Statistical study of the growth kinetics and lipid content of microalgae cultivated in brackish media, using wastewater as a source of nutrients for bioenergetic purposes




Reuse; Brackish Water; Biotechnology; Biofuels; Biomass; Lipids.


The present work aimed to prove, statistically, the influence of the concentration of nutrients from fossil waters on the growth kinetics and intracellular lipid accumulation in microalgae. The species Chlorella sp., Scenedesmus acuminatus, Nannochloropsis sp., Monoraphidium contortum and Pediastrum tetras were studied, which were isolated from the semiarid region of the Brazilian northeast and cultivated in a mixture composed of brackish groundwater and effluent from septic tanks. From the crops, the kinetic parameters, dry biomass production and lipid content were analyzed, using the experimental planning for one factor as a tool, with the concentration of nutrients as an independent variable. The maximum growth velocity (μmax), generation time (tg), as well as the lipid content were the studied response variables. The results showed that the species with the greatest accumulation of lipids were Chlorella sp., with a lipid content of 81.20%, and Nannochloropsis sp. with 73.68%, being the most promising for bioenergetic purposes. Therefore, the concentration of nutrients from fossil effluents combined with the salinity of the medium acted directly on cell growth and lipid content, and such factors can be used as an artifice to enhance lipid production, aiming at the production of biofuels.

Author Biographies

Bruna da Silveira Guimarães, Universidade Federal de Campina Grande

Graduada em Engenharia Química pela Universidade Federal de Campina Grande, Paraíba, Brasil no ano de 2011, onde desde então vem atuando em projetos de pesquisa e extensão no Laboratório de Referência em Dessalinização (LABDES/UFCG). Possui mestrado em Engenharia Química pela UFCG, concluído no ano de 2016, na área de meio ambiente e biocombustíveis. Doutorado em Engenharia Química, concluído no ano de 2020, pela UFCG, na área de meio ambiente, produção de microalgas e biocombustíveis.

Kepler Borges França, Universidade Federal de Campina Grande

Engenheiro Químico pela Universidade Federal da Paraíba, concluiu seu doutorado na University of Kent at Canterbury na Inglaterra. Atualmente, é Professor Titular e pesquisador do Departamento de Engenharia Química na Universidade Federal de Campina Grande. Possui experiência na área da Engenharia Química, com ênfase em processos de membranas voltados para tratamentos de águas para consumo humano. Possui experiência em projetos com membranas de microfiltração, ultrafiltração, nanofiltração e osmose inversa para fins de purificação e dessalinização de águas.

João Alexandre Rodrigues Nascimento, Universidade Federal de Campina Grande

Graduando em Engenharia Química, na Universidade Federal de Campina Grande. Atua em pesquisa na área de produção de biomassa de microalgas para fins bioenergéticos.


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How to Cite

GUIMARÃES, B. da S. .; FRANÇA, K. B. .; NASCIMENTO, J. A. R. .; DANTAS, C. P. . Statistical study of the growth kinetics and lipid content of microalgae cultivated in brackish media, using wastewater as a source of nutrients for bioenergetic purposes. Research, Society and Development, [S. l.], v. 11, n. 10, p. e16111032246, 2022. DOI: 10.33448/rsd-v11i10.32246. Disponível em: Acesso em: 1 dec. 2023.