Waste-Derived Fertilizers: Conversion Technologies, Circular ... - MDPI
: Using waste products like biogas digestate and wood ash can be an efficient disposal method and an environmentally friendly alternative to mineral fertilizers, especially for acidic soils. Challenges Identified in the Research Combined Waste Resources as NPK Fertiliser
: The research demonstrates that combining wood ash (as a potassium source) with meat and bone meal (as a nitrogen and phosphorus source) can effectively provide primary nutrients for crops. Waste-Derived Fertilizers: Conversion Technologies, Circular
: Beyond just adding NPK, these combined waste resources provide organic matter that improves soil structure, microbial diversity, and water retention—benefits that synthetic fertilizers lack. Waste-Derived Fertilizers: Conversion Technologies