Sustainable Microalgal Harvesting Process Applying Opuntia cochenillifera: Process Parameters Optimization

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Rodrigues, JRD (Autor) Outra; Santos, RD (Autor) Outra; Matos, RA (Autor) Outra; Pires, JCM (Autor) FEUP; Salgado, EM (Autor) Outra

Revista

Título: Applied Sciences

Vol. 13

Página Final: 1203

Editora: MDPI

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Projetos Associados

ALiCE - ALiCE - Laboratório Associado em Engenharia Química

LEPABE - Financiamento Plurianual 2020-2023 da Unidade de I&D LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

PhotoBioValue - Efeito da luz na configuração de fotobiorreatores para o cultivo de microalgas: aumento da eficiência fotossintética e valorização da biomassa

Outras Informações

ID Authenticus: P-00X-R97

DOI: 10.3390/app13021203

Abstract (EN): Microalgae harvesting by coagulation can use coagulant agents such as alum, synthetic polymers or biocoagulants. Biocoagulants have attracted the attention of researchers because they are natural, biodegradable, and promote high microalgal harvesting efficiencies. This study aims to optimize the harvesting of Chlorella vulgaris based on the dosage of the Opuntia cochenillifera extract and the choice of eluent for biopolymer extraction. The outdoor cultivation of C. vulgaris achieved a specific growth rate of 0.455 d(-1) and a maximum biomass concentration of 1.28 g(DW) L-1. In order to harvest the microalgal biomass, the polymer present in the mucilage of O. cochenillifera was extracted using NaOH and HCl. Coagulation and sedimentation assays were performed with different coagulant dosages: 3.5, 5.9, and 8.2 g L-1. The maximum harvesting efficiencies using the acid and alkaline extract coagulant solutions were 80.8% and 99.5%, respectively, with a dosage of 3.5 g L-1. According to the results, the C. vulgaris biomass can be harvested with the mucilage from O. cochenillifera in acid and alkaline eluents. The application of this biocoagulant constitutes a sustainable solution for microalgal harvesting.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12