Production of Ethanol From Two Varieties of Potato Peel Waste Through Cellulolytic and Amylolytic Enzymes

Chavez, Alisson Yépez; Morales, Rosa Basulto; González, Carlos Regalado; Viteri, Fausto

doi:10.1615/interjenercleanenv.2020032719

Cited by 9 publications

(3 citation statements)

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“…They will have to decide which fuels to provide, how much energy will be produced domestically and imported, and what kind of infrastructure will be used for energy production and distribution, among other strategic decisions. These decisions will be greatly influenced by various exogenous and endogenous variables, the cost, the accessibility of funds, and the inclinations for particular policies (such as those that address environmental consequences) (Chavez et al, 2020).…”

Section: Figurementioning

confidence: 99%

Promoting the use of bioenergy in developing nations: a CDM route to sustainable development

Dirisu,

Salawu,

Ekpe

et al. 2024

Front. Energy Res.

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The study focused on a forensic assessment of bioenergy utilization in developing countries, emphasizing how to improve bioenergy resources for a sustainable economy and development. First, a holistic review of energy sources and their impacts on sustainable development was highlighted. The study also looked at the relationships between various energy sources, both the supply and demand of energy, as the population statistics in developing countries. However, renewable energy is yet to be harnessed fully as it lagged by 0.7%. Shockingly, the African continent is backward in both the global energy supply and in tapping renewable energy sources, as only 6% is contributed. More so, applying a clean development mechanism (CDM) for energy utilization and control shows that net emission reduction and global temperature reduction of 1.5°C by 2030 is attainable. Thus, helping to realize low-cost and sustainable energy (SDG 7) and sustainable cities and communities (SDG11). Further, the assessment of the level of bioenergy availability and its utilization shows that 10% of the world’s energy is provided by bioenergy. Interestingly, it is available in every region in the form of biomass. The study is helpful for stakeholders, policymakers, and governments managing the affairs of the energy sector on the need to formulate policy that will guide effective bioenergy utilization and reduction in greenhouse gas emissions, especially in developing countries thereby, promoting sustainable economic growth.

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Section: Figurementioning

confidence: 99%

Promoting the use of bioenergy in developing nations: a CDM route to sustainable development

Dirisu,

Salawu,

Ekpe

et al. 2024

Front. Energy Res.

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“…[15], enzymatic hydrolysis has been proved to be preferable to acid hydrolysis, with significant concentrations of reducing sugars (69 g•L −1 ), by the use of potato peel waste as feedstock. Another research study showed that 11.9 g•L −1 of bioethanol was obtained from the enzymatic saccharification of potato peels using amylolytic and cellulolytic enzymes [16]. Some of the steps mentioned above have been applied simultaneously, leading to even higher ethanol yields (simultaneous saccharification fermentation, SSF).…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Bioethanol Production in a Potato Processing Industry

et al. 2023

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Nowadays, there is a requirement for industries to eliminate carbon from their energy mix and substitute it with greener options. This calls for investment in efforts to facilitate the scaling up of technical advancements. Because of the huge amount of waste, a life cycle strategy has been used by industries, especially the food industry, to lessen the environmental impact of their products. One of the sectors that burdens the environment with a significant amount of waste is the potato processing industrial sector. The current study focuses on the valorisation of all the potato processing waste streams (potato peels, potato tubers and slices, starch and low-quality chips) towards bioethanol production at a pilot level. After their physico-chemical characterisations, several experimental trials were performed in order to determine the optimum pretreatment and hydrolysis conditions for each waste stream. Acid hydrolysis, alkaline hydrolysis and hydrothermal pretreatment were examined when no pretreatment resulted in low ethanol yields (below 60%). The optimum results that were obtained were applied in a pilot plant of 200L to examine the upscaling factor. It was verified that upscaling by 1000 times generates comparable and, in some cases, greater results. From the integration of the results and the mass balances of a typical potato processing company, a full-scale implementation plan was also set up, where it was calculated that around 2 m3 bioethanol per week could be produced.

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“…Enzyme-mediated hydrolysis also offers other advantages, such as lower energy consumption, mild conditions, and no corrosion. However, the use of a suitable combination of multiple enzyme systems with high specificity and costeffectiveness remains a challenge for commercial applications [8,[24][25][26]. Since potato peels contain cellulose, hemicelluloses, starch, and pectin, an enzyme cocktail consisting of carbohydrases, including endo-1,4-β-D-glucanase, exo-1,4-β-D-glucanase, β-1,4-glucosidase, endo-β-1,4-xylanase, endo-β-1,4-β-D-mannanase, α-amylase, gluco amylase, and pectinase, can be utilized to saccharify the biomass into free sugars.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Potential of Potato Peels for Bioethanol Production through Various Pretreatment Strategies and an In-House-Produced Multi-Enzyme System

Soni

Sharma

et al. 2023

Sustainability

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This study aimed to explore the viability of converting potato peel waste into bioethanol using a custom-produced multi-enzyme preparation. Various pretreatment approaches were employed on the potato peels, including thermal, chemical, and thermo-chemical methods. These methods involved boiling for 30 and 60 min, steaming at different pressures and durations, and applying different concentrations of chemicals, including H2SO4, HNO3, CH3COOH, HCl, NaOH, Ca(OH)2, KOH, NH3, and H2O2, either individually or in combination with steam treatment. The pretreated potato peels were subsequently subjected to enzymatic hydrolysis using a crude multi-enzyme cocktail obtained from solid-state fermentation of wheat bran by a naturally occurring strain of Aspergillus niger P-19. This enzyme cocktail consisted of cellulases, hemicellulases, pectinase, and amylases. The most effective pretreatment combination involved the use of 3% H2SO4 followed by steam treatment under pressure, and enzymatic hydrolysis utilizing the crude multi-enzyme preparation. This combination resulted in the highest concentration of reducing sugars (141.04 ± 12.31 g/L), with a carbohydrate conversion rate of 98.49% when a substrate loading of 20% was used. As a result, an ethanol yield of 43.2 ± 3.82 g/L, representing 21.6% based on dry matter, was achieved. Furthermore, supplementing the medium with peptone, (NH4)(H2PO4), and ZnSO4 at a concentration of 0.1% w/v each, along with solid loadings of 22% and 24%, respectively, achieved yield improvements of 51.67 g/L and 54.75 g/L. However, the maximum productivity of 23.4% was observed with a 22% loading, compared to a yield of 22.8% with a 24% solid loading, based on dry matter.

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Production of Ethanol From Two Varieties of Potato Peel Waste Through Cellulolytic and Amylolytic Enzymes

Cited by 9 publications

References 0 publications

Promoting the use of bioenergy in developing nations: a CDM route to sustainable development

Promoting the use of bioenergy in developing nations: a CDM route to sustainable development

Optimisation of Bioethanol Production in a Potato Processing Industry

Exploring the Potential of Potato Peels for Bioethanol Production through Various Pretreatment Strategies and an In-House-Produced Multi-Enzyme System

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