Title:
Potential of Chlorella Pyrenoidosa Biomass Production based on Olive Mill Wastewater as a New Bioprocess for Biofuel Production, and Carbon Dioxide Biofixation
Author(s):
Maaitah, M., Hodaifa, G., Sánchez, S.
Document(s):
Paper
Poster
Abstract:
Olive oil industry is one of the most important industries of the Mediterranean Basin. This industry faces many environmental challenges, especially the huge amounts of olive mill wastewater (OMW) production with high organic and inorganic load. In this work, the response of the microalgae Chlorella pyrenoidosa to growth using the available nutrients in olive oil washing wastewater (OOWW) has been studied. In this sense, different CO2 concentrations in the air supplied to the culture media in the range of 0.035% to 15% (v/v) have been analysed. The common operating conditions used were temperature 25 °C, pH 8.0, air flow 1 v/v/min, and initial illumination intensity of 126.2 µE m-2 s-1, under 12 h light/12 h dark cycle. The CO2 effect on microalgal kinetic growth and biochemical composition has been determined. The experimental results showed that concentration of 30% (v/v) of OOWW, and a concentration of 10% CO2 registered high values for the maximum specific growth rate, µm (0.033 h-1) and volumetric biomass productivity, Pb (5.7 10-3 g dm-3 h-1). At the same time, higher values for productivities in total chlorophyll (1.73%), carotenoids (0.39 %), crude protein (43.9 %), and total lipids (48.7%) have been obtained. The determination of fatty acid profiles indicted lipid fraction suitable for biofuel production. Regarding treated OOWW, high removal percentages for chemical oxygen demand (88.9%), total phenolic compounds (95.3%), total nitrogen (96.2%) and total phosphorus (92.2%) were achieved. The final quality parameters of treated OOWW indicated that it is able to be used in irrigation of olive grove or in the extraction process itself.
Keywords:
biofuel, olive-mill wastewater, Chlorella pyrenoidosa, bioprocess, nutrients removal
Topic:
Sustainable Resources for Decarbonising the Economy
Subtopic:
Algae and aquatic biomass production systems
Event:
32nd European Biomass Conference and Exhibition
Session:
1BV.3.23
Pages:
76 - 81
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-1BV.3.23
Price:
FREE
