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

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dc.contributor.authorEduok, Samuel
dc.contributor.authorFerguson, Robert M. W.
dc.contributor.authorJefferson, Bruce
dc.contributor.authorVilla, Raffaella
dc.contributor.authorCoulon, Frederic
dc.date.accessioned2017-07-24T14:45:18Z
dc.date.available2017-07-24T14:45:18Z
dc.date.issued2017-07-23
dc.description.abstractTo 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.identifier.citationEduok S, Ferguson R, Jefferson B, et al., (2017) Aged-engineered nanoparticles effect on sludge anaerobic digestion performance and associated microbial communities. Science of The Total Environment, Volume 609, December 2017, pp. 232-241en_UK
dc.identifier.cris18079177
dc.identifier.issn0048-9697
dc.identifier.urihttp://dx.doi.org/10.1016/j.scitotenv.2017.07.178
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12230
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiosolidsen_UK
dc.subjectAnaerobic digestionen_UK
dc.subjectEngineered nanoparticlesen_UK
dc.subjectNano-tolerant Archaeaen_UK
dc.subjectInhibitory effecten_UK
dc.titleAged-engineered nanoparticles effect on sludge anaerobic digestion performance and associated microbial communitiesen_UK
dc.typeArticleen_UK

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