Title:
Chlorella Pyrenoidosa Culture in Flocculated Olive Oil Mill Wastewater with the Double Benefit of Biomass Generation and Wastewater Treatment
Author(s):
Hodaifa, G., Malvis, A., Maaitah, M., Sánchez, S.
Document(s):
Paper
Poster
Abstract:
Olive oil mill wastewaters (OMWs) constitute the main waste of the olive oil industry, responsible of generating between 7×106 and 30×106 m3 of OMW in the Mediterranean countries every year. In addition to the large amounts of OMW generated, their physicochemical characteristics make their treatment extremely complicated and result in a great impact on the environment due to their high content of organic load, suspended solids, oil residues, etc. For this reason, seeking new treatment methods for these wastewaters represent nowadays an important challenge for the olive oil industry. This work presents a combined bioprocess for OMW treatment based on three stages: (i) flocculation-sedimentation, (ii) microfiltration with membrane and (iii) Chlorella pyrenoidosa culture in photobioreactors. After the two first stages, different OMW concentrations (5%, 10%, 25%, 50%, 75% and 100%, v/v) were used as C. pyrenoidosa culture media. The following experimental conditions were used: agitation rate = 200 rpm, T = 25şC, aeration rate = 0.5 L/min and continuous light with illumination intensity = 359 µE m-2 s-1. Results revealed that the process lead to significantly improve the final water quality, achieving high removal percentages of organic and inorganic compounds. Final biomass was characterized by an accumulation of high energetic compounds, mainly carbohydrates.
Keywords:
biodiesel, biomass, microalgae, wastewater treatment
Topic:
Sustainable Resources for Decarbonising the Economy
Subtopic:
Algae and aquatic biomass prodution systems
Event:
28th European Biomass Conference and Exhibition
Session:
1DV.1.4
Pages:
118 - 123
ISBN:
978-88-89407-20-2
Paper DOI:
10.5071/28thEUBCE2020-1DV.1.4
Price:
FREE
