The use of ultraviolet radiation as a non-thermal treatment for the inactivation of alicyclobacillus acidoterrestris spores in water, wash water from a fruit processing plant and grape juice concentrate

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dc.contributor.authorGouws, Pieter A.
dc.contributor.authorCilliers, F P.
dc.contributor.authorWitthuhn, R C.
dc.contributor.authorGroenewald, W.H.
dc.date.accessioned2015-10-14T07:41:37Z
dc.date.available2015-10-14T07:41:37Z
dc.date.issued2013
dc.description.abstractAlicyclobacillus acidoterrestris is a non-pathogenic, spore-forming bacterium that can survive the commercial pasteurisation processes commonly used during fruit juice production. Surviving bacterial endospores germinate, grow and cause spoilage of high acid food products. Fruit juices can be treated using ultraviolet light (UV-C) with a wavelength of 254 nm, which has a germicidal effect against micro-organisms. In this study, A. acidoterrestris was inoculated into water, used wash water from a fruit processing plant and grape juice concentrate. Ultraviolet dosage levels (J L−1) of 0, 61, 122, 183, 244, 305 and 367 J L−1 were applied using a novel UV-C turbulent flow system. The UV treatment method was shown to reliably achieve in excess of a 4 log10 reduction (99.99%) per 0.5 kJ L-1 of UV-C dosage in all the liquids inoculated with A. acidoterrestris. The applied novel UV technology could serve as an alternative to thermal treatments of fruit juices for the inactivation of Alicyclobacillus spores as well as in the treatment of contaminated wash water used in fruit processing.en_US
dc.description.accreditationDepartment of HE and Training approved listen_US
dc.identifier.citationGroenewald, W.H. et al. (2013). The use of ultraviolent radiation as a non-thermal treatment for the inactivation of alicyclobacillus acidoterrestris spores in water, wash water from a fruit processing plant and grape juice concentrate. Journal for New Generation Science, 11 (2):19-32en_US
dc.identifier.issn1684-4998
dc.identifier.urihttp://hdl.handle.net/10566/1782
dc.language.isoenen_US
dc.privacy.showsubmitterfalse
dc.publisherCUT Free Stateen_US
dc.rightsCopyright UWC. This author final version is licensed under a creative commons attribution 4.0 international license.
dc.status.ispeerreviewedtrue
dc.subjectFruit juiceen_US
dc.subjectAlicyclobacillusen_US
dc.subjectSpoilageen_US
dc.subjectNon-thermal processingen_US
dc.subjectUltraviolet radiationen_US
dc.titleThe use of ultraviolet radiation as a non-thermal treatment for the inactivation of alicyclobacillus acidoterrestris spores in water, wash water from a fruit processing plant and grape juice concentrateen_US
dc.typeArticleen_US

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