Integrated production of dual-function fertilizers from poultry litter incineration ash via sulfuric acid leaching: Linking ash fraction characteristics with nutrient recovery and agronomic functionality
Environmental Progress and Sustainable Energy, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/ep.70690
- Dergi Adı: Environmental Progress and Sustainable Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex, Environment Index, Greenfile, INSPEC, Natural Science Collection (ProQuest), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: basal fertilizer, biomass power plant waste, chicken manure ash, circular economy, top dressing fertilizer
- Ankara Üniversitesi Adresli: Evet
Özet
Sustainable recycling of biomass ash is critical for circular nutrient management, requiring proper modification before agricultural use. This study converted poultry litter-derived boiler ash (BA) and wet ash (WA) into basal and top-dressing fertilizers and evaluated their physicochemical properties, mineralogical changes, and agronomic performance. Both ashes were leached with sulfuric acid; the resulting filter cakes were treated with nitric acid to produce basal fertilizers with nutrient ratios expressed as N:P2O5:K2O (BABF 3.62:11.2:8.61; WABF 3.82:8.91:9.11), while ammonium nitrate was added to the leachates to obtain top-dressing fertilizers with nutrient ratios (BATF 19.3:2.47:10.1; WATF 21.2:2.93:7.72). Acid treatment reduced the highly alkaline pH (11.5–12.0) to acidic levels (pH <5) and increased electrical conductivity (EC) and water-soluble nutrients. Nitrogen (N) was enriched in top-dressing fertilizers (up to 21.2%), whereas phosphorus (P) remained higher in basal formulations. Fertilizer applications significantly increased plant dry weight (up to 79.9 g pot−1) compared to control (10.4 g pot−1) and conventional fertilization (72.3 g pot−1). Plant N, P, iron (Fe), and zinc (Zn) concentrations increased markedly, with BA-based treatments enhancing P and micronutrient uptake, and WA-based treatments promoting biomass production. Available-P, potassium (K), and Zn also increased after harvest. Ash-derived fertilizers improved plant growth and soil fertility, performing comparably or better than conventional fertilizers. Producing both basal and top-dressing fertilizers offers a promising strategy for sustainable nutrient recovery.