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The role of pH on the biological struvite production in digested sludge dewatering liquors
Struvite production mediated by bacteria has opened up a new route for phosphorus recovery from wastewater streams but its application to digested sludge dewatering liquors is not yet well understood. This study investigates the growth and biological struvite production of selected bacteria in waste...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940904/ https://www.ncbi.nlm.nih.gov/pubmed/29740081 http://dx.doi.org/10.1038/s41598-018-25431-7 |
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author | Simoes, Francisco Vale, Peter Stephenson, Tom Soares, Ana |
author_facet | Simoes, Francisco Vale, Peter Stephenson, Tom Soares, Ana |
author_sort | Simoes, Francisco |
collection | PubMed |
description | Struvite production mediated by bacteria has opened up a new route for phosphorus recovery from wastewater streams but its application to digested sludge dewatering liquors is not yet well understood. This study investigates the growth and biological struvite production of selected bacteria in wastewater liquors with pHs between 5.7 to 9.1. The bacterial growth was assessed through flow cytometry. Bacillus pumilus, Halobacterium salinarum and Brevibacterium antiquum remained viable at pHs between 5.7 to 9.1 but B. antiquum was able to grow at pHs between 7.3 to 7.8. Further analysis allowed the identification of crystals as struvite in tests between pH 7.3 to 8.3. All strains were capable of producing struvite at a range of pHs, but the highest production of 135–198 mg/L was observed for pHs between 7.3 to 8.3. At pHs > 8.3, precipitation of struvite and calcium compounds was observed in inoculated and non-inoculated tests. This study demonstrates that biological struvite production can occur at a wide range of pHs, hence significantly different from chemical struvite precipitation that occurs at pH > 8.3, making it a potentially viable process for phosphorus recovery as struvite from wastewater streams and sludge liquors without strict pH control. |
format | Online Article Text |
id | pubmed-5940904 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-59409042018-05-14 The role of pH on the biological struvite production in digested sludge dewatering liquors Simoes, Francisco Vale, Peter Stephenson, Tom Soares, Ana Sci Rep Article Struvite production mediated by bacteria has opened up a new route for phosphorus recovery from wastewater streams but its application to digested sludge dewatering liquors is not yet well understood. This study investigates the growth and biological struvite production of selected bacteria in wastewater liquors with pHs between 5.7 to 9.1. The bacterial growth was assessed through flow cytometry. Bacillus pumilus, Halobacterium salinarum and Brevibacterium antiquum remained viable at pHs between 5.7 to 9.1 but B. antiquum was able to grow at pHs between 7.3 to 7.8. Further analysis allowed the identification of crystals as struvite in tests between pH 7.3 to 8.3. All strains were capable of producing struvite at a range of pHs, but the highest production of 135–198 mg/L was observed for pHs between 7.3 to 8.3. At pHs > 8.3, precipitation of struvite and calcium compounds was observed in inoculated and non-inoculated tests. This study demonstrates that biological struvite production can occur at a wide range of pHs, hence significantly different from chemical struvite precipitation that occurs at pH > 8.3, making it a potentially viable process for phosphorus recovery as struvite from wastewater streams and sludge liquors without strict pH control. Nature Publishing Group UK 2018-05-08 /pmc/articles/PMC5940904/ /pubmed/29740081 http://dx.doi.org/10.1038/s41598-018-25431-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Simoes, Francisco Vale, Peter Stephenson, Tom Soares, Ana The role of pH on the biological struvite production in digested sludge dewatering liquors |
title | The role of pH on the biological struvite production in digested sludge dewatering liquors |
title_full | The role of pH on the biological struvite production in digested sludge dewatering liquors |
title_fullStr | The role of pH on the biological struvite production in digested sludge dewatering liquors |
title_full_unstemmed | The role of pH on the biological struvite production in digested sludge dewatering liquors |
title_short | The role of pH on the biological struvite production in digested sludge dewatering liquors |
title_sort | role of ph on the biological struvite production in digested sludge dewatering liquors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940904/ https://www.ncbi.nlm.nih.gov/pubmed/29740081 http://dx.doi.org/10.1038/s41598-018-25431-7 |
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