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Advisor(s)
Abstract(s)
The olive mill wastewater (OMW) is the principal industry residue extraction of
olive oil. Generally is characterized by very high organic load, due to high levels of
phenolic compounds and sugars, and have minimum levels of nitrogen compounds and low pH. A variety of biological processes and microorganisms have been tested to treat OMW, including bacteria, yeasts and fungi, where the effectiveness in reducing the toxicity varies greatly.
Taking this into account, the aim of this work is to assess the potential of microalgae in
the decrease of phenolic compounds in OMW. For this purpose, the effect of
immobilized Chlorella vulgaris in OMW biotreatments has been tested in batch
cultures. The effectiveness of the process has also been assessed by phytotoxicity, in
germination trials of Lactuca sativa. Biotreatments have been performed with OMW
dilutions of 35%, 50% and 60%. Results showed that C. vulgaris has the ability to
remove phenolic compounds, achieving a final Phenolic Loss Index (PLI) of 73%.
Regarding the phytotoxicity after biotreatment we can conclude that microalgae can
reduce the toxicity of olive mill wastewaters also having the ability to degrade the
phenolic compounds that inhibit the germination and growth of Lactuca sativa.
Furthermore, the algae biomass obtained in this process could be valorized in other
applications.
Description
Keywords
Olive mill wastewaters Bioremediation, Chlorella vulgaris Phenolic compounds Phytotoxicity Lactuca sativa
Citation
Martins, Bruna; Monteiro, Diana; Fernandes, Conceição (2015). Preliminary results of olive mil wastewater treatment by immobilized microalgae. Aperito Journal of Cellular and Molecular Biology. ISSN 2470-1114. 1:1 (105), p. 1-7
Publisher
Aperito Journal of Cellular and Molecular Biology