Fungal mediated decolorization of media containing procion dyes

2001 ◽  
Vol 43 (2) ◽  
pp. 285-290 ◽  
Author(s):  
S. Sumathi ◽  
B. S. Manju
Keyword(s):  
Fungal Biomass ◽  
Large Scale ◽  
Reactive Dyes ◽  
Exponential Growth Phase ◽  
Dye Uptake ◽  
Significant Extent ◽  
Textile Mill ◽  
Colour Removal ◽  
Aspergillus Foetidus ◽  
Uptake Process

An isolated fungus, Aspergillus foetidus was found to effectively decolorize media containing azo reactive dyes, namely Procion dyes, under aerobic conditions. The extent of colour removal was 90% within 48 h of growth of the fungus. The entire colour was found to be strongly bioadsorbed to the rapidly settling spherical fungal biomass pellets. Our investigations reveal that the process of decolorization is concomitant with the exponential growth phase of the fungus and has an obligate requirement for a biodegradable substrate such as glucose. Kinetic analyses of fungal decolorization indicate that the rates of colour uptake decrease to a significant extent with increasing initial concentrations of dye. The fungus was able to grow and decolorize media in the presence of 5 ppm of chromium and 1% sodium chloride. An alternate and cheaper carbon source such as starch supported the growth and decolorization process. These results suggest that the dye uptake process mediated by Aspergillus foetidus has a potential for large-scale treatment of textile mill discharges.

scholarly journals Extraction of short chain chitooligosaccharides from fungal biomass and their use as promoters of arbuscular mycorrhizal symbiosis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrea Crosino ◽  
Elisa Moscato ◽  
Marco Blangetti ◽  
Gennaro Carotenuto ◽  
Federica Spina ◽  
...  
Keyword(s):  
Fungal Biomass ◽  
Large Scale ◽  
Low Cost ◽  
Trichoderma Viride ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
Production Costs ◽  
Short Chain ◽  
Mycorrhizal Symbiosis ◽  
Major Interest

AbstractShort chain chitooligosaccharides (COs) are chitin derivative molecules involved in plant-fungus signaling during arbuscular mycorrhizal (AM) interactions. In host plants, COs activate a symbiotic signalling pathway that regulates AM-related gene expression. Furthermore, exogenous CO application was shown to promote AM establishment, with a major interest for agricultural applications of AM fungi as biofertilizers. Currently, the main source of commercial COs is from the shrimp processing industry, but purification costs and environmental concerns limit the convenience of this approach. In an attempt to find a low cost and low impact alternative, this work aimed to isolate, characterize and test the bioactivity of COs from selected strains of phylogenetically distant filamentous fungi: Pleurotus ostreatus, Cunninghamella bertholletiae and Trichoderma viride. Our optimized protocol successfully isolated short chain COs from lyophilized fungal biomass. Fungal COs were more acetylated and displayed a higher biological activity compared to shrimp-derived COs, a feature that—alongside low production costs—opens promising perspectives for the large scale use of COs in agriculture.

Study on Decolouration of Reactive Dyes by Laccase

2014 ◽  
Vol 12 (1) ◽  
pp. 63-70
Author(s):  
Li DING ◽  
Tieling XING ◽  
Guoqiang CHEN
Keyword(s):  
Metal Ion ◽  
Reactive Dyes ◽  
Cod Removal ◽  
Brilliant Blue ◽  
Optimum Conditions ◽  
Colour Removal ◽  
Removal Rates

Five different structural reactive dyes (Reactive Brilliant Blue K-3R, Everacion Blue H-ERD, Moderzol Blue FBR, Atuzol Black B and Moderzol Blue HEGN) were treated with laccase (Denilite II US) in order to determine the optimum decolouration conditions. The experiments showed that laccase had distinct decolouration effects on these five dyes. Under optimum conditions, the colour removal rates of Everacion Blue H-ERD and Moderzol Blue HEGN were over 90%. Furthermore, the effects of different additives, such as acid ion, metal ion, and surfactants on the decolouration rate of Reactive Brilliant Blue K-3R were discussed. The results show that the decolouration rate is significantly promoted through the addition of Cu2+ and Al3+, while it is inactivated with Fe2+ and ion surfactants. Moreover, the COD removal rates of the five dyes are more than 75%.

