Melanoidin-containing wastewaters induce selective laccase gene expression in the white-rot fungus Trametes sp. I-62

González, Tania; Terrón, María C.; Lucas, Susana; Junca, Howard; Carbajo, José María; Zapico, Ernesto; Silva, Ricardo; Arana-Cuenca, Ainhoa; Téllez, Alejandro; González, Aldo

doi:10.1016/j.resmic.2007.10.005

Cited by 32 publications

(16 citation statements)

References 31 publications

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“…A complex non-specific ligninolytic enzyme system, which consists of peroxidases (lignin peroxidase and manganese peroxidase) secreted by these isolates was found to be associated with melanoidin degradation capabilities (Gonzalez et al 2008). In present study, the bacterial isolates RNBS1, RNBS3 and RNBS4 have shown the optimum level of enzyme production (*2 U ml -1 ) at the 96 h of incubation period (Fig.…”

Section: Enzyme Activity and Hplc Analysissupporting

confidence: 50%

Isolation and characterization of aerobic bacteria capable of the degradation of synthetic and natural melanoidins from distillery effluent

Bharagava

Chandra

Rai

2009

World J Microbiol Biotechnol

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Melanoidins, complex biopolymer of aminocarbonyl compounds are the major coloring and polluting constituents of distillery wastewaters. In this study, three aerobic melanoidin-degrading bacteria (RNBS1, RNBS3 and RNBS4) were isolated from soil contaminated with distillery effluent and characterized as Bacillus licheniformis (RNBS1), Bacillus sp. (RNBS3) and Alcaligenes sp. (RNBS4) by biochemical tests and 16S rRNA gene sequence analysis. The degradation of synthetic and natural melanoidins was studied by using the axenic and mixed bacterial consortium. Results have revealed that the mixed consortium was more effective compared to axenic culture decolorizing 73.79 and 69.83% synthetic and natural melanoidins whereas axenic cultures RNBS1, RNBS3 and RNBS4 decolorized 65.88, 62.56 and 66.10% synthetic and 52.69, 48.92 and 59.64% natural melanoidins, respectively. The HPLC analysis of degraded samples has shown reduction in peak areas compared to controls, suggesting that decrease in color intensity might be largely attributed to the degradation of melanoidins by isolated bacteria.

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Section: Enzyme Activity and Hplc Analysissupporting

confidence: 50%

Isolation and characterization of aerobic bacteria capable of the degradation of synthetic and natural melanoidins from distillery effluent

Bharagava

Chandra

Rai

2009

World J Microbiol Biotechnol

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“…Increased expression of laccase genes in Trametes sp. I-62 (lcc1 & lcc2) and basidiomycetous fungus NIOCC #2a upon exposure to MWW accompanied by enhanced color removal, suggested the involvement of laccase in the melanoidins metabolism (D'Souza et al 2006;González et al 2007).…”

Section: Biodegradation Of Molasses Based Wastewatermentioning

confidence: 99%

Recent developments in biodegradation of industrial pollutants by white rot fungi and their enzyme system

et al. 2008

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Increasing discharge and improper management of liquid and solid industrial wastes have created a great concern among industrialists and the scientific community over their economic treatment and safe disposal. White rot fungi (WRF) are versatile and robust organisms having enormous potential for oxidative bioremediation of a variety of toxic chemical pollutants due to high tolerance to toxic substances in the environment. WRF are capable of mineralizing a wide variety of toxic xenobiotics due to non-specific nature of their extracellular lignin mineralizing enzymes (LMEs). In recent years, a lot of work has been done on the development and optimization of bioremediation processes using WRF, with emphasis on the study of their enzyme systems involved in biodegradation of industrial pollutants. Many new strains have been identified and their LMEs isolated, purified and characterized. In this review, we have tried to cover the latest developments on enzyme systems of WRF, their low molecular mass mediators and their potential use for bioremediation of industrial pollutants.

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“…A few fungi colonies on 10 4 dilution plates and no colony on 10 5 dilution plates were found for the neutral reactor, while a few colonies on 10 7 dilution plates and no colony on 10 8 dilution plates were found for the acidic reactor on day 56. Higher density of fungi might have a positive effect on the color removal because certain species of fungi are representative degraders of persistent organic compounds (González et al, 2008). However, the relationship between higher fungi density in the acidic reactor and higher percentage removal of color observed in the acidic reactor was not confirmed because the activities and the species of fungi were not monitored in this study.…”

Section: Possible Mechanism For the Removal Of Colormentioning

confidence: 76%

“…(Tondee and Sirianuntapiboon, 2008) and Trametes sp. (González et al, 2008) are reported to be capable of removing melanoidins, though it is not easy to maintain the strain in the mixed-culture treatment system. The elimination of chemical oxygen demand (COD) and color in the treatment of molasses wastewater by membrane bioreactors (MBRs) is not complete (Yan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Removal of Color from Molasses Wastewater Using Membrane Bioreactor with Acidic Condition

Shahata

Omata

Urase

2013

J. of Wat. ^|^ Envir. Tech.

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The advantage of acidic operation below pH of 3 in membrane bioreactors (MBRs) for the treatment of molasses wastewater was examined. Stable operation of both an acidic reactor and a neutral pH reactor was observed for 91 days. Percent COD removal was 48.5% for the acidic reactor and 63.6% for the neutral pH reactor when biologically pretreated molasses wastewater was fed to the reactors. Higher percentage removals of COD (89.0% for the neutral pH reactor and 84.0% for the acidic reactor) were observed, when molasses wastewater (COD 650 mg/L) was directly fed to the reactor because of higher concentration of biologically degradable organic matter in the feed solution. In spite of lower percentage of COD removal in the acidic reactor, higher percentage of color removal was observed spectrophotometrically with the low pH operation. Higher percentage of color removal in the acidic reactor was probably due to the enhanced adsorption of colored substances in the acidic environment followed by gradual biological degradation.

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Melanoidin-containing wastewaters induce selective laccase gene expression in the white-rot fungus Trametes sp. I-62

Cited by 32 publications

References 31 publications

Isolation and characterization of aerobic bacteria capable of the degradation of synthetic and natural melanoidins from distillery effluent

Isolation and characterization of aerobic bacteria capable of the degradation of synthetic and natural melanoidins from distillery effluent

Recent developments in biodegradation of industrial pollutants by white rot fungi and their enzyme system

Removal of Color from Molasses Wastewater Using Membrane Bioreactor with Acidic Condition

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