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

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dc.contributor.authorGurd, C.
dc.contributor.authorVilla, Raffaella
dc.contributor.authorJefferson, Bruce
dc.date.accessioned2020-05-01T14:54:38Z
dc.date.available2020-05-01T14:54:38Z
dc.date.issued2020-05-01
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 (500 mg/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_UK
dc.identifier.citationGurd C, Villa R, Jefferson J. (2020) Understanding why fat, oil and grease (FOG) bioremediation can be unsuccessful. Journal of Environmental Management, Volume 267, August 2020, Article number 110647en_UK
dc.identifier.issn0301-4797
dc.identifier.urihttps://doi.org/10.1016/j.jenvman.2020.110647
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15425
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectBioadditivesen_UK
dc.subjectBioadditionsen_UK
dc.subjectKitchen wastewateren_UK
dc.subjectFatbergen_UK
dc.subjectLipidsen_UK
dc.subjectFOGen_UK
dc.titleUnderstanding why fat, oil and grease (FOG) bioremediation can be unsuccessfulen_UK
dc.typeArticleen_UK

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