivax sp. were the predominant bacteria in the treatment group, which were different from that in the CK group. This study provides a better understanding of the mechanisms of phenol degradation by Acinetobacter sp. DW-1 at the gene level, and provides new insights into the stability of seeded bacteria and its effects on microbial ecology during drinking water treatment.

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“…Different chemical and biological treatment technologies have been employed for the reduction of phenol content in industrial wastes. The biological management has become helpful because of simplicity of the process, cost effectiveness, and its potentiality to bend toxic resources into secure products (Bramhachari et al, 2016;Youssef et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Fertilizing Potentiality of Fungal-Treated Olive Mill Solid Waste to Improve Some Growth and Physiological Parameters of Vicia faba L.

et al. 2020

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T HE MAIN objective of the present work is to biodegrade the phenols content of olive mill solid waste by a locally isolated fungus under optimized culture conditions and study the effect of the crude olive mill solid waste (OMSW), fermented olive mill solid waste (FOMSW), as well as the residue of water extracted olive mill solid waste (ROMSW) on some growth and physiological biomarkers of Vicia faba. Aspergillus tamarii was the most efficient fungus of ten isolated fungi, where it completely (100%) degraded the phenolic contents of OMSW under the optimized culture conditions. Data showed that applying FOMSW and ROMSW resulted in a significant alleviation of OMSW adverse effects on plant shoots and roots, chlorophylls content, chlorophyll stability index, quantum yield of PSII (Fv/Fm), carbohydrates and protein content as well as the macro-elements K, P, Mg and Ca content. This improvement was increased with increasing concentrations of ROMSW, while it increased up to 4% of FOMSW. Even as the crude OMSW negatively affects the growth and physiological attributes of the tested plant, all treatments stimulated them. It seems that detoxification of OMSW either by A. tamarii or water resulted in a marked reduction of phenolics and rising in pH that might improve the soil characteristics and allows a secure and efficient dumping of OMSW.

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Biodegradation of catechol by free and immobilized cells of Achromobacter xylosoxidans strain 15DKVB isolated from paper and pulp industrial effluents

Cited by 25 publications

References 45 publications

Bioengineered Graphene Oxide Microcomposites Containing Metabolically Versatile Paracoccus sp. MKU1 for Enhanced Catechol Degradation

Bioengineered Graphene Oxide Microcomposites Containing Metabolically Versatile Paracoccus sp. MKU1 for Enhanced Catechol Degradation

Genomic Analysis and Stability Evaluation of the Phenol-Degrading Bacterium Acinetobacter sp. DW-1 During Water Treatment

Fertilizing Potentiality of Fungal-Treated Olive Mill Solid Waste to Improve Some Growth and Physiological Parameters of Vicia faba L.

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