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Immobilization and characterization of the mycelia-embedded polylysine-alginate beads and their decolorization

《化学科学与工程前沿（英文）》 2023年第17卷第12期页码 2001-2013 doi: 10.1007/s11705-023-2341-9

摘要： Liquid fermented fungal mycelia with decolorization capability have potential applications in scale-up. In this work, the Lactarius deliciosus mycelia were immobilized on -polylysine-alginate beads, and the decolorization effects of -polylysine-alginate beads were demonstrated along with Coomassie brilliant blue G-250 as a model dye. Morphology observation confirmed the beads had an exterior film and interior capsule with honeycomb microstructures suitable for mycelia growth. It was manifested that the maximum decolorization efficiency for mycelia was 98.5% at a removal rate of 0.68 mg·L^‒1·h after 3 days. In comparison, the decolorization efficiency of the immobilized mycelia reached the maximum value of 97.3% at a removal rate of 6.1 mg·L^‒1·h after 8 h. The enzyme activities of lignin peroxidase and laccase tested in the immobilized mycelia were significantly higher than in that of the free ones, such as the lignin peroxidase had the highest enzyme activity of 77.6 ± 7.4 U·L^‒1 in the former, while of 27.4 ± 8.7 U·L^‒1 in the latter. The immobilization of L. deliciosus mycelia could improve the decolorization of Coomassie brilliant blue G-250 efficiently. The prepared -polylysine-alginate beads embedded with L. deliciosus mycelia have very good reusability and a great potential in decolorizing analog dyes.

关键词： Lactarius deliciosus mycelia immobilization decolorization polylysine-alginate beads Coomassie brilliant blue G-250

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detoxification of the triphenylmethane dye coomassie brilliant blue by the extracellular enzymes from mycelia

Jin Zhao, Qing-Xi Wu, Xiao-Du Cheng, Ting Su, Xiao-Hui Wang, Wen-Na Zhang, Yong-Ming Lu, Yan Chen

《化学科学与工程前沿（英文）》 2021年第15卷第2期页码 421-436 doi: 10.1007/s11705-020-1952-7

摘要： Fungi play an important role in dying wastewater treatment. In this work, the mycelia of exhibited an excellent capacity in decolorizing coomassie brilliant blue (CBB). The results demonstrated that the mycelia could treat CBB with high concentrations over a broad range of pH and temperature. The decolorization rate of 99.19% and the removal rate of 16.31 mg·L ·h were realized. The mycelia could be recycled from decolorizing process for 19 times, indicating a good re-usability. It verified that the lignin peroxidase (121.65 U·L ) and manganese peroxidase (36.77 U·L ) were involved in the degradation and decolorization process of CBB. Toxicity assessments indicated the seed germination rate was up to 82.22% while inhibition to decreased dramatically and no significant effect on growth was found. The removal of CBB was a synergistic process accomplished by adsorption and biodegradation. The mycelia could be used for eco-friendly CBB treatment.

关键词： fungus mycelia biodegradation extracellular enzymes coomassie brilliant blue Lactarius deliciosus