Show simple item record

dc.contributor.authorRolph, Catherine A.
dc.contributor.authorJefferson, Bruce
dc.contributor.authorBrookes, Adam
dc.contributor.authorChoya, Andoni
dc.contributor.authorIceton, Gregg
dc.contributor.authorHassard, Francis
dc.contributor.authorVilla, R.
dc.date.accessioned2019-05-23T09:07:03Z
dc.date.available2019-05-23T09:07:03Z
dc.date.issued2019-05-21
dc.identifier.citationRolph, C.A., Villa, R., Jefferson, B., Brookes, A., Choya, A., Iceton, G., Hassard, H. (2019) From full-scale biofilters to bioreactors: Engineering biological metaldehyde removal. Science of The Total Environment, 685, pp. 410-418en
dc.identifier.issn0048-9697
dc.identifier.urihttps://www.dora.dmu.ac.uk/handle/2086/17871
dc.descriptionThe file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.en
dc.description.abstractPolar, low molecular weight pesticides such as metaldehyde are challenging and costly to remove from drinking water using conventional treatment methods. Although biological treatments can be effective at treating micropollutants, through biodegradation and sorption processes, only some operational biofilters have shown the ability to remove metaldehyde. As sorption plays a minor role for such polar organic micropollutants, biodegradation is therefore likely to be the main removal pathway. Here, the biodegradation of metaldehyde was monitored, and assessed, in an operational slow sand filter. Long-term data showed that metaldehyde degradation improved when inlet concentrations increased. A comparison of inactive and active sand batch reactors showed that metaldehyde removal happened mainly through biodegradation and that the removal rates were greater after the biofilm was acclimated through exposure to high metaldehyde concentrations. This suggested that metaldehyde removal was reliant on enrichment and that the process could be engineered to decrease treatment times (from days to hours). Through-flow experiments using fluidised bed reactors, showed the same behaviour following metaldehyde acclimation. A 40% increase in metaldehyde removal was observed in acclimated compared with non-acclimated columns. This increase was sustained for more than 40 days, achieving an average of 80% removal and compliance (< 0.1 µ L-1) for more than 20 days. An initial microbial analysis of the acclimated and non-acclimated biofilm from the same filter materials, showed that the microbial community in acclimated sand was significantly different. This work presents a novel conceptual template for a faster, chemical free, low cost, biological treatment of metaldehyde and other polar pollutants in drinking water. In addition, this is the first study to report kinetics of metaldehyde degradation in an active microbial biofilm at a WTW.en
dc.language.isoenen
dc.publisherElsevieren
dc.subjectmetaldehydeen
dc.subjectmicropollutant removalen
dc.subjectacclimationen
dc.subjectslow-sand filteren
dc.subjectfluidised-bed reactor.en
dc.titleFrom full-scale biofilters to bioreactors: engineering biological metaldehyde removalen
dc.typeArticleen
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2019.05.304
dc.peerreviewedYesen
dc.funderEPSRC (Engineering and Physical Sciences Research Council)en
dc.projectidSTREAM Industrial Doctorate Centre (Grant no. EP/L015412/1).en
dc.cclicenceCC-BY-NCen
dc.date.acceptance2019-05-20
dc.researchinstituteInstitute of Energy and Sustainable Development (IESD)en
dc.funder.otherAnglian Wateren
dc.funder.otherWRcen
dc.funder.otherYorkshire Wateren


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record