Nejayote and Food Waste Leachate as a Medium for Scenedesmus acutus and Haematococcus pluvialis Production: A Mixture Experimental Design

Author:

Garza-Valverde Elizabeth1,García-Gómez Celestino1ORCID,Nápoles-Armenta Juan1ORCID,Samaniego-Moreno Luis2,Martínez-Orozco Edgardo3ORCID,De La Mora-Orozco Celia4ORCID

Affiliation:

1. Faculty of Agronomy, Autonomous University of Nuevo León, Francisco I. Madero S/N, Ex Hacienda el Canada, General Escobedo C.P. 66050, Nuevo León, Mexico

2. Department of Irrigation and Drainage, Engineering Division, Antonio Narro Autonomous Agrarian University, Calzada Antonio Narro #1923 Buenavista, Saltillo C.P. 25315, Coahuila, Mexico

3. Academic Unit Arandas, Technological Institute José Mario Molina Pasquel y Henríquez, National Technological of México, Arandas C.P. 47180, Jalisco, Mexico

4. Departament of Integral Watershed Management, National Institute of Forestry, Agricultural and Livestock Research, Tepatitlán de Morelos C.P. 47600, Jalisco, Mexico

Abstract

The wastewaters of nejayote and food waste leachate are polluting effluents with a high load of organic matter that cause great problems when discharged to water receptors. In this work, we investigated the treatment of nejayote wastewaters and food waste leachate for the production of microalgae Scenedesmus acutus and Haematococcus pluvialis. For Scenedesmus acutus, treatment with 10% food waste leachate and 90% growth medium resulted in a concentration of 5.34 g/L in 20 days (μmax = 0.16/day). Meanwhile, 10% nejayote and 90% medium growth produced 4.45 g/L at 20 days (μmax = 0.13/d). A significant reduction of up to 82.6% ammonium, 84.1% orthophosphate, and 87.25% COD was also observed between the different treatments. For Haematococcus pluvialis, the treatment of 90% food waste leachate and 10% growth medium produced a concentration of 4.73 g/L at 6 days (μmax = 0.71/day), while the mixture of 25% najayote, 25% food waste leachate, and 50% growth medium produced a concentration of 5.5 g/L at 20 days (μmax = 0.25/dat). A reduction of up to 97.8% ammonia, 97.4% orthophosphate, and 73.19% COD was also recorded. These findings demonstrated the potential to cultivate microalgae and extract biomolecules for commercial purposes.

Publisher

MDPI AG

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