Novel Materials for Myco-Decontamination of Cyanide-Containing Wastewaters through Microbial Biotechnology

Abstract:

This study examined the effectiveness of decontamination of industrial cyanide-containing water using mycelium-based lignocellulosic materials. These results suggest that fungi biomass and plant substrates can be used successfully in the treatment of wastewater contaminated by cyanide. Fungi were isolated from old wood samples taken from a tailing dam with high cyanide content (more than 20 years in semi-submerged condition). All isolated fungi belonged to the genus Fusarium. Fusarium oxysporum Schltdl. is most effective for biodegradation of cyanide-containing wastewaters (even at low temperatures). The most optimal lignocellulosic composition for production of mycelium-based biomaterial for biodegradation of cyanide wastewater consists of a uniform ratio of Siberian pine sawdust and wheat straw. The high efficiency of mycelium-based materials has been experimentally proven in vitro at 15-25 ° C. New fungal biomaterials are provide decrease in the concentration of cyanide ions to 79% (P <0.001). Large-scale cultivation of fungi biomass was carried out by the periodic liquid-phase cultivation. The submerged biomass from bioreactor was used as an inoculum for the production of mycelium-based materials for bioremediation of cyanide wastewater in situ (gold mine tailing).

• Periodical: Materials Science Forum (Volume 1037)
• Pages: 751-758
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1037.751
• Online since: July 2021
• Authors: Igor N. Pavlov*, Yulia A. Litovka
• Keywords: Biodegradation, Biotechnology, Cyanide Wastewater, Fusarium oxysporum, Mycelium-Based Materials

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