Simha, Prithvi
- Institutionen för energi och teknik, Sveriges lantbruksuniversitet
Sammanfattning
Human urine contributes up to 50 % of the phosphorus load in domestic wastewater. Decentralized sanitation systems that separately collect urine provide an opportunity to recover this phosphorus. In this study, we leveraged the unique and complex chemistry of urine in favor of recovering phosphorus as vivianite. We found that the type of urine affected the yield and purity of vivianite, but the kind of iron salt used, and reaction temperature, did not affect the yield and purity. Ultimately, it was the urine pH that affected the solubility of vivianite and other co-precipitates, with the highest yield (93 & PLUSMN; 2 %) and purity (79 & PLUSMN; 3 %) of vivianite obtained at pH 6.0. Yield and purity of vivianite were both maximized when Fe:P molar ratio was >1.5:1, but
Nyckelord
Decentralized sanitation; Fertilizers; Nutrient recycling; Resource recovery; Stabilization; Wastewater treatment
Publicerad i
Science of the Total Environment
2023, volym: 892, artikelnummer: 164517
Utgivare: ELSEVIER
SLU författare
Globala målen (SDG)
SDG6 Rent vatten och sanitet för alla
SDG12 Hållbar konsumtion och produktion
UKÄ forskningsämne
Vattenbehandlingsbioteknik
Publikationens identifierare
- DOI: https://doi.org/10.1016/j.scitotenv.2023.164517
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/123001