
Digestate with biochar: an organo-mineral composite for sustainable agriculture
Digestate with biochar and glauconite is an innovative organo-mineral composite for reducing nutrient losses, prolonged plant nutrition, and increasing soil fertility.
Uzbekistan faces a convergence of soil salinisation, declining organic matter, waterbody sedimentation, and industrial contamination that directly threatens agricultural sustainability. This study presents an integrated soil–water–biotechnology framework that links ecological restoration of waterbodies with soil fertility recovery through biologically activated sediments, microbial consortia, biosurfactants, mineral–organic carriers, and phytoremediation crops.
The framework builds upon AVELIFE comprehensive solutions for sustainable agriculture in Uzbekistan, which emphasize soil fertility restoration, stress-resistant crops, prolonged nutrient release, detoxification of soils, and active silicon as a structural and biological carrier. Experimental evidence from long-term bioremediation trials demonstrates that combined application of hydrocarbon-degrading microorganisms, rhamnolipid biosurfactants, calcium peroxide, and plants reduced oil contamination from 9.5% to 1.3–1.6%, increased soil dehydrogenase activity up to 2.7-fold, and decreased soil phytotoxicity more than 3.5 times.
The proposed model establishes a circular soil–water regeneration loop suitable for Uzbekistan’s arid agroecosystems and provides a scalable pathway for climate-resilient agriculture, land reclamation, and desert greening.
Uzbekistan’s agricultural sector operates under conditions of water scarcity, salinity stress, and long-term soil degradation. Large irrigation systems, intensive cotton and cereal production, and sediment accumulation in canals and reservoirs have created a coupled crisis of declining water quality and soil fertility.
Conventional reclamation practices focus primarily on chemical amendments and physical dredging. However, these approaches rarely address biological soil health, which is fundamental for long-term productivity.
Recent advances in environmental biotechnology demonstrate that soil biological activation—through microorganisms, biosurfactants, and plants—can restore degraded soils at significantly lower cost and environmental impact than physicochemical treatments.
The proposed framework integrates two traditionally separate domains:
Dredged bottom sediments, after ecological screening and biological activation, become carriers of organic matter, silicon, and nutrients, forming soil-improving substrates rather than waste.
AVELIFE technologies emphasize:

Biosurfactants, particularly rhamnolipids, enhance desorption and solubilisation of hydrophobic contaminants and increase microbial access to pollutants.
Experimental studies confirmed that integrated application of microbial consortia (Rhodococcus sp., Gordonia sp.), rhamnolipid biosurfactants, and calcium peroxide achieved:
These results validate biosurfactants as key activators of soil biological recovery.
AVELIFE formulations emphasize the role of active silicon as:
Plants absorb 70–700 kg/ha of silicon per season, making it a strategic element for arid agriculture
AVELIFE complex preparations exhibit prolonged action and cumulative effects, providing gradual nutrient release, formation of stable biocenosis, and long-term improvement of soil structure
This aligns with circular soil–water regeneration, where each restoration cycle strengthens the next.
The framework supports:
The Institute of Nanotechnologies and Organic Products “AVELIFE” expresses its strategic interest in expanding its technologies beyond Ukraine to contribute to global environmental stabilization and correction of ecological imbalances.
Uzbekistan is considered a priority partner country for implementing AVELIFE soil–water regeneration platforms through joint pilot projects, scientific cooperation, and localization of production.
Integration of waterbody restoration with biologically activated sediment reuse, biosurfactants, microbial consortia, active silicon, and phytoremediation forms a robust soil–water regeneration system suitable for Uzbekistan’s arid agroecosystems.
This approach shifts land restoration from chemical compensation toward biological regeneration, enabling sustainable productivity and long-term environmental resilience.
Tymur Lyevda¹, Andriy Banya², Olena Karpenko³
¹ Institute of Nanotechnologies and Organic Products AVELIFE, Ukraine
² Institute of Physical-Organic Chemistry and Coal Chemistry, NAS of Ukraine
³ Lviv Polytechnic National University

Digestate with biochar and glauconite is an innovative organo-mineral composite for reducing nutrient losses, prolonged plant nutrition, and increasing soil fertility.

Soil degradation and water pollution are increasingly merging into a combined environmental crisis, especially in arid and post-industrial regions.

Introduction Among the promising and ecologically acceptable methods of environmental restoration, priority is given to biological approaches (bioremediation, phytoremediation), i.e., the purification of soils and…