scholarly journals Coupling azo dye degradation and biodiesel production by manganese-dependent peroxidase producing oleaginous yeasts isolated from wood-feeding termite gut symbionts

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Sameh Samir Ali ◽  
Rania Al-Tohamy ◽  
Eleni Koutra ◽  
Michael Kornaros ◽  
Maha Khalil ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Azo Dyes ◽  
Textile Industry ◽  
Dye Degradation ◽  
Debaryomyces Hansenii ◽  
Environmentally Friendly ◽  
Textile Wastewater ◽  
Treatment Method ◽  
Biodiesel Production ◽  
Natural Ecosystems

Abstract Background Textile industry represents one prevalent activity worldwide, generating large amounts of highly contaminated and rich in azo dyes wastewater, with severe effects on natural ecosystems and public health. However, an effective and environmentally friendly treatment method has not yet been implemented, while concurrently, the increasing demand of modern societies for adequate and sustainable energy supply still remains a global challenge. Under this scope, the purpose of the present study was to isolate promising species of yeasts inhabiting wood-feeding termite guts, for combined azo dyes and textile wastewater bioremediation, along with biodiesel production. Results Thirty-eight yeast strains were isolated, molecularly identified and subsequently tested for desired enzymatic activity, lipid accumulation, and tolerance to lignin-derived metabolites. The most promising species were then used for construction of a novel yeast consortium, which was further evaluated for azo dyes degradation, under various culture conditions, dye levels, as well as upon the addition of heavy metals, different carbon and nitrogen sources, and lastly agro-waste as an inexpensive and environmentally friendly substrate alternative. The novel yeast consortium, NYC-1, which was constructed included the manganese-dependent peroxidase producing oleaginous strains Meyerozyma caribbica, Meyerozyma guilliermondii, Debaryomyces hansenii, and Vanrija humicola, and showed efficient azo dyes decolorization, which was further enhanced depending on the incubation conditions. Furthermore, enzymatic activity, fatty acid profile and biodiesel properties were thoroughly investigated. Lastly, a dye degradation pathway coupled to biodiesel production was proposed, including the formation of phenol-based products, instead of toxic aromatic amines. Conclusion In total, this study might be the first to explore the application of MnP and lipid-accumulating yeasts for coupling dye degradation and biodiesel production.

scholarly journals Bioefficacies of microbes for mitigation of Azo dyes in textile industry effluent: A review

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9858-9881
Author(s):  
Ambika Saxena ◽  
Sarika Gupta
Keyword(s):  
Azo Dyes ◽  
Textile Industry ◽  
Dye Degradation ◽  
Complex Structure ◽  
Industrial Effluent ◽  
Chemical Properties ◽  
Textile Wastewater ◽  
Textile Dyeing ◽  
Industry Effluent ◽  
The Impact

In recent years, India has emerged as a promising industrial hub. It has a cluster of textile, dyeing, and printing industries. The adjoining rivers/water bodies receive mostly untreated discharge from these industries. Textile industrial effluent contains various contaminants (dyes, heavy metals, toxicants, and other organic/inorganic dissolved solids) that alter the physico-chemical properties of adjoining land and waterbodies in which it is discharged, thereby degrading the water quality and subsequently affecting the landscapes in the vicinity. This ultimately affects the flora and fauna of the locale and has adverse effects on human health. Out of the total dyes (approximately 10,000 dyes) exploited in the textile dyeing and printing units, azo dyes possess a complex structure and are synthetic in origin. They contribute nearly 70% to the total effluent discharge. Biological processes are based on the ability of inhabiting indigenous microorganisms in these contaminated environments to tolerate, resist, decolorize/degrade, and mitigate the recalcitrant compounds. Exploring microbes with higher efficacy of azo dye degradation can reduce the amount of chemical discharged from the process. The present review explores the potential of microbial diversity for the development of an effective bioremediation approach. The review also includes the impact of azo dyes on the flora and fauna, as well as conventional and microbe-assisted nanoparticle technology for treatment of the textile wastewater targeting the degradation of dye contaminants.

scholarly journals Waste treatment of remazol blue compounds based on ozonation/AOP in a bubble column reactor

2018 ◽  
Vol 67 ◽  
pp. 04017
Author(s):  
Meidina Sekar Nadisti ◽  
Nur Annisa ◽  
Eva Fathul Karamah ◽  
Nelson Saksono ◽  
Setijo Bismo
Keyword(s):  
Flow Rate ◽  
Textile Industry ◽  
Waste Treatment ◽  
Advanced Oxidation Process ◽  
Bubble Column ◽  
Dye Degradation ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Bubble Column Reactor ◽  
Textile Dye

Increased production in the textile industry has the potential to result in high dye waste water. Various conventional methods to handle with textile waste treatment have been done, but still considered not yet or less effective. The AOP technology (Advanced Oxidation Processes) applied in this research is a rapid degradation technology in textile wastes with advanced oxidation process through the formation of hydroxyl radical (OH) which is considered to optimize the degradation process of textile dye waste. This study aims to evaluate the performance of ozonation methods and AOP (O3/UV/H2O2) in dye degradation of textile wastewater containing remazol blue compounds. Both configuration methods used are optimized in several parameters such as waste flow rate, ozone voltage and pH to obtain maximum remazol blue degradation. From this study, the higher percentage to remazol blue degradation is 99.99%, which is achieved by AOP method, with double air injection air flow rate of 10 L/min and 0.25 L/min liquid flow rate.

