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High Potential Decolourisation of Textile Dyes from Wastewater by Manganese Peroxidase Production of Newly Immobilised Trametes hirsuta PW17-41 and FTIR Analysis

Summary

This research shows that a fungus called Trametes hirsuta can effectively clean textile industry wastewater by breaking down colorful dyes that pollute the environment. The scientists attached the fungus to nylon sponges and optimized the treatment conditions to achieve over 95% color removal within just two days. The fungus produces special enzymes, particularly manganese peroxidase, that degrade the harmful dyes into safer substances, and the system can be reused repeatedly for continuous wastewater treatment.

Background

Coloured wastewater from the textile industry is a significant environmental problem due to the presence of synthetic dyes that are toxic to aquatic ecosystems. Traditional physical and chemical treatment methods are expensive and produce problematic byproducts. White-rot fungi are considered promising microorganisms for biodegradation of synthetic dyes through production of ligninolytic enzymes.

Objective

This study aimed to select a high-potential white-rot fungal strain for decolourisation of mixed textile dyes from real industrial wastewater and to optimize conditions for immobilized fungal cell treatment. The research evaluated enzyme production mechanisms and confirmed biodegradation pathways using spectroscopic analysis.

Results

T. hirsuta PW17-41 achieved 95.39% dye decolourisation with optimal conditions using palm sugar and ammonium nitrate at pH 5 and 100 rpm. ADMI values decreased from 2475 to 114 within two days, reducing treatment time from seven days. Manganese peroxidase (4942 U L⁻¹) was the major enzyme involved in decolourisation, and immobilized cells maintained high efficiency over 12 repeated cycles.

Conclusion

Immobilized T. hirsuta PW17-41 demonstrated strong potential for removing high concentrations of textile dyes from industrial wastewater, meeting industrial effluent standards. The fungus effectively produced high levels of manganese peroxidase and laccase through biodegradation mechanisms. This approach offers a viable, cost-effective, and reusable biological treatment for textile dye remediation.
  • Published in:Microorganisms,
  • Study Type:Experimental Study,
  • Source: PMID: 35630435, PMCID: PMC9143691
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