Title:
Olive Oil Mill Wastewater Treatment through a Combined Process Based on Chemical Flocculation and Green Microalgae Scenedesmus Obliquus Culture
Author(s):
Hodaifa, G., De La Vega Cuevas, M., Malvis, A., Maaitah, M., Sanchez, S.
Document(s):
Paper
Slide presentation
Abstract:
The olive oil industry generates annually around 30 million m3 of olive-oil mill wastewaters (OMW). Untreated OMW constitutes an environmental concern in the Mediterranean area due to the large amounts that are generated and OMW physicochemical properties, characterized by a high content in organic matter, suspended solids, unpleasant odor and dark color. A new treatment process for OMW based on chemical flocculation followed by the culture of the green microalgae Scenedesmus obliquus in OMW is proposed in this work. Experiments were performed in batch photo-bioreactors (1 L work capacity) at laboratory scale. Different concentrations of OMW in ultrapure water were used as culture media (5, 10, 25, 50, 75 and 100% OMW, v/v). The operational conditions were: agitation rate = 200 rpm, T = 25 ºC, aeration rate = 0.5 L/min and continuous light with illumination intensity equal to 359 .E m-2 s-1. Results showed the ability of S. obliquus to grow in different OMW and remove nutrients. The final biomass obtained was characterized by high energetic compounds percentages. The treated water obtained after the process is suitable for its use in irrigation or to be reused in the olive oil extraction process.
Keywords:
batch reactor, biomass, microalgae, wastewater treatment
Topic:
Biomass Resources
Subtopic:
Algae production systems
Event:
27th European Biomass Conference and Exhibition
Session:
1CO.1.5
Pages:
119 - 123
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-1CO.1.5
Price:
FREE
