Phosphorus solubility and dynamics in a tropical soil under sources derived from wastewater and sewage sludge

Waste‐derived fertilizers can increase phosphorus uptake by sugarcane and availability in a tropical soil#

“…The higher soil labile P values observed for the struvite compared to the AshDec ® could be explained by the fact that the former presents (although very small) some solubility in water, and may be dissolved irrespective of plant activity after a certain time depending on environmental conditions, different from the AshDec ® , which is completely insoluble in water as reported in a previous study with the same sources (Raniro et al, 2022). This could have given struvite-treated plants a head start that allowed faster root development, plant establishment, and further increase rhizosphere activity, ultimately resulting in higher yield.…”

Sustainable Fertilizers: Publication Landscape on Wastes as Nutrient Sources, Wastewater Treatment Processes for Nutrient Recovery, Biorefineries, and Green Ammonia Synthesis

“…155,156 The AshDec process uses anaerobic stabilization of wastewater sludge followed by incineration to produce phosphate-rich ashes free of contamination with heavy metals such as Pb, As, and Cd. 157,158 The RecoPhos process is a thermochemical process for the generation of white phosphorus or phosphoric acid from sewage sludge ashes. Ash phosphates are formed and reduced to phosphorus in a thin film on the surface of coke particles; evaporation of the phosphorus then allows it to be isolated without further reactions.…”

“…Innovative technologies for developing sustainable fertilizers and nutrient delivery systems include the production of struvite and other fertilizer alternatives. − Integrated commercial processes of phosphorus recovery as struvite (such as the AirPrex, PEARL, AshDec, and RecoPhos processes) are commonly employed at wastewater treatment plants . The AirPrex process for struvite production subjects wastewater sludge to CO 2 stripping by aeration followed by addition of Mg salts in a reactor to form struvite. − Ostara’s PEARL is widely used for phosphorus recovery from municipal and industrial wastewater and occurs via the controlled precipitation of crystalline struvite. , The AshDec process uses anaerobic stabilization of wastewater sludge followed by incineration to produce phosphate-rich ashes free of contamination with heavy metals such as Pb, As, and Cd. , The RecoPhos process is a thermochemical process for the generation of white phosphorus or phosphoric acid from sewage sludge ashes. Ash phosphates are formed and reduced to phosphorus in a thin film on the surface of coke particles; evaporation of the phosphorus then allows it to be isolated without further reactions. − The innovative reactor used in the RecoPhos method allows the reduction of ash phosphates in the thin film on the surface of coke particles.…”

Precipitation of Potassium as Hazenite from Washing Water of Spent Alkaline Batteries

“…Like struvite and K-struvite, hazenite could also be suitable for fertilizer use [3,4]. In a recent study, hazenite released phosphorus slower than conventional commercial water-soluble fertilizers but faster than struvite [5]. Therefore, hazenite could be a potential phosphorus source for long-term release.…”