Polyaluminium chloride and flocculation aids for colour removal from biologically treated textile mill effluent

2018 ◽  
Vol 9 (2) ◽  
pp. 150
Author(s):  
Gemima Santos Arcanjo ◽  
Pedro Henrique Guerra Alves ◽  
Rafael Kopschitz Xavier Bastos ◽  
Leonardo Oliveira Cordeiro
Keyword(s):  
Textile Mill ◽  
Colour Removal ◽  
Polyaluminium Chloride

The Adsorption Character of Kapok Fiber and Reactive Dyeing Technology on Modified Kapok Fiber

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900 ◽  
Author(s):  
Ying Ding ◽  
Zaisheng Cai ◽  
Liming Wang ◽  
Yong Shen ◽  
Qunyan Gao
Keyword(s):  
Reactive Dyes ◽  
Reactive Dye ◽  
Dye Uptake ◽  
Direct Dyes ◽  
Kapok Fiber ◽  
Reactive Dyeing ◽  
Wash Fastness ◽  
Fixation Ratio

The adsorption character of kapok fiber with direct dyes and the dyeing technology of cationic modified kapok fiber with reactive dyes were studied in this article. The results indicate that the optimal dyeing technique parameters for the cationic modified kapok fiber with the reactive dye Cibacron FN-R include 0.5~1% (o.w.f) of dyes, 15~20g·L-1 of NaCl, and 2g·L-1 of JFC with bath ratio of 1:50 at a dyeing temperature of 40°C for 30min. The dyed kapok fiber was fixed with 15~20g·L-1 of Na2CO3 for 60min. As a result, the dye-uptake, fixation ratio, wash fastness, friction fastness, and K/S of cationic modified kapok fabric were enhanced by above technique.

Adsorption Kinetics of Reactive Dyes on Silk with Octyl Butyl Dimethyl Ammonium Bromide as Accelerant

2012 ◽  
Vol 549 ◽  
pp. 278-282 ◽  
Author(s):  
Cheng Chen ◽  
Guang Xian Zhang ◽  
Feng Xiu Zhang ◽  
Hui Zheng
Keyword(s):  
Adsorption Kinetics ◽  
Dye Adsorption ◽  
Reactive Dyes ◽  
Second Order ◽  
Ammonium Bromide ◽  
Order Kinetic ◽  
Dye Uptake ◽  
Dimethyl Ammonium ◽  
Adsorption Rates ◽  
Kinetics Of

With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsorption rates of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive orange dye B-2RLN increased as temperature increased, and the activation energy of them were found respectively to be 28.42,13.14,32.90 kJ/mol.The positive values of and obtained indicated that reactive dyes adsorption with OBDAB as accelerant was an endothermic process. The conclusion showed OBDAB was a potential accelerant.

Colour Removal and the Effect of Reactive Dyes on Growth Substrate Utilization by an Unacclimated Ethanol-Enriched Anaerobic Culture

2010 ◽  
Vol 45 (3) ◽  
pp. 307-315 ◽  
Author(s):  
Debraj Bhattacharyya ◽  
Kripa S. Singh
Keyword(s):  
Competitive Inhibition ◽  
Anaerobic Bacteria ◽  
Reactive Dyes ◽  
Inhibitory Effect ◽  
Substrate Utilization ◽  
Growth Substrate ◽  
Anaerobic Culture ◽  
Colour Intensity ◽  
Colour Removal

Abstract The cultures from an ethanol-enriched anaerobic master culture reactor were dosed with 0, 50, 100, 200, 400, 800, and 1600 mg/L of a mixture of three Procion reactive dyes: Red MX-8B, Red MX-5B, and Orange MX-2R, in order to study the colour removal and the inhibitory effect of dyes on the methanogenic degradation of ethanol that was added as a cosubstrate. The reduction in colour intensity, measured at 514 nm, was found to be similar to a trial using an inactivated culture. These results indicate that removal of colour by the unacclimated anaerobic population is due to adsorption of the dyes on the biomass. The dyes caused a competitive inhibition at doses above 200 mg/L on utilization of ethanol by the anaerobic bacteria.

