Understanding why fat, oil and grease (FOG) bioremediation can be unsuccessful

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dc.cclicenceCC-BY-NC-NDen
dc.contributor.authorGurd, C.
dc.contributor.authorVilla, R.
dc.contributor.authorJefferson, B.
dc.date.acceptance2020-04-21
dc.date.accessioned2020-07-08T09:19:40Z
dc.date.available2020-07-08T09:19:40Z
dc.date.issued2020-05-01
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.abstractCommercial kitchen wastewaters are typically strong organic and fat-rich effluents, often identified as major contributors to fatberg formation and associated blockages in sewers. Experimental trials were done using synthetic kitchen wastewater to understand the complex reactions involved in microbial remediation in grease traps/separators prior discharge in sewers. The principle organic components (FOG, carbohydrate and protein nitrogen), were varied using ranges observed in a previous study on real kitchen wastewater characterisation. A model bacterium, Bacillus licheniformis NCIMB 9375, was used to evaluate microbial utilisation of the different organic fractions in relation to fat, oil and grease (FOG) degradation. Novel results in the treatment of these effluents showed that, the presence and concentration of alternative carbon sources and the ratio of carbon to nitrogen (COD:N) had great influence on FOG-degradation response. For example, FOG removal decreased from 24 to 10 mg/l/h when glucose was substitute for starch at equivalent concentrations (500mg/l); and from 26 to 5 mg/l/h when initial COD:N increased from 45:1 to 147:1. The dominant influence of COD:N was validated using a commercial bioadditive and real kitchen wastewater adjusted to different COD:N ratios, confirming the strong influence of kitchen wastewater composition on bioremediation outcomes. These results can therefore have major implications for biological management of FOG in kitchens and sewers as they provide a scientific explanation for bioremediation success or failure.en
dc.funderEPSRC (Engineering and Physical Sciences Research Council)en
dc.funder.otherFOG Ltden
dc.identifier.citationGurd C., Jefferson B. and Villa R. (2020) Understanding why fat, oil and grease (FOG) bioremediation can be unsuccessful. Journal of Environmental Management, 267: 110647en
dc.identifier.doihttps://doi.org/10.1016/j.jenvman.2020.110647
dc.identifier.urihttps://dora.dmu.ac.uk/handle/2086/19956
dc.language.isoenen
dc.peerreviewedYesen
dc.projectidSTREAM Industrial Doctorate Centre (Grant no. EP/ L015412/1)en
dc.publisherElsevieren
dc.researchinstituteInstitute of Energy and Sustainable Development (IESD)en
dc.subjectbioadditivesen
dc.subjectbioadditionsen
dc.subjectkitchen wastewateren
dc.subjectFOGen
dc.subjectfatbergen
dc.subjectlipidsen
dc.titleUnderstanding why fat, oil and grease (FOG) bioremediation can be unsuccessfulen
dc.typeArticleen

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