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Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies

Livestock slurry has been reported to be a potential secondary raw material as it contains macronutrients ‑nitrogen, phosphorus and potassium-, which could be valorised as high-quality fertilizers if proper separation and concentration of valuable compounds is performed. In this work, pig slurry liq...

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Autores principales: Rodríguez-Alegre, Rubén, Zapata-Jiménez, Julia, You, Xialei, Pérez-Moya, Montserrat, Sanchis, Sonia, García-Montaño, Julia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10060121/
https://www.ncbi.nlm.nih.gov/pubmed/36870507
http://dx.doi.org/10.1016/j.scitotenv.2023.162548
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author Rodríguez-Alegre, Rubén
Zapata-Jiménez, Julia
You, Xialei
Pérez-Moya, Montserrat
Sanchis, Sonia
García-Montaño, Julia
author_facet Rodríguez-Alegre, Rubén
Zapata-Jiménez, Julia
You, Xialei
Pérez-Moya, Montserrat
Sanchis, Sonia
García-Montaño, Julia
author_sort Rodríguez-Alegre, Rubén
collection PubMed
description Livestock slurry has been reported to be a potential secondary raw material as it contains macronutrients ‑nitrogen, phosphorus and potassium-, which could be valorised as high-quality fertilizers if proper separation and concentration of valuable compounds is performed. In this work, pig slurry liquid fraction was assessed for nutrient recovery and valorisation as fertilizer. Some indicators were used to evaluate the performance of proposed train of technologies within the framework of circular economy. As ammonium and potassium species are highly soluble at the whole pH range, a study based on phosphate speciation at pH from 4 to 8 was assessed to improve the macronutrients recovery from the slurry, resulting in two different treatment trains at acidic and alkaline conditions. The acidic treatment system based on centrifugation, microfiltration and forward osmosis was applied to obtain a nutrient-rich liquid organic fertilizer containing 1.3 % N, 1.3 % P(2)O(5) and 1.5 % K(2)O. The alkaline path of valorisation was composed by centrifugation and stripping by using membrane contactors to produce an organic solid fertilizer −7.7 % N, 8,0 % P(2)O(5) and 2.3 % K(2)O-, ammonium sulphate solution −1.4 % N- and irrigation water. In terms of circularity indicators, 45.8 % of the initial water content and <50 % of contained nutrients were recovered - 28.3 % N, 43.5 % P(2)O(5) and 46.6 % K(2)O - in the acidic treatment resulting in 68.68 g fertilizer per kg of treated slurry. 75.1 % of water was recovered as irrigation water and 80.6 % N, 99.9 % P(2)O(5), 83.4 % K(2)O was valorised in the alkaline treatment, as 219.60 g fertilizer per kg of treated slurry. Treatment paths at acidic and alkaline conditions yield promising results for nutrients recovery and valorisation as the obtained products (nutrient rich organic fertilizer, solid soil amendment and ammonium sulphate solution) fulfil the European Regulation for fertilizers to be potentially used in crop fields.
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spelling pubmed-100601212023-05-20 Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies Rodríguez-Alegre, Rubén Zapata-Jiménez, Julia You, Xialei Pérez-Moya, Montserrat Sanchis, Sonia García-Montaño, Julia Sci Total Environ Article Livestock slurry has been reported to be a potential secondary raw material as it contains macronutrients ‑nitrogen, phosphorus and potassium-, which could be valorised as high-quality fertilizers if proper separation and concentration of valuable compounds is performed. In this work, pig slurry liquid fraction was assessed for nutrient recovery and valorisation as fertilizer. Some indicators were used to evaluate the performance of proposed train of technologies within the framework of circular economy. As ammonium and potassium species are highly soluble at the whole pH range, a study based on phosphate speciation at pH from 4 to 8 was assessed to improve the macronutrients recovery from the slurry, resulting in two different treatment trains at acidic and alkaline conditions. The acidic treatment system based on centrifugation, microfiltration and forward osmosis was applied to obtain a nutrient-rich liquid organic fertilizer containing 1.3 % N, 1.3 % P(2)O(5) and 1.5 % K(2)O. The alkaline path of valorisation was composed by centrifugation and stripping by using membrane contactors to produce an organic solid fertilizer −7.7 % N, 8,0 % P(2)O(5) and 2.3 % K(2)O-, ammonium sulphate solution −1.4 % N- and irrigation water. In terms of circularity indicators, 45.8 % of the initial water content and <50 % of contained nutrients were recovered - 28.3 % N, 43.5 % P(2)O(5) and 46.6 % K(2)O - in the acidic treatment resulting in 68.68 g fertilizer per kg of treated slurry. 75.1 % of water was recovered as irrigation water and 80.6 % N, 99.9 % P(2)O(5), 83.4 % K(2)O was valorised in the alkaline treatment, as 219.60 g fertilizer per kg of treated slurry. Treatment paths at acidic and alkaline conditions yield promising results for nutrients recovery and valorisation as the obtained products (nutrient rich organic fertilizer, solid soil amendment and ammonium sulphate solution) fulfil the European Regulation for fertilizers to be potentially used in crop fields. Elsevier 2023-05-20 /pmc/articles/PMC10060121/ /pubmed/36870507 http://dx.doi.org/10.1016/j.scitotenv.2023.162548 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Rodríguez-Alegre, Rubén
Zapata-Jiménez, Julia
You, Xialei
Pérez-Moya, Montserrat
Sanchis, Sonia
García-Montaño, Julia
Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title_full Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title_fullStr Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title_full_unstemmed Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title_short Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
title_sort nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10060121/
https://www.ncbi.nlm.nih.gov/pubmed/36870507
http://dx.doi.org/10.1016/j.scitotenv.2023.162548
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