| Texto completo | |
| Autor(es): |
Coombs, Orisa Z.
;
Joo, Taigyu
;
Botelho Junior, Amilton Barbosa
;
Chalise, Divya
;
Tarpeh, William A.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NATURE WATER; v. 3, n. 8, p. 22-pg., 2025-08-01. |
| Resumo | |
Distributed solar-enabled nitrogen capture from urine helps to manage the nitrogen cycle and increases fertilizer, sanitation and electricity access. Here we provide proof of concept for a photovoltaic-thermal electrochemical stripping (ECS) system, known as solar-ECS, that recovers ammonium sulfate fertilizer from real urine independently of the electricity grid. Constant control of photovoltaic currents and extracting waste heat to cool the solar panel while heating ECS enabled 59.3 +/- 3.6% more power production and improved ammonia recovery efficiency by 22.4 +/- 7.4% relative to prototypes with no heat transfer and uncontrolled currents. The added heat accelerated ammonia volatilization (the rate-limiting step of ECS), while preventing excessive current via charge controllers reduced energy use by 2.24 +/- 0.25 kJ g-1 N per excess milliampere per square centimetre. A new process model for ECS operation at different currents and temperatures was proposed and applied to estimate possible net fertilizer revenues of up to US$2.18 kg-1 N in US markets and US$4.13 kg-1 N in African markets. By advancing the recovery of high-purity commodity chemicals from underused wastewaters, this work supports United Nations Sustainable Development Goals for zero hunger, clean water and sanitation, clean energy and responsible production. (AU) | |
| Processo FAPESP: | 23/01032-5 - Separação de metais críticos através de membranas suportadas com líquidos: avaliação da interação sinérgica entre organofosforados e membranas |
| Beneficiário: | Amilton Barbosa Botelho Junior |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 19/11866-5 - Desenvolvimento de processos inovadores para recuperação de metais críticos |
| Beneficiário: | Denise Crocce Romano Espinosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |