Assessing concentration changes of odorant compounds in the thermal-mechanical drying phase of sediment-likewastes from olive oil extraction
Hernández, Diógenes (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Quinteros-Lama, Héctor (Universidad de Talca. Escuela de Ingeniería (Chile))
Tenreiro, Claudio (Universidad de Talca. Escuela de Ingeniería (Chile))
Gabriel, David (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2019
Abstract:	In the industrial production of olive oil, both solid wastes and those produced from their incineration are a serious environmental problem since only 20% w/w of the fruit becomes oil and the rest is waste, mainly orujo and alperujo. A key aspect to transforming these wastes into an important source of energy such as pellets is to recognize the most appropriate time of the year for waste drying, with the objective of minimizing the environmental impact of the volatile compounds contained in the waste. In this work, the emissions produced during thermal-mechanical drying were studied throughout a period of six months of waste storage in which alperujo and orujo were stored in open containers under uncontrolled environmental conditions. The studied emissions were produced when both wastes were dried in a pilot rotary drying trommel at 450 °C to reduce their initial humidity of around 70-80% w/w to 10-15% w/w. Results indicated that when the storage time of the wastes in the uncontrolled environments increased, the emission of odorant compounds during drying also increased as a consequence of the biological and chemical processes occurring in the containers. The main odorant VOCs were quantified monthly for six months at the outlet of the drying trommel. It was determined that the drying of this type of waste could be carried out properly until the third month of storage. Afterwards, the concentration of most VOCs produced widely exceeded the odor thresholds of selected compounds.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Agroindustrial waste ; Alperujo and orujo ; Rotary dryer emissions ; Volatile organic compounds ; Biomass drying
Published in:	Applied sciences (Basel), Vol. 9, Issue 3 (February 2019) , art. 519, ISSN 2076-3417

DOI: 10.3390/app9030519

13 p, 1.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > GENOCOV
Articles > Research articles
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