Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition
The treatment of landfill leachate, due to its great polluting load, is a very difficult task. In particular, the abatement of high ammonium concentrations represents one of the main issues. Among the available techniques, struvite precipitation is an effective method for the removal and recovery of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-11-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/6/11/375 |
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| author | Alessio Siciliano Maria Assuntina Stillitano Carlo Limonti Francesco Marchio |
| author_facet | Alessio Siciliano Maria Assuntina Stillitano Carlo Limonti Francesco Marchio |
| author_sort | Alessio Siciliano |
| collection | DOAJ |
| description | The treatment of landfill leachate, due to its great polluting load, is a very difficult task. In particular, the abatement of high ammonium concentrations represents one of the main issues. Among the available techniques, struvite precipitation is an effective method for the removal and recovery of NH4+ load. However, due to the lack of phosphorus and magnesium amounts, the struvite formation results in an expensive process in the leachate treatment. To overcome this issue, in the present work, we developed a simple and suitable method for ammonium removal by the multiple recycling of struvite decomposition residues. In this regard, a procedure for acid dissolution of struvite, produced by using industrial grade reagents, was initially defined. The effect of pH, temperature, and acid type was investigated. The experimental results proved the effectiveness of both hydrochloric and acetic acid, which allow a high and selective release of ammonium at T = 50 °C and pH = 5.5. The multiple reuse of decomposition products, combined with the supplementation of a small quantity of phosphorus and magnesium at molar ratios of n(N):n(Mg):n(P) = 1:0.05:0.05, guarantees stable NH4+ abatement of about 82%. The proposed process allows a cost saving of around to 74% and can be easily applied in industrial treatment plants. |
| first_indexed | 2024-12-12T07:55:26Z |
| format | Article |
| id | doaj.art-bd556cf81e214731931b6c7ef804be73 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T07:55:26Z |
| publishDate | 2016-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-bd556cf81e214731931b6c7ef804be732022-12-22T00:32:20ZengMDPI AGApplied Sciences2076-34172016-11-0161137510.3390/app6110375app6110375Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid DecompositionAlessio Siciliano0Maria Assuntina Stillitano1Carlo Limonti2Francesco Marchio3Department of Environmental and Chemical Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, 87036 Rende, ItalyEconet Srl, 88046 Lamezia Terme, ItalyThe treatment of landfill leachate, due to its great polluting load, is a very difficult task. In particular, the abatement of high ammonium concentrations represents one of the main issues. Among the available techniques, struvite precipitation is an effective method for the removal and recovery of NH4+ load. However, due to the lack of phosphorus and magnesium amounts, the struvite formation results in an expensive process in the leachate treatment. To overcome this issue, in the present work, we developed a simple and suitable method for ammonium removal by the multiple recycling of struvite decomposition residues. In this regard, a procedure for acid dissolution of struvite, produced by using industrial grade reagents, was initially defined. The effect of pH, temperature, and acid type was investigated. The experimental results proved the effectiveness of both hydrochloric and acetic acid, which allow a high and selective release of ammonium at T = 50 °C and pH = 5.5. The multiple reuse of decomposition products, combined with the supplementation of a small quantity of phosphorus and magnesium at molar ratios of n(N):n(Mg):n(P) = 1:0.05:0.05, guarantees stable NH4+ abatement of about 82%. The proposed process allows a cost saving of around to 74% and can be easily applied in industrial treatment plants.http://www.mdpi.com/2076-3417/6/11/375ammonium removallandfill leachatestruvitewastewater treatment |
| spellingShingle | Alessio Siciliano Maria Assuntina Stillitano Carlo Limonti Francesco Marchio Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition Applied Sciences ammonium removal landfill leachate struvite wastewater treatment |
| title | Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition |
| title_full | Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition |
| title_fullStr | Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition |
| title_full_unstemmed | Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition |
| title_short | Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition |
| title_sort | ammonium removal from landfill leachate by means of multiple recycling of struvite residues obtained through acid decomposition |
| topic | ammonium removal landfill leachate struvite wastewater treatment |
| url | http://www.mdpi.com/2076-3417/6/11/375 |
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