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Puig-Castellvi, F.; Midoux, C.; Guenne, A.; Conteau, D.; Franchi, O; Bureau, C.; Madigou, C.; Bouveresse, D.J.R.; Kroff, P.; Mazeas, L.; Rutledge, D.N.; Gaval, G.; Chapleur, O. |
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Metataxonomics, metagenomics and metabolomics analysis of the influence of temperature modification in full-scale anaerobic digesters |
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2022 |
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Bioresource Technology |
Abbreviated Journal |
Bioresour. Technol. |
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346 |
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126612 |
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Metagenomics; Sub-mesophilic; Metabolomics; Full-scale; Chemometrics |
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Full-scale anaerobic digesters' performance is regulated by modifying their operational conditions, but little is known about how these modifications affect their microbiome. In this work, we monitored two originally mesophilic (35 degrees C) full-scale anaerobic digesters during 476 days. One digester was submitted to sub-mesophilic (25 degrees C) conditions between days 123 and 373. We characterized the effect of temperature modification using a multi-omics (metataxonomics, metagenomics, and metabolomics) approach. The metataxonomics and metagenomics results revealed that the lower temperature allowed a substantial increase of the sub-dominant bacterial population, destabilizing the microbial community equilibrium and reducing the biogas production. After restoring the initial mesophilic temperature, the bacterial community manifested resilience in terms of microbial structure and functional activity. The metabolomic signature of the sub-mesophilic acclimation was characterized by a rise of amino acids and short peptides, suggesting a protein degradation activity not directed towards biogas production. |
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0960-8524 |
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WOS:000744049300010 |
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UAI @ alexi.delcanto @ |
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1533 |
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Sepulveda-Mardones, M.; Campos, J.L.; Magri, A.; Vidal, G. |
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Moving forward in the use of aerobic granular sludge for municipal wastewater treatment: an overview |
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2019 |
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Reviews In Environmental Science And Bio-Technology |
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Rev. Environ. Sci. Bio-Technol. |
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18 |
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4 |
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741-769 |
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Aerobic granular sludge; Domestic sewage; Full-scale; Wastewater treatment plant |
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Activated sludge is one of the most widely implemented technologies for municipal wastewater treatment. Yet, more restrictive environmental standards demand for more efficient technologies. Aerobic granular sludge (AGS) is a promising alternative in this context since this technology has shown potential for simultaneous organic matter and nutrient removal using smaller bioreactors and consuming less energy. However, despite such engaging claims, only ca. 40 full-scale AGS systems have been installed worldwide after 30 years of development. This reduced implementation suggests the existence of significant bottlenecks for this technology, which currently only have partially been overcome. This overview aims to analyze the recent progress in R&D concerning aerobic sludge granulation for municipal wastewater treatment via the analysis of research articles and invention patents as well as to elucidate exiting technological gaps and development opportunities. Culturing methods aiming at fast granulation, long-term stability and excellent process performance are of utmost interest for promoting massive implementation of full-scale AGS systems. Moreover, the recovery of biomaterials from waste sludge could contribute to the implementation of the biorefinery paradigm in wastewater treatment plants. |
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[Sepulveda-Mardones, Mario; Vidal, Gladys] Univ Concepcion, Engn & Biotechnol Environm Grp, Environm Sci Fac, Concepcion, Chile, Email: glvidal@udec.cl |
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Springer |
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English |
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1569-1705 |
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WOS:000490631800001 |
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UAI @ eduardo.moreno @ |
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1089 |
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