Utilization of Banana Stem Juice as a Feedstock Material for Bioethanol Production

Abstract

Bananas are widely cultivated in tropical and subtropical countries and about 220 tons of biomass waste is produced per hectare of banana plantation. Banana pseudostem contains nearly 90% of moisture and about 4-5 m 3 sap is generated from one ton of dried stem with high chemical oxygen demand(COD) and biological oxygen demand (BOD). The feasibility of using banana sap as a feedstock to produce ethanol is evaluated in this study. Banana sap is obtained by crushing the pseudostems and concentrated ten times and supplementing with other industrial byproducts such as corn steep liquor(CSL), spent wash (SW), and yeast extract (YE) for ethanol production. Acid and alkali hydrolyzes are performed to enhance the sugar levels of the sap before fermentation. Two different strains of Saccharomyces cerevisiae (MTCC170 and MTCC180) are used for fermentation. In general, supplementation of banana sap with industrial byproducts significantly enhanced the ethanol production. The maximum ethanol production (2.5 g −1 ) is observed with concentrated banana sap supplemented with 25% SW (v/v) with MTCC170, which is 16-fold higher than banana sap alone. Theethanol content is also higher in alkali-hydrolyzed banana sap supplemented with 25% SW compared to control. These results suggest that banana sap can be used as a renewable source to produce ethanol by supplementing with other industrial byproducts.

Value‐Added Products from Fruit and Vegetable Wastes: A Review

“…[ 53,232 ] Gupta et al. [ 246 ] and Razaghi et al. [ 243 ] used HCl instead of H 2 SO 4 to prevent the formation of furfural and hydroxymethylfurfural.…”

“…[ 232,249–251 ] However, Gupta et al. [ 246 ] carried out acid and basic hydrolysis of banana residues in parallel to check the effectiveness of these treatments in terms of fermentable sugars. The results showed that acid hydrolysis is more effective for sugar extraction when comparing the two methods, obtaining more than 8 g L −1 of sugar content from acid pre‐treatment and ≈7 g L −1 of sugar content from alkali hydrolysis.…”

“…Several authors have modified or incorporated fermentation variables to achieve optimal conditions and thus obtain better results in terms of quality and quantity. For instance, Gupta et al., [ 246 ] to optimize the time period for maximum fermentation of banana waste for the production of bioethanol, added 0.3% yeast extract to the banana residue. Tan et al.…”

Unveiling the multifaceted incorporation of Musa acuminata peduncle juice as a bio-corrosion inhibitor of mild steel in seawater-simulated solution

“…This Musa acuminata peduncle juice extract can be used to solve the mild steel corrosion problem in seawater and the associated issues in several scenarios. Additionally, it is worth mentioning that Musa acuminata peduncle juice has high amounts of several bioactive substances, 14 helps make biodiesel, 15 and has healing properties, 16 to name a few. However, there is little or no information on the inhibition properties and potential of M. acuminata peduncle juice on mild steel.…”

In vitro evaluation of bioactive properties of banana sap

“…After harvesting the bananas, the plant dies. The dead plants comprising of leaves, pseudo-stems contribute to huge agro-waste from the banana farms into the environment (Gupta et al 2019 ). Moreover, the pseudo-stem of banana is finding application in the paper manufacturing industry along with a wide range of value-added products such as ropes, mats etc.…”