Removal of Nutrients and Pesticides from Agricultural Runoff Using Microalgae and Cyanobacteria

The use of pesticides in agriculture has ensured the production of different crops. However, pesticides have become an emerging public health problem for Latin American countries due to their excessive use, inadequate application, toxic characteristics, and minimal residue control. The current proje...

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Autores:: Castellanos Estupiñan, Miguel A.
Carrillo Botello, Astrid M.
Rozo Granados, Linell S.
Becerra Moreno, Dorance
García-Martinez, Janet
Urbina-Suarez, Nestor Andres
López Barrera, German Luciano
Barajas Solano, andres F
ZUORRO, Antonio
Samantha J., Bryan

Tipo de recurso:: Article of journal

Fecha de publicación:: 2022

Institución:: Universidad Francisco de Paula Santander

Repositorio:: Repositorio Digital UFPS

Idioma:: eng

Description
Summary:	The use of pesticides in agriculture has ensured the production of different crops. However, pesticides have become an emerging public health problem for Latin American countries due to their excessive use, inadequate application, toxic characteristics, and minimal residue control. The current project evaluates the ability of two strains of algae (Chlorella and Scenedesmus sp.) and one cyanobacteria (Hapalosyphon sp.) to remove excess pesticides and other nutrients present in runoff water from rice production. Different concentrations of wastewater and carbon sources (Na2CO3 and NaHCO3 ) were evaluated. According to the results, all three strains can be grown in wastewater without dilution (100%), with a biomass concentration comparable to a synthetic medium. All three strains significantly reduced the concentration of NO3 and PO4 (95 and 85%, respectively), with no difference between Na2CO3 or NaHCO3 . Finally, Chlorella sp. obtained the highest removal efficiency of the pesticide (Chlorpyrifos), followed by Scenedesmus and Hapalosyphon sp. (100, 75, and 50%, respectively). This work shows that it is possible to use this type of waste as an alternative source of nutrients to obtain biomass and metabolites of interest, such as lipids and carbohydrates, to produce biofuels.

Removal of Nutrients and Pesticides from Agricultural Runoff Using Microalgae and Cyanobacteria

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