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dc.contributor.author Tesfaye, T
dc.contributor.author Sithole, Bishop B
dc.contributor.author Ramjugernath, D
dc.date.accessioned 2019-05-07T06:24:24Z
dc.date.available 2019-05-07T06:24:24Z
dc.date.issued 2018-06
dc.identifier.citation Tesfaye, T., Sithole, B.B. & Ramjugernath, D. 2018. Valorisation of waste chicken feathers: Optimisation of decontamination and pre-treatment with bleaching agents using response surface methodology. Sustainable Chemistry and Pharmacy, Vol 8, pp. 21-37 en_US
dc.identifier.issn 2352-5541
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S2352554117300827
dc.identifier.uri https://doi.org/10.1016/j.scp.2018.02.003
dc.identifier.uri http://hdl.handle.net/10204/10976
dc.description Copyright: 2018 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract version of the full-text item. For access to the full-text item, please consult the publisher's website. The definitive version of the work is published in Sustainable Chemistry and Pharmacy, Vol 8, pp. 21-37 en_US
dc.description.abstract Environmental concerns, rapid oil consumption, the high price of oil, and limited oil reserves are driving research into cheap, biodegradable, sustainable, renewable, and abundantly available green materials. Waste chicken feathers are abundant and cheap by-products from poultry processing plants and their beneficiation offers possible solutions to these issues. Raw chicken feathers are wastes that are mixed with offal fat, debris, blood, preen oil and other wastes from the poultry process. Consequently, feathers are hazardous wastes that are contaminated with bacteria, which makes them odoriferous and unfit for valorisation as is. These contaminants must be removed before possible valorisation otherwise the feathers will not fit for purpose. The effects of oxidative (hydrogen peroxide and sodium hypochlorite) and reductive (Sodium dithionite) compounds as decontamination agents were studied on chicken feathers to assess their decontamination and pre-treatment efficiency and their effects on physicochemical and mechanical properties of the feathers. Statistically designed experiments were used to optimise the decontamination process using response surface methodology with a Box-Behnken experimental design. Regression equations were obtained to analyse microbial count and the optimum process parameters were identified. Under optimised conditions, the treated chicken feathers were characterised and their properties compared with those of unwashed chicken feathers. From the results, it was deduced that the inorganic bleaching treatments were effective removing the microbial impurities from the feathers and their use resulted in enhanced physicochemical properties of the chicken feathers. The untreated chicken feathers had the highest microbial counts (1.48E+ 07 ± 6.72E05 Cfu/g) whereas decontaminated samples showed a reduction in thousand-fold. The impurity removal after washing was about 8–18%. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;21963
dc.subject Feathers en_US
dc.subject Bleaching agents en_US
dc.subject Physicochemical properties en_US
dc.subject Microbial counts en_US
dc.subject Decontamination en_US
dc.title Valorisation of waste chicken feathers: Optimisation of decontamination and pre-treatment with bleaching agents using response surface methodology en_US
dc.type Article en_US


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