Potential for biogas generation from sweet potato genotypes

Abstract

Biogas is a technology that enables the generation of energy through the process of anaerobic biodigestion, and sweet potato is an option as an energy production source. This research evaluated biogas production in anaerobic biodigesters and characterized the physico-chemical composition of two commercial sweet potato cultivars, BRS Cuia and BRS Rubissol, and two genotypes, Bela Vista and Laranjeiras. Variance analysis, the Tukey test and the physical-chemical characterization were completed, and the results were correlated using principal component analysis (PCA). In the analyses of tuberous root composition, significant differences between the genotypes were observed because of the influence of the absorption of moisture, decomposition, and variations in the yield and quality of roots. For the biochemical methane potential (BMP) test, the estimate of biogas production was 2,906.5 liters ha-1 for the cultivar BRS Cuia, 2,712.4 liters ha-1 for Laranjeiras, 2,906.5 liters ha-1 for BRS Rubissol, and 398,2 liters ha-1 for Bela Vista. The PCA analysis of sweet potato genotypes, physical-chemical and agronomic parameters showed all genotypes have a direct correlation with the amount of reducing sugars and humidity, with 97.77% of the data variability explained. The Laranjeiras genotype has the most significant potential to produce biogas, followed by the BRS Cuia cultivar. The results emphasize that the sweet potato crop is a good source of biomass for energy generation.

El compostaje de cáscara de Musa paradisiaca L. para la producción de biogás y biometano como estrategia de preservación de la salud ambiental

“…Para ello es importante considerar una materia prima que contenga una mayor proporción de agua (Lorenzo et al, 2005). También se han desarrollado diversos estudios que buscan el aprovechamiento del lodo residual formado (Longaretti et al, 2919) usando materias primas como cáscara de plátano (Guevara et al, 2016), cáscara de arroz (Sawazaki et al, 1985), vinaza (Ariza et al, 2019, residuos de ocra (Ugwu & Enweremadu, 2019), desechos de papa (Batista et al, 2019), excremento de animales (Guerrero et al, 2019) excremento humano (Linares et al, 2017), residuos de alimentos (Burhan et al, 2020), y desechos agrícolas industriales (Campos et al, 2018).…”

Effect of Fertilization with the Sheep Manure Vermicompost on the Yield of Selected Plants and Selected Properties of Soil Developed from Loess

“…Currently, the sweet potato is recognized as a very good raw material for the production of functional food, which, in addition to the nutritional function, has an additional positive effect on the human health (antioxidant, anti-inflammatory, hepatoprotective, anti-cancer and anti-diabetic properties) [An 2004; Krochmal-Marczak and Sawicka 2018]. I. batatas is a plant with a huge capacity for absorbing the solar energy and converting it into biological mass; hence, the sweet potato tubers can also be used for the production of ethanol or biogas, and the fresh mass of the above-ground parts (stems and leaves) -for the biogas production, both after wilting and after ensiling [Batista et al 2019].…”