scholarly journals Alkali treatment of fungal pretreated wheat straw for bioethanol production

Bioethanol ◽  
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
María García-Torreiro ◽  
Miguel Álvarez Pallín ◽  
María López-Abelairas ◽  
Thelmo A. Lu-Chau ◽  
Juan M. Lema
Keyword(s):  
Wheat Straw ◽  
Alkali Treatment ◽  
Alkaline Treatment ◽  
White Rot ◽  
White Rot Fungus ◽  
Process Conditions ◽  
Alkali Pretreatment ◽  
Irpex Lacteus ◽  
C 30 ◽  
Pretreated Wheat Straw

AbstractBioconversion of lignocellulosic materials into ethanol requires an intermediate pretreatment step for conditioning biomass. Sugar yields from wheat straw were previously improved by the addition of a mild alkali pretreatment step before bioconversion by the white-rot fungus Irpex lacteus. In this work, an alternative alkaline treatment, which significantly reduces water consumption, was implemented and optimized. Sugar recovery increased 117% with respect to the previously developed alkaline wash process at optimal process conditions (30°C, 30 minutes and 35.7% (w/w) of NaOH). In order to further reduce operational costs, a system for alkali recycling was implemented. This resulted in the treatment of 150% more wheat straw using the same amount of NaOH. Finally, enzymatic hydrolysis was optimized and resulted in a reduction of enzyme dose of 33%.

Irpex lacteus, a white-rot fungus with biotechnological potential — review

2009 ◽  
Vol 54 (5) ◽  
pp. 375-390 ◽  
Author(s):  
Č. Novotný ◽  
T. Cajthaml ◽  
K. Svobodová ◽  
M. Šušla ◽  
V. Šašek
Keyword(s):  
White Rot ◽  
White Rot Fungus ◽  
Irpex Lacteus ◽  
Biotechnological Potential

scholarly journals Characterization of Acetylxylan Esterase from White-Rot Fungus Irpex lacteus

2019 ◽  
Vol 66 (4) ◽  
pp. 131-137
Author(s):  
Sangho Koh ◽  
Seika Imamura ◽  
Naoto Fujino ◽  
Masahiro Mizuno ◽  
Nobuaki Sato ◽  
...  
Keyword(s):  
White Rot ◽  
White Rot Fungus ◽  
Irpex Lacteus ◽  
Acetylxylan Esterase

Bioremediation of the heavy metal complex dye Isolan Dark Blue 2SGL-01 by white rot fungus Irpex lacteus

2011 ◽  
Vol 198 ◽  
pp. 198-205 ◽  
Author(s):  
Duraisamy Kalpana ◽  
Jae Hong Shim ◽  
Byung-Taek Oh ◽  
Kalaiselvi Senthil ◽  
Yang Soo Lee
Keyword(s):  
Heavy Metal ◽  
Metal Complex ◽  
White Rot ◽  
White Rot Fungus ◽  
Irpex Lacteus ◽  
Dark Blue

Iron and calcium translocation from pure gypsum and iron-amended gypsum by two brown rot fungi and a white rot fungus

Holzforschung ◽  
2008 ◽  
Vol 62 (6) ◽  
Author(s):  
Jonathan S. Schilling ◽  
Kaitlyn M. Bissonnette
Keyword(s):  
Building Materials ◽  
Woody Debris ◽  
White Rot Fungi ◽  
Brown Rot ◽  
White Rot ◽  
White Rot Fungus ◽  
Irpex Lacteus ◽  
Brown Rot Fungi ◽  
Ca Oxalate ◽  
Iron And Calcium

AbstractWood-degrading fungi commonly grow in contact with calcium (Ca)-containing building materials and may import Ca and iron (Fe) from soil into forest woody debris. For brown rot fungi, imported Ca2+may neutralize oxalate, while Fe3+may facilitate Fenton-based degradation mechanisms. We previously demonstrated, in two independent trials, that degradation of spruce by wood-degrading fungi was not promoted when Ca or Fe were imported from gypsum or metallic Fe, respectively. Here, we tested pine wood with lower endogenous Ca than the spruce blocks used in prior experiments, and included a pure gypsum treatment and one amended with 1% with FeSO4. Electron microscopy with microanalysis verified that brown rot fungiSerpula himantioidesandGloeophyllum trabeumand the white rot fungusIrpex lacteusgrew on gypsum and produced iron-free Ca-oxalate crystals away from the gypsum surface. Wood cation analysis verified significant Fe import by both brown rot isolates in Fe-containing treatments. Wood degradation was highest in Fe-gypsum-containing treatments for all three fungi, although only wood degraded byI. lacteushad significant Ca import. We suggest that Fe impurities may not exacerbate brown rot, and that both brown and white rot fungi may utilize Ca-containing materials.

