Harnessing biostimulants from biogas digestates for high-value resource recovery: a review

Sammanfattning

Improper disposal of organic waste leads to greenhouse gases, pollution, and health risks. Anaerobic digestion offers a sustainable solution by converting this waste into biogas and digestates, which contain valuable nutrients and stimulatory organic compounds that can be recycled to improve plant growth and support food production. Here we review the transformation of liquid and solid digestates into biostimulants by microalgal cultivation, vermicomposting, and insect-based bioconversion. These processes yield phytohormones, polysaccharides, betaines, humic substances, chitin, protein hydrolysates, and growth-promoting microbes, that enhance plant growth and resilience against environmental stresses. Due to the variability in digestate composition, we emphasize the need for optimized formulations, a deep understanding of synergistic interactions among bioactive compounds, and standardized extraction techniques to support broader applications.

Nyckelord

Bioconversion; Bioeconomy; Phytohormones; Microalgae; Sustainability; Vermicomposting; Waste management

Publicerad i

Environmental Chemistry Letters
2024
Utgivare: SPRINGER HEIDELBERG

SLU författare

• Sani, Md Nasir Hossain

  • Institutionen för biosystem och teknologi, Sveriges lantbruksuniversitet
    

• Bergstrand, Karl-Johan

  • Institutionen för biosystem och teknologi, Sveriges lantbruksuniversitet
    

• Caspersen, Siri

  • Institutionen för biosystem och teknologi, Sveriges lantbruksuniversitet
    

• Prade, Thomas

  • Institutionen för biosystem och teknologi, Sveriges lantbruksuniversitet
    

• Yong, Jean W.H

  • Institutionen för biosystem och teknologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Biokemi och molekylärbiologi
Miljöledning
Markvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1007/s10311-024-01801-8

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/139933