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| Date: | 2025 |
| Description: | 10 pàg. |
| Abstract: | The increasing global demand for agricultural production poses challenges to maintain the needs for critical fertilizers such as nitrogen. This study explores the potential of human urine as a source of renewable nitrogen for fertilizer production. Through a life cycle assessment, three different urine management strategies were compared: (S1) an artificial wetland, (S2) an on-site lab-scale aerobic reactor for nitrogen recovery, and (S3) a centralized wastewater treatment plant. While scenario S2 had the highest impacts in 6 out of 8 categories, an advantage in marine eutrophication was identified. S2 showed high energy demand (750 kg MJ-eq) and ecotoxicity (602 kg 1. 4-DCB-eq. ) mainly due to energy requirements. Nitrogen production exceeded 2. 3 times the yearly nitrogen demands of the building tomato production. Upscaling S2 reduces impacts up to 2 times, lowering the payback time from 29 to 13 years. Therefore, implementing large-scale nitrogen recovery systems in cities is encouraged. |
| Grants: | Agencia Estatal de Investigación TED2021-130047B-C21 Agència de Gestió d'Ajuts Universitaris i de Recerca 2023/Clima-00041 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00734 Ministerio de Ciencia e Innovación CEX2019-0940-M |
| Note: | Altres ajuts: acords transformatius de la UAB |
| Note: | Unidad de excelencia María de Maeztu CEX2019-000940-M |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Circular economy ; Decentralized wastewater treatment ; Industrial ecology ; Life cycle assessment ; Nitrogen fertilizer ; Resource recovery |
| Published in: | Resources, Conservation and Recycling, Vol. 212 (January 2025) , art. 107985, ISSN 1879-0658 |
10 p, 2.6 MB |