Axo-dye biodegradation under anoxic conditions

1996 ◽  
Vol 34 (5-6) ◽  
pp. 495-500 ◽  
Author(s):  
U. Zissi ◽  
G. Lyberatos
Keyword(s):  
Bacillus Subtilis ◽  
Azo Dyes ◽  
Textile Industry ◽  
Azo Dye ◽  
Manufacturing Industry ◽  
Dye Degradation ◽  
Synthetic Medium ◽  
Terminal Electron Acceptor ◽  
Anoxic Conditions ◽  
Nitrogen Double Bond

Biological oxidation of azo-dyes is important for wastewater treatment. Azo-dyes are synthetic organic colorants that exhibit great structural variety. A large majority of these dyes are released into the environment. The textile industry and dyestuff manufacturing industry are two major sources of released azodyes. In the present study, we focus on the anoxic degradation of a disperse azo-dye, p-aminoazobenzene (pAAB), a simple azo-dye, by a pure culture of Bacillus subtilis, growing on a synthetic medium. Bacillus subtilis is a bacterium capable of using nitrate and/or nitrite as terminal electron acceptor under anoxic conditions. This bacterium lacks the capability for fermentation. The degradation of p-aminoazobenzene by Bacillus subtilis was examined through batch experiments in order to elucidate the mechanism of dye degradation. The results proved that Bacillus subtilis co-metabolizes p-aminoazobenzene under denitrifying conditions, in the presence of glucose as carbon source, producing aniline and p-phenylenediamine as the nitrogen-nitrogen double bond is broken.

scholarly journals Bio-removal of Azo Dyes: A Review

2017 ◽  
Vol 5 (2) ◽  
pp. 108-126 ◽  
Author(s):  
Pradeep Kumar Singh ◽  
Ram Lakhan Singh
Keyword(s):  
Azo Dyes ◽  
Textile Industry ◽  
Textile Wastewater ◽  
Oxidative Enzymes ◽  
Synthetic Dyes ◽  
Biological Processes ◽  
Chemical Methods ◽  
Physico Chemical ◽  
Pharmaceutical Industries ◽  
Low Efficiency

Synthetic dyes are widely used in textile, paper, food, cosmetics and pharmaceutical industries with the textile industry as the largest consumer. Among all the available synthetic dyes, azo dyes are the largest group of dyes used in textile industry. Textile dyeing and finishing processes generate a large amount of dye containing wastewater which is one of the main sources of water pollution problems worldwide. Several physico-chemical methods have been applied to the treatment of textile wastewater but these methods have many limitations due to high cost, low efficiency and secondary pollution problems. As an alternative to physico-chemical methods, biological methods comprise bacteria, fungi, yeast, algae and plants and their enzymes which received increasing interest due to their cost effectiveness and eco-friendly nature. Decolorization of azo dyes by biological processes may take place either by biosorption or biodegradation. A variety of reductive and oxidative enzymes may also be involved in the degradation of dyes. This review provides an overview of decolorization and degradation of azo dyes by biological processes and establishes the fact that these microbial and plant cells are significantly effective biological weapon against the toxic azo dyes. Int. J. Appl. Sci. Biotechnol. Vol 5(2): 108-126

scholarly journals Enhanced Degradation of Dyes present in Textile Effluent by Ultrasound Assisted Electrochemical Reactor

2019 ◽  
Vol 5 (10) ◽  
pp. 2131-2142 ◽  
Author(s):  
Asad Ali ◽  
Naeem Ejaz ◽  
Sadia Nasreen ◽  
Ali Nasir ◽  
Liaqat Ali Qureshi ◽  
...  
Keyword(s):  
Textile Industry ◽  
Dye Degradation ◽  
Textile Wastewater ◽  
Electrochemical Reactor ◽  
Quantitative Composition ◽  
Sem Images ◽  
Dc Power ◽  
Degradation Of Dyes ◽  
Before And After ◽  
Ultrasound Assisted

Textile industry being the backbone of any country plays a very essential part in the development of the country. The treatment of chemical dyes present in textile wastewater and its reuse for irrigational purposes has become a major concern for the researchers. The present study emphasis on proper degradation of commonly used reactive blue (RB) 19 dye present in textile effluents using ultrasound assisted electrochemical reactor technique and presenting the analysis of microparticles present in dyes and its quantitative composition before and after treatment by means of scanning electron microscopy (SEM) images at high magnification. The investigation was carried out using various parameters such as Concentration, pH and reaction rate. The testing setup also includes UV absorbance spectrophotometer, ultrasonic bath, DC power supply, weighing balance, suction apparatus, and thermometer. Our studies show that the Optimum dye degradation (i.e. 82.3 %) was achieved at time 120 minutes with pH of 3.22 for 50 ppm of solution and the maximum degradation (i.e. 85%) was achieved at 40 0C using acid (HCl) and Base (NaOH) in equal amounts after 120 minutes for solution of 30ppm. The work efficiency includes saving time, money and degrading the dyes from wastewater before toxic sludge formation.

BIOCATALYST FOR ENVIRONMENTALLY FRIENDLY PROCESSES OF ORGANIC SYNTHESIS AND BIODIESEL PRODUCTION

Tsitologiya ◽  
2018 ◽  
Vol 60 (7) ◽  
pp. 567-571
Author(s):  
A. I. Sidorenko ◽  
◽  
A. V. Sklyarenko ◽  
S. V. Yarotsky ◽  
◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Environmentally Friendly ◽  
Biodiesel Production

Textile Wastewater Reuse: Ozonation of Membrane Concentrated Secondary Effluent

1999 ◽  
Vol 40 (4-5) ◽  
pp. 99-105 ◽  
Author(s):  
A. Lopez ◽  
G. Ricco ◽  
R. Ciannarella ◽  
A. Rozzi ◽  
A. C. Di Pinto ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Acute Toxicity ◽  
Wastewater Treatment Plant ◽  
Textile Industry ◽  
Nonionic Surfactants ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Textile Wastewater ◽  
Secondary Effluent ◽  
Complete Disappearance

Among the activities appointed by the EC research-project “Integrated water recycling and emission abatement in the textile industry” (Contract: ENV4-CT95-0064), the effectiveness of ozone for improving the biotreatability of recalcitrant effluents as well as for removing from them toxic and/or inhibitory pollutants has been evaluated at lab-scale. Real membrane concentrates (pH=7.9; TOC=190 ppm; CDO=595 ppm; BOD5=0 ppm; Conductivity=5,000 μS/cm; Microtox-EC20=34%) produced at Bulgarograsso (Italy) Wastewater Treatment Plant by nanofiltering biologically treated secondary textile effluents, have been treated with ozonated air (O3conc.=12 ppm) over 120 min. The results have indicated that during ozonation, BOD5 increases from 0 to 75 ppm, whereas COD and TOC both decrease by about 50% and 30 % respectively. As for potentially toxic and/or inhibitory pollutants such as dyes, nonionic surfactants and halogenated organics, all measured as sum parameters, removals higher than 90% were achieved as confirmed by the complete disappearance of acute toxicity in the treated streams. The only ozonation byproducts searched for and found were aldehydes whose total amount continuously increased in the first hour from 1.2 up to 11.8 ppm. Among them, formaldehyde, acetaldehyde, glyoxal, propionaldehyde, and butyraldehyde were identified by HPLC.

Dye degradation potential of Acinetobacter baumannii strain VITVB against commercial azo dyes

2021 ◽  
pp. 1-27
Author(s):  
Veena Sreedharan ◽  
Purbasha Saha ◽  
Kokati Venkata Bhaskara Rao
Keyword(s):  
Acinetobacter Baumannii ◽  
Azo Dyes ◽  
Dye Degradation

Biodegradation of selected azo dyes under methanogenic conditions

1997 ◽  
Vol 36 (6-7) ◽  
pp. 65-72 ◽  
Author(s):  
Elías Razo-Flores ◽  
Maurice Luijten ◽  
Brian Donlon ◽  
Gatze Lettinga ◽  
Jim Field
Keyword(s):  
Azo Dyes ◽  
Textile Industry ◽  
Azo Dye ◽  
Biological Treatment ◽  
Present Report ◽  
Anaerobic Bacteria ◽  
Aminosalicylic Acid ◽  
Batch Experiments ◽  
Azo Reduction ◽  
Uasb Reactors

Biological treatment of wastewaters discharged by the textile industry could potentially be problematic due to the high toxicity and recalcitrance of the commonly-used azo dye compounds. In the present report, the fate of two azo dyes under methanogenic conditions was studied. Mordant Orange 1 (MO1) and Azodisalicylate (ADS) were completely reduced and decolorised in continuous UASB reactors in the presence of cosubstrates. In the MO1 reactor, both 5-aminosalicylic acid (5-ASA) and 1,4-phenylenediamine were identified as products of azo cleavage. After long adaptation periods, 5-ASA was detected at trace levels, indicating further mineralization. ADS, a pharmaceutical azo dye constructed from two 5-ASA units, was completely mineralized even in the absence of cosubstrate, indicating that the metabolism of 5-ASA could provide the reducing equivalents needed for the azo reduction. Batch experiments confirmed the ADS mineralization. These results demonstrate that some azo dyes could serve as a carbon, energy, and nitrogen source for anaerobic bacteria.

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