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Harvesting microalgae using ozone-air flotation for recovery of biomass, lipids, carbohydrates, and proteins.
Valeriano González, María Teresa; Orta Ledesma, María Teresa; Velasquez-Orta, Sharon Belinda; Monje Ramírez, Ignacio.
Afiliación
  • Valeriano González MT; Instituto de Ingeniería, Coordinación de Ingeniería Ambiental, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico.
  • Orta Ledesma MT; Instituto de Ingeniería, Coordinación de Ingeniería Ambiental, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico.
  • Velasquez-Orta SB; School of Engineering, Newcastle University, Newcastle upon Tyne, UK.
  • Monje Ramírez I; Instituto de Ingeniería, Coordinación de Ingeniería Ambiental, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico.
Environ Technol ; 42(21): 3267-3277, 2021 Sep.
Article en En | MEDLINE | ID: mdl-32109198
The objective of this research was to study a novel ozone-air flotation microalgae harvesting method and evaluate its effect on the recovery of biomass and biocomponents (lipids, carbohydrates, proteins). Best processing conditions were established using a response surface methodology (RSM). Microalgae separation and biocomponent recovery were evaluated according to changes in gas concentration (13, 18 and 25 mgO3/L), ozone dose (0.04, 0.09 and 0.16 mg O3/mg biomass) and airflow rate (0.5, 1.0 and 1.5 L/min). More than 95% of the biomass was recovered from wastewater at an ozone-air combination of 0.09 mgO3/mg biomass and 1.5 L air/min. Using ozone-air represented a reduction of 59% in the ozone dose compared to the flotation process solely using ozone (0.22 mgO3/mg biomass). In addition, there was an improved yield in the recovery of all microalgae biocomponents. A maximum yield of 0.18 mg lipids/mg biomass was achieved at: 0.16 mg O3/mg biomass, 25 mg gas O3/L and 1.5 L air/min. In conclusion, combining the use of ozone-air for separation of microalgae reduces ozone requirement and enhances lipids and proteins post-extraction.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Microalgas Idioma: En Revista: Environ Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: México Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Microalgas Idioma: En Revista: Environ Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: México Pais de publicación: Reino Unido