Sani, Md Nasir Hossain
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Review article2025Peer reviewedOpen access
Harnessing biostimulants from biogas digestates for high-value resource recovery: a review
Sani, Md. Nasir Hossain; Amin, Mehedi; Bergstrand, Karl-Johan; Caspersen, Siri; Prade, Thomas; Yong, Jean Wan Hong
Abstract
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.
Keywords
Bioconversion; Bioeconomy; Phytohormones; Microalgae; Sustainability; Vermicomposting; Waste management
Published in
Environmental Chemistry Letters
2025, volume: 23, number: 1, pages: 139-164
Publisher: SPRINGER HEIDELBERG
SLU Authors
Bergstrand, Karl-Johan
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Caspersen, Siri
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Prade, Thomas
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Yong, Jean W.H
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Global goals (SDG)
SDG9 Industry, innovation and infrastructure
SDG11 Sustainable cities and communities
SDG13 Climate action
UKÄ Subject classification
Biochemistry and Molecular Biology
Environmental Management
Soil Science
Publication identifier
- DOI: https://doi.org/10.1007/s10311-024-01801-8
Permanent link to this page (URI)
https://res.slu.se/id/publ/139933