Energy and budget balances for sweet potato-based ethanol production

Abstract

How to cite SILVA, L.F.L. e; GOnçALVES, W.M.; MALUF, W.R.; RESEnDE, L.V.; LASMAR, A.; CARVALHO, R. de C.; LICURSI, V.; MOREttO, P. Energy and budget balances for sweet potato-based ethanol production.Abstract -The objective of this work was to assess the viability of sweet potato (Ipomoea batatas) for ethanol production, as well as to estimate the energy and budget balances for the crop. Data from the agricultural and industrial production phases were evaluated. Those from the agricultural phase were estimated from a field experiment and used for comparison of sweet potato genotypes. Those from the industrial phase were estimated based on the literature on the fossil fuel energy and electricity consumed in the ethanol production process. With average yields of 35 Mg ha -1 roots and 12 Mg ha -1 dry stems, the output/input ratios were 6.64 and 1.93 for the energy and budget balances, respectively. For yields of 50 and 80 Mg ha -1 roots (17 and 27 Mg ha -1 dry stems, respectively), the indexes for energy balance were 7.16 and 7.68, respectively, and those for energy budget were 2.76 and 4.42. The obtained results confirm the great aptitude of the sweet potato crop for biofuel production.

Amylase potential of filamentous fungi isolated from sweet potato pulp

“…Presenting a yield over 50 Mg ha -1 tuberous roots, sweet potatoes show an energy balance similar to that of the sugar cane and higher than that of maize (Silva et al, 2019). Its starch content yield per area unit is higher than that of maize (Duvernay et al, 2013).…”

Potential use of sweet potato leaves for human consumption

“…In the Brazilian territory, the crop is widespread and cultivated mostly in small farms (Maia & Oliveira, 2022), which is attributed to the plant's endurance, good nutritional content, low production costs, wide adaptation to soil and climate, and drought tolerance (Pedrosa et al, 2015). Moreover, due to its high genetic diversity, the species has a broad range of uses (Silva et al, 2022), being a promising alternative raw material for biofuel production (Torquato-Tavares et al, 2017;Silva et al, 2019) and for food, paper, and cosmetic industries, as well as for human nutrition and animal feeding (Donato et al, 2020).…”

Physiological performance, bromatological quality, and productivity of sweet potato using calcium oxide particle film

“…Sweet potato [Ipomoea batatas (L.) Lam.] is an essential tuberous root, which has multiple uses, such as animal feed, ethanol production, and, especially in developing countries, human food (Drapal et al, 2019;Silva et al, 2019a). However, the most common use is for tuber production, and the aerial part (branches and leaves) is discarded or destined to feed cattle (Backer et al, 1980;Akoetey et al, 2017).…”