Effect of Carbon/Nitrogen Ratio, Temperature, and Inoculum Source on Hydrogen Production from Dark Codigestion of Fruit Peels and Sewage Sludge

Lirio María Reyna-Gómez, Carlos Eduardo Molina-Guerrero, Juan Manuel Alfaro, Santiago Iván Suárez Vázquez, Armando Robledo-Olivo and Arquímedes Cruz-López
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Lirio María Reyna-Gómez: Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico
Carlos Eduardo Molina-Guerrero: Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Departamento de Ingeniería Ambiental, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico
Juan Manuel Alfaro: Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico
Santiago Iván Suárez Vázquez: Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Departamento de Ingeniería Ambiental, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico
Armando Robledo-Olivo: Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, Buena Vista, Saltillo 25315, Mexico
Arquímedes Cruz-López: Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Departamento de Ingeniería Ambiental, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico

Sustainability, 2019, vol. 11, issue 7, 1-13

Abstract: This paper studies the use of fruit peel biomass and waste sludge from municipal wastewater treatment plants in the metropolitan area of Monterrey, Mexico as an alternative way of generating renewable energy. Using a Plackett–Burman experimental design, we investigated the effects of temperature, inoculum source, and the C/N (Carbon/Nitrogen) ratio on dark fermentation (DF). The results indicate that it is possible to produce hydrogen using fruit peels codigested with sewage sludge. By adjusting the C/N ratio in response to the physicochemical characterization of the substrates, it was revealed that the quantities of carbohydrates and nitrogen were sufficient for the occurrence of the fermentation process with biogas production greater than 2221 ± 5.8 mL L −1 Reactor and hydrogen selectivity of 23% (366 ± 1 mL H 2 ·L −1 Reactor ) at the central point. The kinetic parameters (H max = 86.6 mL·L −1 , R m = 2.6 mL L −1 h −1 , and λ = 1.95 h) were calculated using the modified Gompertz model. The quantification of soluble metabolites, such as acetic acid (3600 mg L −1 ) and ethyl alcohol (3.4 ± 0.25% v / v ), confirmed the presence of acetogenesis in the generation of hydrogen.

Keywords: biohydrogen; chemical oxygen demand; sludge; volatile fatty acids; acetogenesis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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