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Azo dye biodegradation in multiple-stage reactor systems

ABSTRACT: Microbial communities involved in the biodegradation of an azo dye in a two-stage AD system

PROVIDER: PRJEB52299 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR9976480_1.fastq.gz	Fastqsanger.gz
	ERR9976480_2.fastq.gz	Fastqsanger.gz
	ERR9976490_1.fastq.gz	Fastqsanger.gz
	ERR9976490_2.fastq.gz	Fastqsanger.gz
	ERR9976500_1.fastq.gz	Fastqsanger.gz

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Biodegradation of azo dye by anoxic microbial culture

Project description:Biodegradation of azo dye by L. lactis

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Molecular mechanism of zero valent iron-enhanced microbial azo reduction in Shewanella decolorationis S12

Project description:Here, we established a successive Fe0-enhanced microbe system to remove azo dye (a typical organic pollutant) by Shewanella decolorationis S12 (S. decolorationis S12, an effective azo dye degradation bacterium) and examined the gene expression time course (10, 30, 60, and 120 min) in whole genome transcriptional level. Comparing with the treatment without ZVI, approximately 8% genes affiliated with 10 different gene expression profiles in S. decolorationis S12 were significantly changed in 120 min during the ZVI-enhanced microbial azo reduction. Intriguingly, MarR transcriptional factor might play a vital role in regulating ZVI-enhanced azo reduction in the aspect of energy production, iron homeostasis, and detoxification. Further investigation showed that induced [Ni-Fe] H2ase genes (hyaABCDEF) and azoreductase genes (mtrABC-omcA) contributed to ZVI-enhanced energy production, while reduced iron uptake (hmuVCB and feoAB), induced sulfate assimilation (cysPTWA) and cysteine biosynthesis (cysM) related genes were essential to iron homeostasis and detoxification. This study disentangles underlying mechanisms of ZVI-enhanced azo reduction in S. decolorationis S12 and lays a foundation for further optimization of integrated ZVI-microbial system for efficient organic pollution treatment.

2021-10-01 | GSE160493 | GEO

Microbial ecology analysis of micro-aerated UASB reactor used to promote the complete removal of the azo dye Direct Black 22

Project description:Microbial ecology analysis of micro-aerated UASB reactor used to promote the complete removal of the azo dye Direct Black 22

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A proteomics analysis of fnr regulation of anaerobic metabolism of food dye and drug metabolism by Escherichia coli

Project description:Proteomic data from E. coli grown with or without the azo dye, Red Dye number 40. WT and delta fnr E. coli were cultured in Luria Broth media and cultures were inoculated with 250 uM Red No. 40 at either mid-exponential or stationary growth phases. Vehicle control samples were also analyzed at mid-exponential and stationary growth phases.

2023-07-06 | MSV000092365 | MassIVE

Hollow Palladium Nanoparticles Facilitated Biodegradation of an Azo Dye by Electrically Active Biofilms.

Project description:Dye wastewater severely threatens the environment due to its hazardous and toxic effects. Although many methods are available to degrade dyes, most of them are far from satisfactory. The proposed research provides a green and sustainable approach to degrade an azo dye, methyl orange, by electrically active biofilms (EABs) in the presence of solid and hollow palladium (Pd) nanoparticles. The EABs acted as the electron generator while nanoparticles functioned as the electron carrier agents to enhance degradation rate of the dye by breaking the kinetic barrier. The hollow Pd nanoparticles showed better performance than the solid Pd nanoparticles on the dye degradation, possibly due to high specific surface area and cage effect. The hollow cavities provided by the nanoparticles acted as the reaction centers for the dye degradation.

| S-EPMC5509264 | biostudies-literature

Microbial dynamics during azo dye degradation in a UASB reactor supplied with yeast extract.

Project description:The present work aimed to investigate the microbial dynamics during the anaerobic treatment of the azo dye blue HRFL in bench scale upflow anaerobic sludge bed (UASB) reactor operated at ambient temperature. Sludge samples were collected under distinct operational phases, when the reactor were stable (low variation of color removal), to assess the effect of glucose and yeast extract as source of carbon and redox mediators, respectively. Reactors performance was evaluated based on COD (chemical oxygen demand) and color removal. The microbial dynamics were investigated by PCR-DGGE (Polimerase Chain Reaction - Denaturing Gradient of Gel Electrophoresis) technique by comparing the 16S rDNA profiles among samples. The results suggest that the composition of microorganisms changed from the beginning to the end of the reactor operation, probably in response to the presence of azo dye and/or its degradation byproducts. Despite the highest efficiency of color removal was observed in the presence of 500 mg/L of yeast extract (up to 93%), there were no differences regarding the microbial profiles that could indicate a microbial selection by the yeast extract addition. On the other hand Methosarcina barkeri was detected only in the end of operation when the best efficiencies on color removal occurred. Nevertheless the biomass selection observed in the last stages of UASB operation is probably a result of the washout of the sludge in response of accumulation of aromatic amines which led to tolerant and very active biomass that contributed to high efficiencies on color removal.

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Anaerobic biodegradation

Project description:Biodegradation

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Biodecolorization and Biodegradation of Azo Dye Reactive Orange-16 by Marine <i>Nocardiopsis</i> sp.

Project description:BackgroundAzo dyes are xenobiotic compounds that have bioaccumulated in the environment due to escalated industrial development. These are hazardous in nature, possessing carcinogenic and mutagenic effects on human beings.ObjectivesThe perspective of the present study was to isolate and to determine azo dye (Reactive Orange-16) degrading potential of marine actinobacteria isolated from sediment samples of Port Blair, India.Material and methodsActinobacteria with dye decolorization potential were isolated from sea sediment samples. The actinobacterial isolate with the highest dye decolorizing percentage was identified with the help of phenotypic, biochemical and molecular studies. The different physico-chemical parameters for dye decolorization were also optimized. The nature of decolorization by the potent isolate was determined with the help of High Performance Liquid chromatography (HPLC) and Fourier Transformed Infrared spectroscopy (FTIR) techniques. Further the toxicity of RO-16 decolorized products was investigated with the help of phytotoxcity assay.ResultsOut of six actinobacterial isolates, VITVAMB 1 possessed the most efficient RO-16 decolorization property. It decolorized 85.6% of RO-16 (250 mg L-1) within 24hrs. Isolate VITVAMB 1 was identified to be Nocardiopsis sp. Maximum dye decolorization occurred at pH 8, temperature 35°C, 3% salt concentration and a dye concentration of 50 mg L-1.ConclusionsThe nature of decolorization by Nocardiopsis sp. was biodegradation. Additionally, the degraded dye metabolites were found to be less toxic than pure dye. The high decolorization potential of VITVAMB 1 and the low toxicity of its degradation products make it a prospective dye removal system. The marine origin of VITVAMB 1 also makes it an attractive source for novel azo dye reducing enzymes.

| S-EPMC7080967 | biostudies-literature

Project description:Azo dye degrading consortium HL

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Project description:Azo dye degrading consortium ZZ

| PRJNA976902 | ENA