scholarly journals Technical-Scale Production of Cyanophycin with Recombinant Strains of Escherichia coli

2002 ◽  
Vol 68 (7) ◽  
pp. 3377-3384 ◽  
Author(s):  
Kay M. Frey ◽  
Fred B. Oppermann-Sanio ◽  
Holger Schmidt ◽  
Alexander Steinbüchel
Keyword(s):  
Escherichia Coli ◽  
Large Scale ◽  
Cell Mass ◽  
Extraction Procedure ◽  
Temperature Shift ◽  
Exponential Growth Phase ◽  
Acid Extraction ◽  
Scale Production ◽  
Mineral Salts ◽  
Cell Content

ABSTRACT By the use of Escherichia coli DH1 harboring cphA from Synechocystis sp. strain PCC6803, large-scale production of cyanophycin at 30- and 500-liter culture volumes was established. Transcription of cphA was controlled by the thermosensitive cI857 repressor, which enabled induction of cphA by a simple temperature shift in the culture fluid. Maximum cyanophycin cell content of up to 24% (wt/wt) of cellular dry matter was obtained by induction in the early exponential growth phase and cultivation of the cells in terrific broth complex medium. Synthesis of cyanophycin was found to be strongly dependent on the presence of complex components, and in mineral salts medium the cells synthesized and accumulated cyanophycin only if Casamino Acids were added. Cultivations were done at the 500-liter scale, allowing the provision of cell mass for the preparation of cyanophycin at the kilogram scale. Isolation of cyanophycin was achieved by a new acid extraction procedure which allowed large-scale purification of the polyamide from whole cells.

scholarly journals Kinetics of Reactive Dyed Pretreated Cotton Fabrics with and without using Salt

2019 ◽  
Vol 8 (4) ◽  
pp. 9723-9726
Keyword(s):  
Waste Water ◽  
Reactive Dyes ◽  
Cotton Fabrics ◽  
Cross Linking ◽  
Dye Uptake ◽  
Effluent Water ◽  
Particle Movement ◽  
Wash Fastness ◽  
Kinetics Of

Most of the cotton fabrics at present are dyeing using reactive dyes which requires large quantities of salt, further produce large amount of effluent load to the environment in the form of more salinity in the effluent water along with other pollutants. In order to reduce the salinity in the waste water lot of investigations were carried out. Cotton fabrics pretreated with chitosan were dyed with reactive dyes. Pretreated samples were dyed without using salt as an electrpolyte. The influence of pretreatment on kinetics in dye bath i.e rate of dye particle movement towards the fabric, wash fastness, rubbing fastness was determined. The results of this study shows that the pretreatment of cotton with chitosan increases dye uptake and shows good fastness to washing and rubbing same as that of conventional way of dyed samples. It was determined that chitosan was effective cross linking agent in salt-free dyeing of cotton fabrics.

Effect of the Fixation Treatment on the Staining Results of Reactive Dyes for Dyeing Bamboo

2014 ◽  
Vol 1078 ◽  
pp. 57-60
Author(s):  
Chun Wang ◽  
Xian Jun Li ◽  
Yun Li ◽  
Xi Yi Cheng ◽  
Xia He
Keyword(s):  
Processing Time ◽  
Treatment Time ◽  
Raw Materials ◽  
Reactive Dyes ◽  
Dye Uptake ◽  
Fixation Rate ◽  
Treatment Conditions ◽  
Variation Range ◽  
Fixation Treatment

In this article, the crushed bamboo bundles were pre-treated with dilute alkali were used as raw materials and then treated with reactive dyes. The influence of the fixing process including Na2CO3 concentration and processing time was studied systematically and an optimized fixing process for dyeing bamboo bundles was obtained. The results showed that:1）These two treatment conditions all can improve the dye uptake and fixation rate; 2）With the increasing of Na2CO3 concentration, the dye uptake and fixation rate are rises gradually and all be increased 20% most, then get the stabilizing when it is 20g / L; The fixation treatment time has little effect on the staining results with the variation range under 7%; 3）The most satisfactory effect could be obtained: The Na2CO3 concentration and processing time is 20g/L and 30min, respectively.

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