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Coelho MG, Franco DDM, Siqueira JCD, Ribeiro ICA, Crippa RA, Fia R, Matos MPD. Sewage phosphorus recovery through sachets loaded with water treatment plant sludge. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:922-931. [PMID: 37651329 PMCID: wst_2023_247 DOI: 10.2166/wst.2023.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Conventional wastewater treatment plants (WWTPs) present low phosphorus (P) removal capacity. Conversely, water treatment plants (WTPs) produce sludge with great P sorption from wastewater; however, directly adding the sludge into the wastewater treatment system could increase the effluent turbidity. As a novel approach, the present study evaluated the performance of WTP sludge within paper sachets for P removal from treated sewage. Different sludge concentrations (2-30 g L-1) and contact times (1-27 d) were applied to treat sewage from a university WWTP outlet. The sludge was characterized by P, Fe, and Al content. Larger sludge masses showed higher P removal efficiencies due to their high Fe content, especially at longer contact times (up to 100% at the final of the experiment). However, there is a more significant P reduction in the first 10 d (more than 90% in the most efficient treatment - 30 mg L-1). Based on the kinetic and isotherm analyses and the sludge chemical composition, precipitation proved to be a mechanism of great importance in P removal. Therefore, WTP sludge sachets can be a promising way to remove P from sewage, and the formed solid waste might be reused as an alternative fertilizer.
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Affiliation(s)
- Miriam Gabrielle Coelho
- Department of Environmental Engineering, Federal University of Lavras (UFLA), Lavras, MG 37200-900, Brazil E-mail:
| | - Débora de Melo Franco
- Department of Environmental Engineering, Federal University of Lavras (UFLA), Lavras, MG 37200-900, Brazil
| | - Juliano Curi de Siqueira
- Department of Hydraulics and Sanitation, São Carlos School of Engineering - University of São Paulo (EESC-USP), São Carlos, SP 13563-120, Brazil
| | | | - Rodolfo Appoloni Crippa
- Department of Environmental Engineering, Federal University of Lavras (UFLA), Lavras, MG 37200-900, Brazil
| | - Ronaldo Fia
- Department of Environmental Engineering, Federal University of Lavras (UFLA), Lavras, MG 37200-900, Brazil
| | - Mateus Pimentel de Matos
- Department of Environmental Engineering, Federal University of Lavras (UFLA), Lavras, MG 37200-900, Brazil
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Gubernat S, Masłoń A, Czarnota J, Koszelnik P, Chutkowski M, Tupaj M, Gumieniak J, Kramek A, Galek T. Removal of Phosphorus with the Use of Marl and Travertine and Their Thermally Modified Forms-Factors Affecting the Sorption Capacity of Materials and the Kinetics of the Sorption Process. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1225. [PMID: 36770230 PMCID: PMC9920275 DOI: 10.3390/ma16031225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/21/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
The paper presents new reactive materials, namely marl and travertine, and their thermal modifications and the Polonite® material, analyzing their phosphorus removal from water and wastewater by sorption. Based on the experimental data, an analysis of the factors influencing the sorption capacity of the materials, such as the material dose, pH of the initial solution, process temperature, surface structure, and morphology, was performed. Adsorption isotherms and maximum sorption capacities were determined with the use of the Langmuir, Freundlich, Langmuir-Freundlich, Tóth, Radke-Praunitz, and Marczewski-Jaroniec models. The kinetics of the phosphorus sorption process of the tested materials were described using reversible and irreversible pseudo-first order, pseudo-second order, and mixed models. The natural materials were the most sensitive to changes in the process conditions, such as temperature and pH. The thermal treatment process stabilizes the marl and travertine towards materials with a more homogeneous surface in terms of energy and structure. The fitted models of the adsorption isotherms and kinetic models allowed for an indication of a possible phosphorus-binding mechanism, as well as the maximum amount of this element that can be retained on the materials' surface under given conditions-raw marl (43.89 mg P/g), raw travertine (140.48 mg P/g), heated marl (80.44 mg P/g), heated travertine (282.34 mg P/g), and Polonite® (54.33 mg P/g).
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Affiliation(s)
- Sylwia Gubernat
- Doctoral School of Engineering and Technical Sciences at the Rzeszow University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland
- Inżynieria Rzeszów S.A., ul. Podkarpacka 59A, 35-082 Rzeszów, Poland
| | - Adam Masłoń
- Department of Environmental and Chemistry Engineering, Rzeszow University of Technology, Powstańców Warszawy 6, 35-959 Rzeszów, Poland
| | - Joanna Czarnota
- Department of Environmental and Chemistry Engineering, Rzeszow University of Technology, Powstańców Warszawy 6, 35-959 Rzeszów, Poland
| | - Piotr Koszelnik
- Department of Environmental and Chemistry Engineering, Rzeszow University of Technology, Powstańców Warszawy 6, 35-959 Rzeszów, Poland
| | - Marcin Chutkowski
- Department of Chemical and Process Engineering, Rzeszow University of Technology, Powstańców Warszawy 6, 35-959 Rzeszów, Poland
| | - Mirosław Tupaj
- Department of Component Manufacturing and Production Organization, Rzeszow University of Technology, ul. Kwiatkowskiego 4, 37-450 Stalowa Wola, Poland
| | - Justyna Gumieniak
- Department of Component Manufacturing and Production Organization, Rzeszow University of Technology, ul. Kwiatkowskiego 4, 37-450 Stalowa Wola, Poland
| | - Agnieszka Kramek
- Department of Component Manufacturing and Production Organization, Rzeszow University of Technology, ul. Kwiatkowskiego 4, 37-450 Stalowa Wola, Poland
| | - Tomasz Galek
- Department of Integrated Design Systems and Tribology, Rzeszow University of Technology, ul. Kwiatkowskiego 4, 37-450 Stalowa Wola, Poland
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