Aged-engineered nanoparticles effect on sludge anaerobic digestion performance and associated microbial communities

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dc.contributor.author Eduok, Samuel
dc.contributor.author Ferguson, Robert
dc.contributor.author Jefferson, Bruce
dc.contributor.author Villa, Raffaella
dc.contributor.author Coulon, Frederic
dc.date.accessioned 2017-07-24T14:45:18Z
dc.date.available 2017-07-24T14:45:18Z
dc.date.issued 2017-07-23
dc.identifier.citation Samuel Eduok, Robert Ferguson, Bruce Jefferson, Raffaella Villa, Frédéric Coulon, Aged-engineered nanoparticles effect on sludge anaerobic digestion performance and associated microbial communities, Science of The Total Environment, Volume 609, 31 December 2017, Pages 232-241 en_UK
dc.identifier.issn 0048-9697
dc.identifier.uri http://dx.doi.org/10.1016/j.scitotenv.2017.07.178
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/12230
dc.description.abstract To investigate the potential effect of aged engineered nanoparticles (a-ENPs) on sludge digestion performance, 150 L pilot anaerobic digesters (AD) were fed with a blend of primary and waste activated sludge spiked either with a mixture of silver oxide, titanium dioxide and zinc oxide or a mixture of their equivalent bulk metal salts to achieve a target concentration of 250, 2000, and 2800 mg kg− 1 dry weight, respectively. Volatile fatty acids (VFA) were 1.2 times higher in the spiked digesters and significantly different (p = 0.05) from the control conditions. Specifically, isovaleric acid concentration was 2 times lower in the control digester compared to the spiked digesters, whereas hydrogen sulfide was 2 times lower in the ENPs spiked digester indicating inhibitory effect on sulfate reducing microorganisms. Based on the ether-linked isoprenoids concentration, the total abundance of methanogens was 1.4 times lower in the ENPs spiked digester than in the control and metal salt spiked digesters. Pyrosequencing indicated 80% decrease in abundance and diversity of methanogens in ENPs spiked digester compared to the control digester. Methanosarcina acetivorans and Methanosarcina barkeri were identified as nano-tolerant as their relative abundance increased by a factor of 6 and 11, respectively, compared to the other digesters. The results further provide compelling evidence on the resilience of Fusobacteria, Actinobacteria and the Trojan horse-like effect of ENPs which offered a competitive advantage to some organisms while reducing microbial abundance and diversity. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format, Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subject Biosolids en_UK
dc.subject Anaerobic digestion en_UK
dc.subject Engineered nanoparticles en_UK
dc.subject Nano-tolerant Archaea en_UK
dc.subject Inhibitory effect en_UK
dc.title Aged-engineered nanoparticles effect on sludge anaerobic digestion performance and associated microbial communities en_UK
dc.type Article en_UK


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