Title:
Integrated Management of Sewage Sludge and Olive Oil Production Chain Waste: Improving Conversion Process into Biomethane
Author(s):
Fragoso, R., Henriques, A.C., Gominho, J., Ochando-Pulido, J.M., Duarte, E.
Document(s):
Paper
Poster
Abstract:
In a circular economy context, strategies for agro-industrial waste treatment should aim at bioenergy recovery, extraction of added-value compounds (e.g. phenolic compounds) and treated wastewater recycling. Furthermore, the management/treatment approach should take advantage of possible synergies along the production chain. Olive oil production is an important agro-industrial activity that produces large amounts of highly polluting wastes. The liquid fraction of these wastes includes effluents from: olives washing, the extraction process and olive oil washing. Beyond the production of liquid wastes, olive mills generate a solid waste (pomace) containing organic matter and moisture (60-70% in two-phase system and 30-45% in three-phase mills). Several treatment technologies have been applied to the above-mentioned waste streams, however there is still the need for an integrated solution along the production chain. This paper aims to propose a possible scenario of bioenergy recovery from two phase olive mill pomace. Special emphasis is given to anaerobic co-digestion process, selection of appropriate pre-treatment to promote organic matter bioavailability and optimization of feeding mixtures. From the combination of these aspects and the appropriate reactor operational conditions it is possible to maximize biomethane yield. Additionally, possible valorization of the co-products resulting from the proposed treatment will be suggested.
Keywords:
anaerobic digestion, bioenergy, agroindustrial residues, circular economy, sustainable olive oil production
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas and biomethane production
Event:
27th European Biomass Conference and Exhibition
Session:
2CV.8.31
Pages:
983 - 986
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-2CV.8.31
Price:
FREE
