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Life cycle assessment of olive pomace valorisation through pyrolysis

Authors: Parascanu, Maria Magdalena; Puig Gamero, María; Sánchez Paredes, Paula; Soreanu, Gabriela; valverde, jose luis; SANCHEZ-SILVA, LUZ;

Life cycle assessment of olive pomace valorisation through pyrolysis

Abstract

A life cycle assessment (LCA) of the olive pomace valorisation by means of a pyrolysis system has been performed. The environmental impacts associated with three different stages were evaluated. The first stage is the olive production, the second stage is the olive oil extraction, where the by-product olive pomace is used as a raw material for the pyrolysis system. An LCA screening of the ecological versus the conventional route has been complementary evaluated. The pyrolysis system yields char, gases and tar, involving the following stages: biomass drying and grinding, pyrolysis, separation of gases and char, gas cooling by consecutively using an air heat exchanger followed of a water one, and the separation of gases and tar. For this study, 14 mid-point and 3 end-point impact categories were selected. The functional unit (FU) of 100 kg olive pomace was considered as an overall bench-mark approach. The obtained results reveal that the most environmental-friendly option was the ecological scenario. Therefore, only the biomass produced by this scenario was considered for a further pyrolysis system. The results showed the pyrolysis system can be considered an ecological tool for the valorisation of olive pomace, using energy-efficient equipment together with the water and air Se ha realizado un análisis del ciclo de vida (ACV) de la valorización del orujo de aceituna mediante un sistema de pirólisis . Se evaluaron los impactos ambientales asociados a tres etapas diferentes. La primera etapa es la producción de aceitunas, la segunda etapa es la extracción de aceite de oliva, donde el orujo de oliva subproducto se utiliza como materia prima para el sistema de pirólisis. Se ha evaluado complementariamente un cribado LCA de la vía ecológica frente a la convencional. El sistema de pirólisis produce carbonilla, gases y alquitrán, involucrando las siguientes etapas: secado y molienda de biomasa, pirólisis, separación de gases y carbonilla, enfriamiento de gas mediante el uso consecutivo de un intercambiador de calor de aire seguido de uno de agua, y la separación de gases y alquitrán. . Para este estudio, se seleccionaron 14 categorías de impacto de punto medio y 3 de punto final. La unidad funcional (UF) de 100 kg de orujo de aceituna se consideró como un enfoque de referencia general. Los resultados obtenidos revelan que la opción más amigable con el medio ambiente fue el escenario ecológico. Por lo tanto, solo la biomasa producida por este escenario se consideró para un sistema de pirólisis adicional. Los resultados mostraron que el sistema de pirólisis puede considerarse una herramienta ecológica para la valorización del orujo de aceituna, utilizando equipos energéticamente eficientes junto con la reutilización de agua y aire.

Country
Spain
Keywords

Life cycle assessment, Evaluación del ciclo de vida, Olive pomace, SimaPro software, Orujo de aceituna, Pirólisis, Life cycle assessment; Olive pomace; Pyrolysis; SimaPro software, Pyrolysis

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
50
Top 1%
Top 10%
Top 10%
Green
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