scholarly journals Factors Governing Degradation of Phenol in Pharmaceutical Wastewater by White-rot Fungi: A Batch Study

2015 ◽  
Vol 9 (1) ◽  
pp. 93-99 ◽  
Author(s):  
M. Bernats ◽  
T. Juhna
Keyword(s):  
Synthetic Medium ◽  
Biomass Concentration ◽  
White Rot Fungi ◽  
Total Phenol ◽  
White Rot ◽  
White Rot Fungus ◽  
Optimal Conditions ◽  
Pharmaceutical Wastewater ◽  
Irpex Lacteus ◽  
Low Efficiency

Phenol is a major contaminant in the industrial water effluent, including pharmaceutical wastewaters. Although several physic-chemical methods for removal of phenol exist, they are of high cost, low efficiency, and generate toxic by-products. Thus, there is a need to develop technologies for biological removal of phenol from wastewater. In this study, the degradation of phenol in pharmaceutical wastewater by monoculture of white-rot fungi was studied. The degradation rate of total phenol in batch flasks by four fungal monocultures of Trametes versicolor, Phanerochaete chrysosporium, Gloeophyllum trabeum and Irpex lacteus in synthetic medium was compared. The results showed that white-rot fungus T.Versicolor was the most effective of the species. Further selection tests of optimal conditions of biomass concentration, pH and temperature were done, indicating that optimal conditions of degradation are at pH 5-6, temperature 25 °C, and biomass inoculum 10% (v/v). Under optimal conditions, total phenol was reduced by 93%, concentration of total phenol decreasing from 420±12 mg/l to 29±1 mg/l in seven days, with T.Versicolor specie. This study suggested that biological treatment with fungi may effectively be used as a pre-treatment stage for removal of phenol before polishing wastewater with conventional biological methods.

scholarly journals Biological pretreatment of wheat straw: Effect of fungal culturing on enzymatic hydrolysis of carbohydrate polymers

2021 ◽  
Author(s):  
Aleksandar Knežević ◽  
Ivana Đokić ◽  
Tomislav Tosti ◽  
Slađana Popović ◽  
Dušanka Milojković-Opsenica ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Lignin Degradation ◽  
Enzymatic Saccharification ◽  
White Rot Fungi ◽  
Fungal Species ◽  
White Rot ◽  
Irpex Lacteus ◽  
Fungal Pretreatment ◽  
Hydrolysis Of

Abstract The aim of the study was comparative analysis of degradation of wheat straw lignin by white-rot fungi and its implications on the efficiency of enzymatic hydrolysis of holocellulose. Cyclocybe cylindracea, Ganoderma resinaceum, Irpex lacteus, Pleurotus ostreatus and Trametes versicolor were the species studied. Peroxidases were predominantly responsible for lignin degradation even though high laccase activities were detected, except in the case of Irpex lacteus where laccase activity was not detected. Studied fungal species showed various ability to degrade lignin in wheat straw which further affected release of reducing sugars during enzymatic saccharification. The highest rate of lignin degradation was noticed in sample pretreated with Irpex lacteus (50.9 ± 4.1%). Among all tested species only Ganoderma resinaceum was suitable lignin degrader with the 2-fold higher hydrolysis yield (51.1 ± 4.7%) than in the control, and could have significant biotechnological application due to lower cellulose loss. A key mechanism of carbohydrate component convertibility enhancement was lignin removal in the biomass. Long time consumption, the low sugar yields and unpredictable fungal response still remain the challenge of the fungal pretreatment process.

scholarly journals [Review: Symposium on Applied Glycoscience] Unique CBM1 of Xylanase Strongly Adsorbed on Cellulose from White rot Fungus, Irpex lacteus

2014 ◽  
Vol 4 (2) ◽  
pp. 154-159
Author(s):  
Hiroto Nishijima ◽  
Kouichi Nozaki ◽  
Masahiro Mizuno ◽  
Tsutomu Arai ◽  
Yoshihiko Amano
Keyword(s):  
Review Symposium ◽  
White Rot ◽  
White Rot Fungus ◽  
Irpex Lacteus
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