Recycling of Waste Cooking Oils: Variation of the Chemical Composition during Water Treatment

Alberto Mannu; Monica Ferro; Greta Colombo Dugoni; Walter Panzeri; Giacomo Luigi Petretto; Paolo Urgeghe; Andrea Mele

Working Paper Article Version 2 This version is not peer-reviewed

Version 1 : Received: 9 April 2019 / Approved: 11 April 2019 / Online: 11 April 2019 (08:55:22 CEST)
Version 2 : Received: 16 April 2019 / Approved: 16 April 2019 / Online: 16 April 2019 (11:19:15 CEST)

Samples of sunflower Waste Cooking Oils (WCOs) subjected to several cycles of frying were treated with water under four different combinations of temperature and pH. The variation of the chemical composition of the oil samples was monitored through headspace Solid-Phase Microextraction (HS-SPME) coupled with gas-chromatographic technique (GC), ¹H NMR spectroscopy and ESI⁺ mass spectrometry measurements. The possibility to modify the chemical composition of the recycled vegetable oil by tuning the water treatment parameters was exploited for the designing of a mini-plant for the production of bio-lubricants. A full description of the proposed prototype is also reported.

waste cooking oil; volatiles; 1H NMR; mass spectrometry; prototype

CHEMISTRY, Food Chemistry

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Recycling of Waste Cooking Oils: Variation of the Chemical Composition during Water Treatment

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