Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure

Ammonia and phosphate, which are present in large quantities in waste streams such as livestock manure, are key compounds in fertilization activities. Their recovery will help close natural cycles and take a step forward in the framework of a circular economy. In this work, a lab-scale three-chamber...

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Autores principales:	Míriam Cerrillo, Laura Burgos, Joan Noguerol, Victor Riau, August Bonmatí
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	struvite ammonia phosphate nutrient recovery livestock manure microbial electrolysis cell Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3c14a83c7179410181b99313900ba87a
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spelling	oai:doaj.org-article:3c14a83c7179410181b99313900ba87a2021-11-25T18:50:24ZAmmonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure10.3390/pr91119162227-9717https://doaj.org/article/3c14a83c7179410181b99313900ba87a2021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1916https://doaj.org/toc/2227-9717Ammonia and phosphate, which are present in large quantities in waste streams such as livestock manure, are key compounds in fertilization activities. Their recovery will help close natural cycles and take a step forward in the framework of a circular economy. In this work, a lab-scale three-chambered microbial electrolysis cell (MEC) has been operated in continuous mode for the recovery of ammonia and phosphate from digested pig slurry in order to obtain a nutrient concentrated solution as a potential source of fertilizer (struvite). The maximum average removal efficiencies for ammonium and phosphate were 20% ± 4% and 36% ± 10%, respectively. The pH of the recovered solution was below 7, avoiding salt precipitation in the reactor. According to Visual MINTEQ software modelling, an increase of pH value to 8 outside the reactor would be enough to recover most of the potential struvite (0.21 mmol L<sup>−1</sup> d<sup>−1</sup>), while the addition of up to 0.2 mM of magnesium to the nutrient recovered solution would enhance struvite production from 5.6 to 17.7 mM. The application of three-chambered MECs to the recovery of nutrients from high strength wastewater is a promising technology to avoid ammonia production through industrial processes or phosphate mineral extraction and close nutrient natural cycles.Míriam CerrilloLaura BurgosJoan NoguerolVictor RiauAugust BonmatíMDPI AGarticlestruviteammoniaphosphatenutrient recoverylivestock manuremicrobial electrolysis cellChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1916, p 1916 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	struvite ammonia phosphate nutrient recovery livestock manure microbial electrolysis cell Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	struvite ammonia phosphate nutrient recovery livestock manure microbial electrolysis cell Chemical technology TP1-1185 Chemistry QD1-999 Míriam Cerrillo Laura Burgos Joan Noguerol Victor Riau August Bonmatí Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
description	Ammonia and phosphate, which are present in large quantities in waste streams such as livestock manure, are key compounds in fertilization activities. Their recovery will help close natural cycles and take a step forward in the framework of a circular economy. In this work, a lab-scale three-chambered microbial electrolysis cell (MEC) has been operated in continuous mode for the recovery of ammonia and phosphate from digested pig slurry in order to obtain a nutrient concentrated solution as a potential source of fertilizer (struvite). The maximum average removal efficiencies for ammonium and phosphate were 20% ± 4% and 36% ± 10%, respectively. The pH of the recovered solution was below 7, avoiding salt precipitation in the reactor. According to Visual MINTEQ software modelling, an increase of pH value to 8 outside the reactor would be enough to recover most of the potential struvite (0.21 mmol L<sup>−1</sup> d<sup>−1</sup>), while the addition of up to 0.2 mM of magnesium to the nutrient recovered solution would enhance struvite production from 5.6 to 17.7 mM. The application of three-chambered MECs to the recovery of nutrients from high strength wastewater is a promising technology to avoid ammonia production through industrial processes or phosphate mineral extraction and close nutrient natural cycles.
format	article
author	Míriam Cerrillo Laura Burgos Joan Noguerol Victor Riau August Bonmatí
author_facet	Míriam Cerrillo Laura Burgos Joan Noguerol Victor Riau August Bonmatí
author_sort	Míriam Cerrillo
title	Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
title_short	Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
title_full	Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
title_fullStr	Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
title_full_unstemmed	Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure
title_sort	ammonium and phosphate recovery in a three chambered microbial electrolysis cell: towards obtaining struvite from livestock manure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3c14a83c7179410181b99313900ba87a
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Ammonium and Phosphate Recovery in a Three Chambered Microbial Electrolysis Cell: Towards Obtaining Struvite from Livestock Manure

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