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Publicação
Bioprocess to produce biostimulants/biofertilizers based on microalgae grown using piggery wastewater as nutrient source
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Autores
Ferreira, Alice
Corrêa, D. O.
Ribeiro, Belina
Silva, Teresa Lopes da
Gouveia, Luisa
Orientador(es)
Resumo(s)
ABSTRACT: In the present work, two downstream processes - high-pressure homogenization at 100 (HPH-100) and 1200 bar (HPH-1200), and enzymatic hydrolysis (EH) - were tested to produce biostimulant extracts from Tetradesmus obliquus grown in piggery wastewater at two concentrations (12.8 and 88.3 g/L). Extracts before and after centrifugation (C) were evaluated in four bioassays using garden cress (germination), mung bean (auxin-like activity), and cucumber (auxin- and cytokinin-like activity) relative to distilled water. The initial microalgal culture, without any treatment, had the best germination results (162 % at 0.2 g/L) and the only one that showed cytokinin-like activity (141 % at 0.5 g/L). In both auxin-like bioassays, the HPH-1200 + C and EH + C originated high values (186 and 155 % for cucumber, 290 and 285 % for mung bean, respectively). For mung bean, the HPH-1200 achieved the highest auxin-like effect (378 %). Finally, the extracted biomass contained essential nutrients for biofertilization, complementing the biostimulant extracts for sustainable agriculture application.
Descrição
Palavras-chave
Microalgae Tetradesmus obliquus Piggery effluent Wastewater treatment Biostimulant Biofertilizers Enzymatic hydrolysis
Contexto Educativo
Citação
Ferreira, A., Corrêa, D.O., Ribeiro, B., Silva, T. L., Santos, C.M., Acién, F.G. & Gouveia, L. (2024) Bioprocess to produce biostimulants/biofertilizers based on microalgae grown using piggery wastewater as nutrient source. In: Bioresource Technology, 2024, vol. 414, article nº 131619. https://doi.org/10.1016/j.biortech.2024.131619
Editora
Elsevier