trategy for the cultivation of Chlorella vulgaris with high biomass production and biofuel potential in wastewater from the oil industr

Author(s)

Silva, Danilo Alves ^[1] ; Cardoso, Lucas Guimaraes ^[2] ; de Jesus Silva, Jamilla Sueira ^[1] ; de Souza, Carolina Oliveira ^[1] ; Franca Lemos, Paulo Vitor ^[3] ; de Almeida, Paulo Fernando ^{[3, 4]} ; Ferreira, Ederlan de Souza ^[1] ; Lombardi, Ana Teresa ^[2] ; Druzian, Janice Izabel ^{[1, 3]}

Affiliation

^[1] Univ Fed Bahia, Fac Pharm, Grad Program Food Sci, Salvador, BA - Brazil

^[2] Univ Fed Sao Carlos, Dept Bot, Lab Algae Biotechnol, Sao Paulo - Brazil

^[3] Univ Fed Bahia, Inst Hlth Sci, Northeast Biotechnol Network, Salvador, BA - Brazil

^[4] Univ Fed Bahia, Inst Hlth Sci, Lab Microbiol & Bioproc Moacyr Durham Moura Costa, Salvador, BA - Brazil

• Document type: Journal article
• Source: ENVIRONMENTAL TECHNOLOGY & INNOVATION; v. 25, FEB 2022.
• Web of Science Citations: 0

Abstract

This work aimed to provide a biochemical characterisation of Chlorella vulgaris biomass cultivated with daily supplementation of produced water. The simultaneous phytoremediation and production of biomolecules and bioproducts of commercial interest were analysed and discussed. Cultures were grown in laboratory scale photobioreactors for 26 days in 1.5 L of BG11 medium, with daily supplementation of 50 mL of non-autoclaved produced water (T-PW) or distilled water (T-DW). Biomass production differed among the control (3.86 g L-1), Tp w (1.69 g L-1), and lb w (1.82 g L-1). The Tp w -treated culture showed a high concentration of carbohydrates (40.19 %) with a bioethanol production of 18.22 mL 100 g(-1) of biomass. The content of carotenoids (2.4 mu g mL(-1)), protein (22.83 %), and lipids (21.53 %) were also determined. The lipid composition consisted mostly of palmitoleic (5.42 mg g(-1)), gamma-linolenic (3.02 mg g(-1), and linolelaidic (1.94 mg g(-1)) acids, which gave the oil the ideal properties for quality biodiesel. In addition, the high phytoremediation efficiency of heavy metals such as copper (70.00 %), manganese (76.89 %), and molybdenum (97.82 %), as well as total petroleum hydrocarbons (48.59 %), were also detected. Therefore, T-PW can be a promising alternative for phytoremediation of chemical compounds, while utilising effluent from the oil industry to produce a high content of valuable biomass, biomolecules, and biofuels. (C) 2021 The Author(s). Published by Elsevier B.V. (AU)

• FAPESP's process: 19/26571-0 - Microalgae in renewable energy: biodiesel and bioplastic production in oil extraction water bioremediation
• Grantee: Ana Teresa Lombardi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 20/15688-1 - Defining the best cultivation systems for scaling up different microalgae species (species selected in the previous stages of the thematic project)
• Grantee: Lucas Guimarães Cardoso
• Support Opportunities: Scholarships in Brazil - Post-Doctoral