Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition
Ammonium, phosphorus, and potassium from wastewater treatment with a coexisting ion of calcium may be recovered simultaneously through struvite and struvite-(K) crystallization. This paper presents the quantitative assessment of the impact of calcium ions on the kinetics and crystallization of those...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Cogent Engineering |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/23311916.2022.2049962 |
| _version_ | 1797720141575749632 |
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| author | D. S. Perwitasari S. Muryanto J. Jamari A. P. Bayuseno |
| author_facet | D. S. Perwitasari S. Muryanto J. Jamari A. P. Bayuseno |
| author_sort | D. S. Perwitasari |
| collection | DOAJ |
| description | Ammonium, phosphorus, and potassium from wastewater treatment with a coexisting ion of calcium may be recovered simultaneously through struvite and struvite-(K) crystallization. This paper presents the quantitative assessment of the impact of calcium ions on the kinetics and crystallization of those crystals. Initial solutions containing dose levels of Ca2+ ion and pH 9 were set up for experiments in a stirred laboratory crystallization at ambient temperature. According to the pH reduction data, the observed precipitation kinetics followed in two steps; the first step (0–3 min) and the second step (3–60 min) in which linear regression analysis of both kinetic data fit with first-order rate constants. In the absence of calcium, the computed kinetic constants are respectively 2.568 h−1 for the first stage and 1.548 h−1 for the second stage. The kinetic rate constants followed with the increased dose of Ca (Ca/Mg > 0.5), which lengthened the crystallization of multiphase crystallization of Mg and Ca-phosphates. Accordingly, calcium had a negative effect on the morphology, purity, and quantity of the final crystalline product. This quantitative understanding of how calcium affects the crystallization of struvite and struvite-(K) reliably improves knowledge about controlling the quantity of wastewater recovery products. |
| first_indexed | 2024-03-12T09:15:01Z |
| format | Article |
| id | doaj.art-9947fdf1dbbc4a3f87c88f965d398564 |
| institution | Directory Open Access Journal |
| issn | 2331-1916 |
| language | English |
| last_indexed | 2024-03-12T09:15:01Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Cogent Engineering |
| spelling | doaj.art-9947fdf1dbbc4a3f87c88f965d3985642023-09-02T14:51:31ZengTaylor & Francis GroupCogent Engineering2331-19162022-12-019110.1080/23311916.2022.2049962Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical compositionD. S. Perwitasari0S. Muryanto1J. Jamari2A. P. Bayuseno3Department of Chemical Engineering, Universitas Pembangunan National “Veteran” Jawa Timur, Surabaya 60294 IndonesiaDepartment of Chemical Engineering UNTAG University in Semarang, Bendhan Dhuwur Campus, Semarang 50233, IndonesiaCentre for Waste Management, Department of Mechanical Engineering, Diponegoro University, Tembalang Campus, Semarang 50275, IndonesiaBrandenburgische Technische Universitat Cottbus-Senftenberg, GermanyAmmonium, phosphorus, and potassium from wastewater treatment with a coexisting ion of calcium may be recovered simultaneously through struvite and struvite-(K) crystallization. This paper presents the quantitative assessment of the impact of calcium ions on the kinetics and crystallization of those crystals. Initial solutions containing dose levels of Ca2+ ion and pH 9 were set up for experiments in a stirred laboratory crystallization at ambient temperature. According to the pH reduction data, the observed precipitation kinetics followed in two steps; the first step (0–3 min) and the second step (3–60 min) in which linear regression analysis of both kinetic data fit with first-order rate constants. In the absence of calcium, the computed kinetic constants are respectively 2.568 h−1 for the first stage and 1.548 h−1 for the second stage. The kinetic rate constants followed with the increased dose of Ca (Ca/Mg > 0.5), which lengthened the crystallization of multiphase crystallization of Mg and Ca-phosphates. Accordingly, calcium had a negative effect on the morphology, purity, and quantity of the final crystalline product. This quantitative understanding of how calcium affects the crystallization of struvite and struvite-(K) reliably improves knowledge about controlling the quantity of wastewater recovery products.https://www.tandfonline.com/doi/10.1080/23311916.2022.2049962kineticscalciumphosphorus and potassium recoverystruvitestruvite-(K) |
| spellingShingle | D. S. Perwitasari S. Muryanto J. Jamari A. P. Bayuseno Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition Cogent Engineering kinetics calcium phosphorus and potassium recovery struvite struvite-(K) |
| title | Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition |
| title_full | Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition |
| title_fullStr | Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition |
| title_full_unstemmed | Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition |
| title_short | Crystallization of struvite in the presence of calcium ions: Change in reaction rate, morphology and chemical composition |
| title_sort | crystallization of struvite in the presence of calcium ions change in reaction rate morphology and chemical composition |
| topic | kinetics calcium phosphorus and potassium recovery struvite struvite-(K) |
| url | https://www.tandfonline.com/doi/10.1080/23311916.2022.2049962 |
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