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Use of Anaerobic Digestate Inoculated with Fungi as a Soil Amendment for Soil Remediation: A Systematic Review

Summary

This research examines how using fungi-treated digestate (a byproduct from biogas production) can clean polluted soil more effectively than using either alone. The study shows that combining digestate with fungi successfully removes heavy metals like lead and cadmium from soil while promoting plant growth. The best results came from using digestate made from cattle manure. This approach offers an affordable and sustainable way to restore contaminated soils.

Background

Anaerobic digestion produces biogas and digestate, a nutrient-rich byproduct. Mycoremediation uses fungi to remove soil contaminants. The combined application of digestates inoculated with fungi has been proposed as a cost-effective alternative for soil remediation.

Objective

This systematic review aims to analyze the effects of anaerobic digestates inoculated with fungi on pollutant removal, plant growth, and soil stabilization. The study examines the impact of biomass sources, fungal strains, and environmental conditions on remediation efficiency.

Results

Nine papers were selected for review. Heavy metal removal rates achieved 17% for Si, 40% for Cd, and up to 80% for Pb. Plant growth improvements up to 100% were reported with digestate application. Cattle manure digestates showed superior fungal colonization compared to co-digested materials. Antibiotics and PFAS showed low or no accumulation in fungi.

Conclusion

Combined application of digestates and fungi effectively reduces contaminants while improving soil structure. Biomass source significantly impacts digestate quality and fungal colonization. Fungal strain selection, environmental conditions, and specific contaminants must be carefully considered for successful site-specific remediation applications.
  • Published in:Biology (Basel),
  • Study Type:Systematic Review,
  • Source: 41300369
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