Roles of Lignin Peroxidase and Manganese Peroxidase from Phanerochaete chrysosporium in the Decolorization of Olive Mill Wastewaters

Sayadi, Sami; Ellouz, Radhouane

doi:10.1128/aem.61.3.1098-1103.1995

Cited by 172 publications

(45 citation statements)

References 42 publications

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“…Lignin peroxidase was the main enzyme implicated in P. chrysosporium OMW decolorization [16], whereas the major extracellular ligninolytic enzyme detected in P. flavido-alba OMWMP-added cultures (Fig. 1c) was MnP (LiP was not detected).…”

Section: The Role Of Extracellular Enzymes In Omw Decolorizationmentioning

confidence: 96%

“…Sephadex gel filtration was used to orientatively determine the molecular weight heterogeneity of OMW chromophoric material [3]. A decrease in the content of low (about 198 M r ) and high molecular weight components was observed in decolorized P. chrysosporium cultures [32], suggesting a correlation between OMW decolorization and depolymerization [16].…”

Section: Chromatography Of Decolorized Samplesmentioning

confidence: 99%

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Decolorization of olive oil mill wastewaters by Phanerochaete flavido‐alba

Hamman

Rubia

Martínez

1999

Enviro Toxic and Chemistry

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Olive oil mill wastewater (OMW), a major waste product of olive oil extraction, contains many recalcitrant compounds, mainly present in the colored fraction. In this study we attempted to identify optimum culture conditions for the decolorization of OMW by Phanerochaete flavido‐alba for subsequent use in bioremediation assays. Of several media tested, nitrogen‐limited P. flavido‐alba cultures containing 40 mg/L Mn(II) were the most efficient at decolorizing OMW. Decolorization was accompanied by a 90% decrease in the OMW phenolic content. Concentrated extracellular fluids alone (showing manganese peroxidase, but not lignin peroxidase activity) did not decolorize the major OMW pigment, suggesting that mycelium binding forms part of the decolorization process.

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Section: The Role Of Extracellular Enzymes In Omw Decolorizationmentioning

confidence: 96%

Section: Chromatography Of Decolorized Samplesmentioning

confidence: 99%

Decolorization of olive oil mill wastewaters by Phanerochaete flavido‐alba

Hamman

Rubia

Martínez

1999

Enviro Toxic and Chemistry

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“…Others attack both cellulose and lignin (white and soft rot fungi) [17,48,92,143]. The essential enzymes secreted and involved in the biodegradation lignin compounds during cultivation of various molds lignocellulosic materials are laccase, lignin-peroxidase, manganese-independent peroxidase and manganese-dependent peroxidase, the secretion of which is strain-dependent and is influenced by various culture conditions [17,[143][144][145][146][147][148][149][150]. The mild environmental conditions as also the low energy requirement are the advantages of this process.…”

Section: Lignocellulosic Biomassmentioning

confidence: 99%

Biotechnological production of ethanol: Biochemistry, processes and technologies

Sarris

Papanikolaou

2016

Engineering in Life Sciences

140

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The majority of environmental problems arise from the use of conventional energy sources. The liability of such problems along with the reduction of fossil energy resources has led to the global need for alternative renewable energy sources. Using renewable biofuels as energy sources is of remarkable and continuously growing importance. Producing bioethanol through conversion of waste and residual biomass can be a viable and important perspective. In the first part of this review, general concepts, approaches and considerations concerning the utilization of the most important liquid biofuels, namely biodiesel and bioethanol, are presented. Unlike biodiesel (specifically first generation biodiesel), the production of bioethanol is exclusively based on the utilization of microbial technology and fermentation engineering. In the second part of this review, the biochemistry of ethanol production, with regards to the use of hexoses, pentoses or glycerol as carbon sources, is presented and critically discussed. Differences in the glycolytic pathways between the major ethanol‐producing strains (Saccharomyces cerevisiae and Zymomonas mobilis) are presented. Regulation between respiration and fermentation in ethanol‐producing yeasts, viz. effects “Pasteur”, “Crabtree”, “Kluyver” and “Custers”, is discussed. Xylose and glycerol catabolism related with bioethanol production is also depicted and commented. The technology of the fermentation is presented along with a detailed illustration of the substrates used in the process and in pretreatment of lignocellulosic biomass, and the various fermentation configurations employed (separate hydrolysis and fermentation, simultaneous saccharification and fermentation, simultaneous saccharification and co‐fermentation and consolidated bioprocessing). Finally, the production of bioethanol under non‐aseptic conditions is presented and discussed.

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“…Huge amounts (6-7 million tons per year) of OMW are produced in the Mediterranean countries cultivating the olive tree (Olea europaea L., Oleaceae) [6]. These wastes are claimed to be one of the most polluting effluents among those produced by the agro-food industries, owing to their contents of organic substances (14-15%) and polyphenols (up to 10 g/L) [7]. The latter are characterized by high specific chemical oxygen demand (COD) [8,9] as well as their antibacterial [10] and phytotoxic effects [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of storage of olive mill wastewaters on hydroxytyrosol concentration

Feki

Allouche

Bouaziz

et al. 2006

Euro J Lipid Sci & Tech

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Effect of storage of olive mill wastewaters on hydroxytyrosol concentrationThis investigation was designed to determine the effect of olive mill wastewaters (OMW) storage on the continuous extraction of potentially high-added-value phenolic compounds from these effluents. Particular emphasis was made on the extraction of hydroxytyrosol, one of the major compounds occurring in OMW. The hydroxytyrosol concentration was constant in OMW supplemented with 10% ethanol during storage. However, with 5 and 0% ethanol, a noticeable increase was observed in the hydroxytyrosol concentration. At time zero, the main polyphenols detected in two samples of fresh OMW without ethanol addition were hydroxytyrosol, hydroxytyrosol-4-b-glucoside, 3,4-dihydroxyphenylacetic acid, p-coumaric acid, ferulic acid, oleuropein, and some other unidentified compounds. After 5 months of storage, significant accumulation of hydroxytyrosol was observed. The corresponding concentration increased from 0.98 to 3.5 g/L for the OMW sample collected in November 2004 and from 0.77 to 3.1 g/L for the sample collected in January 2006. However, the concentrations of the other phenolic compounds were markedly decreased. Furthermore, it was deduced that the OMW storage facilitates the continuous extraction procedure and improves the extraction yield of hydroxytyrosol. This last parameter increased from 85.5 to 96.8%.

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Roles of Lignin Peroxidase and Manganese Peroxidase from Phanerochaete chrysosporium in the Decolorization of Olive Mill Wastewaters

Cited by 172 publications

References 42 publications

Decolorization of olive oil mill wastewaters by Phanerochaete flavido‐alba

Decolorization of olive oil mill wastewaters by Phanerochaete flavido‐alba

Biotechnological production of ethanol: Biochemistry, processes and technologies

Effect of storage of olive mill wastewaters on hydroxytyrosol concentration

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