Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | REM. Revista Escola de Minas (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100077 |
Resumo: | Struvite crystallization as a technique for recovering nutrients from wastewater streams has proven to be an attractive alternative to conventional treatments. The process becomes economically viable with the cost reductions related to the chemical reagents, especially magnesium ions. Thus, this study assessed the processing of a cheap and high-grade industrial magnesia compound in obtaining magnesium hydroxide slurries through a hydration reaction using different hydrating agents (magnesium acetate and sodium chloride solutions and water). The optimum hydration condition was achieved in acetate solution with a conversion rate to hydroxide about 67%. The efficiency of the obtained slurries as alternative reagents on the struvite crystallization process was evaluated in terms of the nutrient removal, NH4+-N and PO43--P. In experimental conditions of Mg2+:NH4+:PO43-ratio equal to 1.5:1.0:1.25 and pH equal to 8.5, the best results were achieved by using the magnesium hydroxide slurry obtained in acetate solution, which promoted removals of about 62% and 67% of NH4+-N and PO43--P, respectively. Finally, instrumental analysis confirmed the formation of struvite crystals in a purity degree that allows its use as a potential fertilizer. |
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Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrientsIndustrial magnesia compoundHydration processMagnesia hydrationNutrient recoveryStruvite crystallizationStruvite crystallization as a technique for recovering nutrients from wastewater streams has proven to be an attractive alternative to conventional treatments. The process becomes economically viable with the cost reductions related to the chemical reagents, especially magnesium ions. Thus, this study assessed the processing of a cheap and high-grade industrial magnesia compound in obtaining magnesium hydroxide slurries through a hydration reaction using different hydrating agents (magnesium acetate and sodium chloride solutions and water). The optimum hydration condition was achieved in acetate solution with a conversion rate to hydroxide about 67%. The efficiency of the obtained slurries as alternative reagents on the struvite crystallization process was evaluated in terms of the nutrient removal, NH4+-N and PO43--P. In experimental conditions of Mg2+:NH4+:PO43-ratio equal to 1.5:1.0:1.25 and pH equal to 8.5, the best results were achieved by using the magnesium hydroxide slurry obtained in acetate solution, which promoted removals of about 62% and 67% of NH4+-N and PO43--P, respectively. Finally, instrumental analysis confirmed the formation of struvite crystals in a purity degree that allows its use as a potential fertilizer.Escola de Minas2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100077Rem: Revista Escola de Minas v.68 n.1 2015reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/0370-44672015680138info:eu-repo/semantics/openAccessCastro,Samuel RodriguesAraújo,Mahira Adna CotaLange,Liséte Celinaeng2015-10-09T00:00:00Zoai:scielo:S0370-44672015000100077Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2015-10-09T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse |
dc.title.none.fl_str_mv |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
title |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
spellingShingle |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients Castro,Samuel Rodrigues Industrial magnesia compound Hydration process Magnesia hydration Nutrient recovery Struvite crystallization |
title_short |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
title_full |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
title_fullStr |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
title_full_unstemmed |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
title_sort |
Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients |
author |
Castro,Samuel Rodrigues |
author_facet |
Castro,Samuel Rodrigues Araújo,Mahira Adna Cota Lange,Liséte Celina |
author_role |
author |
author2 |
Araújo,Mahira Adna Cota Lange,Liséte Celina |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Castro,Samuel Rodrigues Araújo,Mahira Adna Cota Lange,Liséte Celina |
dc.subject.por.fl_str_mv |
Industrial magnesia compound Hydration process Magnesia hydration Nutrient recovery Struvite crystallization |
topic |
Industrial magnesia compound Hydration process Magnesia hydration Nutrient recovery Struvite crystallization |
description |
Struvite crystallization as a technique for recovering nutrients from wastewater streams has proven to be an attractive alternative to conventional treatments. The process becomes economically viable with the cost reductions related to the chemical reagents, especially magnesium ions. Thus, this study assessed the processing of a cheap and high-grade industrial magnesia compound in obtaining magnesium hydroxide slurries through a hydration reaction using different hydrating agents (magnesium acetate and sodium chloride solutions and water). The optimum hydration condition was achieved in acetate solution with a conversion rate to hydroxide about 67%. The efficiency of the obtained slurries as alternative reagents on the struvite crystallization process was evaluated in terms of the nutrient removal, NH4+-N and PO43--P. In experimental conditions of Mg2+:NH4+:PO43-ratio equal to 1.5:1.0:1.25 and pH equal to 8.5, the best results were achieved by using the magnesium hydroxide slurry obtained in acetate solution, which promoted removals of about 62% and 67% of NH4+-N and PO43--P, respectively. Finally, instrumental analysis confirmed the formation of struvite crystals in a purity degree that allows its use as a potential fertilizer. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100077 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100077 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0370-44672015680138 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola de Minas |
publisher.none.fl_str_mv |
Escola de Minas |
dc.source.none.fl_str_mv |
Rem: Revista Escola de Minas v.68 n.1 2015 reponame:REM. Revista Escola de Minas (Online) instname:Escola de Minas instacron:ESCOLA DE MINAS |
instname_str |
Escola de Minas |
instacron_str |
ESCOLA DE MINAS |
institution |
ESCOLA DE MINAS |
reponame_str |
REM. Revista Escola de Minas (Online) |
collection |
REM. Revista Escola de Minas (Online) |
repository.name.fl_str_mv |
REM. Revista Escola de Minas (Online) - Escola de Minas |
repository.mail.fl_str_mv |
editor@rem.com.br |
_version_ |
1754122198989144064 |