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Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite

Struvite precipitation from Wastewater involves an excess of ammonium to create a supersaturated initial solution. The remaining fraction can be a threat to the environment. This work combined struvite precipitation and ammonium sorption using natural zeolite to decrease the ammonium level in the ef...

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Autores principales: Numviyimana, Claver, Warchoł, Jolanta, Ligas, Bartosz, Chojnacka, Katarzyna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510139/
https://www.ncbi.nlm.nih.gov/pubmed/34640218
http://dx.doi.org/10.3390/ma14195822
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author Numviyimana, Claver
Warchoł, Jolanta
Ligas, Bartosz
Chojnacka, Katarzyna
author_facet Numviyimana, Claver
Warchoł, Jolanta
Ligas, Bartosz
Chojnacka, Katarzyna
author_sort Numviyimana, Claver
collection PubMed
description Struvite precipitation from Wastewater involves an excess of ammonium to create a supersaturated initial solution. The remaining fraction can be a threat to the environment. This work combined struvite precipitation and ammonium sorption using natural zeolite to decrease the ammonium level in the effluent. Two approaches of estimation of feed sample doses were used. One consisted of gradient experiments for ammonium precipitation to the asymptotic level and was combined with clinoptilolite to lower the ammonium level in the effluent. This approach used doses of 0.05:1.51:0.61:1 of Ca:Mg:NH(4)(+):PO(4)(3−) mole ratios, respectively. In contrast, three level design with narrowed NH(4)(+):PO(4)(3−) range reached 0.25:1.51:0.8:1 for Ca:Mg:NH(4)(+):PO(4)(3−) mole ratios. The addition of zeolite decreased effluent ammonium concentration. In both ways, the P and N recoveries were higher than 94% and 72%, respectively. The complexity of the precipitation mixture decreased the ammonium sorption capacity (Q(e)) of clinoptilolite from Q(e) of 0.52 to 0.10 meq∙g(−1) in single and complex solutions, respectively. Thermodynamically, the addition of 1.5 % of clinoptilolite changed the struvite precipitation spontaneity from ∆G of −5.87 to −5.42 kJ·mol(−1) and from 9.66 to 9.56 kJ·mol(−1) for gradient and three level experimental procedures, respectively. Thus, clinoptilolite demonstrated a positive effect on the struvite precipitation process and its environmental impact.
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spelling pubmed-85101392021-10-13 Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite Numviyimana, Claver Warchoł, Jolanta Ligas, Bartosz Chojnacka, Katarzyna Materials (Basel) Article Struvite precipitation from Wastewater involves an excess of ammonium to create a supersaturated initial solution. The remaining fraction can be a threat to the environment. This work combined struvite precipitation and ammonium sorption using natural zeolite to decrease the ammonium level in the effluent. Two approaches of estimation of feed sample doses were used. One consisted of gradient experiments for ammonium precipitation to the asymptotic level and was combined with clinoptilolite to lower the ammonium level in the effluent. This approach used doses of 0.05:1.51:0.61:1 of Ca:Mg:NH(4)(+):PO(4)(3−) mole ratios, respectively. In contrast, three level design with narrowed NH(4)(+):PO(4)(3−) range reached 0.25:1.51:0.8:1 for Ca:Mg:NH(4)(+):PO(4)(3−) mole ratios. The addition of zeolite decreased effluent ammonium concentration. In both ways, the P and N recoveries were higher than 94% and 72%, respectively. The complexity of the precipitation mixture decreased the ammonium sorption capacity (Q(e)) of clinoptilolite from Q(e) of 0.52 to 0.10 meq∙g(−1) in single and complex solutions, respectively. Thermodynamically, the addition of 1.5 % of clinoptilolite changed the struvite precipitation spontaneity from ∆G of −5.87 to −5.42 kJ·mol(−1) and from 9.66 to 9.56 kJ·mol(−1) for gradient and three level experimental procedures, respectively. Thus, clinoptilolite demonstrated a positive effect on the struvite precipitation process and its environmental impact. MDPI 2021-10-05 /pmc/articles/PMC8510139/ /pubmed/34640218 http://dx.doi.org/10.3390/ma14195822 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Numviyimana, Claver
Warchoł, Jolanta
Ligas, Bartosz
Chojnacka, Katarzyna
Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title_full Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title_fullStr Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title_full_unstemmed Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title_short Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite
title_sort nutrients recovery from dairy wastewater by struvite precipitation combined with ammonium sorption on clinoptilolite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510139/
https://www.ncbi.nlm.nih.gov/pubmed/34640218
http://dx.doi.org/10.3390/ma14195822
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