Separation processes based on colloidal gas aphrons for the recovery of phenolic compounds

Giorgia Spigno, Dante Marco De Faveri, P. Jauregi

Risultato della ricerca: Contributo in libroContributo a convegno


This work presents the results of experimentations carried out to determine the main factors affecting the colloidal gas aphrons (CGA) separation of both standard (gallic acid) and real (a red grape marc extract) phenolic compounds and to gain a better insight into the separation mechanism. Batch mode trials were performed in a flotation column set-up (i.d. 4.2 cm, H 50.6 cm) investigating the influence of different parameters: volumetric (CGA/sample) ratio; pH; surfactant type and concentration. Results were evaluated in terms of recovery yield and quality of phenolic compounds in the aphron phase, and of separation factor. Data showed the potential of CGA to separate polyphenolic compounds from real plant extracts. Further research is in progress for optimisation of working parameters and employment of food-grade surfactants is in progress to develop low-cost purification processes for the production of bioactive ingredients.
Lingua originaleEnglish
Titolo della pubblicazione ospiteGRICU 2012 - Ingegneria Chimica: dalla nanoscala alla macroscala
Numero di pagine4
Stato di pubblicazionePubblicato - 2012
EventoGRICU 2012 - Montesilvano
Durata: 17 set 201219 set 2012


ConvegnoGRICU 2012


  • Antioxidant
  • colloidal gas aphrons
  • grape marc
  • polyphenols
  • surfactants

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