Blackwater sanitization with urea in Sweden
The increasing global population is placing pressure on the water resources and nutrients needed for food production, while increasing the amount of waste generated and the environmental contamination. Technical solutions and changes in the social perception of the environmental problems are needed...
| Autor principal: | |
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| Formato: | Second cycle, A2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2014
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| Acceso en línea: | https://stud.epsilon.slu.se/6945/ |
| _version_ | 1855571096047190016 |
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| author | Vidal Estévez, Brenda |
| author_browse | Vidal Estévez, Brenda |
| author_facet | Vidal Estévez, Brenda |
| author_sort | Vidal Estévez, Brenda |
| collection | Epsilon Archive for Student Projects |
| description | The increasing global population is placing pressure on the water resources and nutrients needed for food production, while increasing the amount of waste generated and the
environmental contamination. Technical solutions and changes in the social perception of the environmental problems are needed to address these problems.
The blackwater (wastewater from toilets only) represents the major proportion of the plant nutrients found in household wastewater (about 90 % of the phosphorous and nitrogen from the total effluent) and thus they should be recycled in order to close the nutrients loop in the environment. The aim of this research was to analyze the possible use of blackwater as fertilizer in agriculture by comparing three different scenarios: conventional wastewater
treatment, separate storage with addition of urea 1 % and separate storage with addition of urea 0.5 % and heat from different sources. The methodology included a system analysis to evaluate the environmental impact of the treatments, considering primary energy use, electricity use and global warming potential. Furthermore, a sanitation part was carried out in the laboratory as a pilot study by monitoring of indicator organisms over time in blackwater treated with 1 % urea. The urea added in situ is degraded into ammonium, which has a sanitization effect due partly to the increment of the pH that consequently inactivates
the pathogens. The results showed that the urea treatment was better than the conventional wastewater treatment both from environmental and sanitation perspective.
The indicator organisms studied in the lab showed good inactivation rates. The importance of this research relies on the possibility to minimize waste and environmental pollution, close the nutrients cycles by an efficient use of the available resources and, at the same time, decrease the demand of chemical fertilizers by the agricultural sector. In addition, an adequate sanitation process is ensured to reduce the hygienic risks associated. |
| format | Second cycle, A2E |
| id | RepoSLU6945 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2014 |
| publishDateSort | 2014 |
| record_format | eprints |
| spelling | RepoSLU69452014-07-16T13:00:33Z https://stud.epsilon.slu.se/6945/ Blackwater sanitization with urea in Sweden Vidal Estévez, Brenda Fertilizing Water resources and management Technology The increasing global population is placing pressure on the water resources and nutrients needed for food production, while increasing the amount of waste generated and the environmental contamination. Technical solutions and changes in the social perception of the environmental problems are needed to address these problems. The blackwater (wastewater from toilets only) represents the major proportion of the plant nutrients found in household wastewater (about 90 % of the phosphorous and nitrogen from the total effluent) and thus they should be recycled in order to close the nutrients loop in the environment. The aim of this research was to analyze the possible use of blackwater as fertilizer in agriculture by comparing three different scenarios: conventional wastewater treatment, separate storage with addition of urea 1 % and separate storage with addition of urea 0.5 % and heat from different sources. The methodology included a system analysis to evaluate the environmental impact of the treatments, considering primary energy use, electricity use and global warming potential. Furthermore, a sanitation part was carried out in the laboratory as a pilot study by monitoring of indicator organisms over time in blackwater treated with 1 % urea. The urea added in situ is degraded into ammonium, which has a sanitization effect due partly to the increment of the pH that consequently inactivates the pathogens. The results showed that the urea treatment was better than the conventional wastewater treatment both from environmental and sanitation perspective. The indicator organisms studied in the lab showed good inactivation rates. The importance of this research relies on the possibility to minimize waste and environmental pollution, close the nutrients cycles by an efficient use of the available resources and, at the same time, decrease the demand of chemical fertilizers by the agricultural sector. In addition, an adequate sanitation process is ensured to reduce the hygienic risks associated. 2014-06-30 Second cycle, A2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/6945/1/vidal_b_140630.pdf Vidal Estévez, Brenda, 2014. Blackwater sanitization with urea in Sweden : sanitization effect and environmental impact. Second cycle, A2E. Uppsala: (NL, NJ) > Dept. of Energy and Technology <https://stud.epsilon.slu.se/view/divisions/OID-565.html> urn:nbn:se:slu:epsilon-s-3414 eng |
| spellingShingle | Fertilizing Water resources and management Technology Vidal Estévez, Brenda Blackwater sanitization with urea in Sweden |
| title | Blackwater sanitization with urea in Sweden |
| title_full | Blackwater sanitization with urea in Sweden |
| title_fullStr | Blackwater sanitization with urea in Sweden |
| title_full_unstemmed | Blackwater sanitization with urea in Sweden |
| title_short | Blackwater sanitization with urea in Sweden |
| title_sort | blackwater sanitization with urea in sweden |
| topic | Fertilizing Water resources and management Technology |
| url | https://stud.epsilon.slu.se/6945/ https://stud.epsilon.slu.se/6945/ |