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Questions and Answers
What was the reducing sugar concentration after fermentation in the study?
What was the calculated ethanol yield percentage reported in the study?
Which enzyme combination was used to enhance the release of reducing sugars?
What by-product is mentioned as an alternative feedstock for ethanol production?
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What is one benefit of producing ethanol from potato peel waste?
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What was the amount of sugars consumed during the fermentation process?
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What approach will be further investigated for the feasibility of ethanol production from PPW?
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What concentration of Celluclast was used in the studied fermentation process?
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What is the maximum product yield achieved in bioethanol production from agri-food wastes?
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Which factor is NOT critical for the production of ethanol from potato peel waste (PPW)?
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How does enzymatic hydrolysis of potato peel waste compare to hydrochloric acidic hydrolysis?
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What microorganism is used for the fermentation process in bioethanol production discussed?
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What is the role of the enzyme combination in the hydrolysis process for bioethanol production?
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Which method is used for determining the amount of reducing sugar during the bioethanol production process?
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What is the main advantage of using enzymatic hydrolysis over hydrochloric acid hydrolysis in the context of bioethanol production?
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What was a significant finding regarding global bioethanol production as mentioned in the content?
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What was the quantity of reducing sugar released during enzymatic hydrolysis?
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What is the required percentage of bio-ethanol blending with traditional gasoline as stipulated by Federal Government regulations under the Kyoto agreement?
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In 2008, what was the estimated annual bio-ethanol production in the EU?
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Which by-product from the potato industry shows high potential for ethanol production?
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What defines fuel ethanol production in many European countries according to recent recommendations?
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What percentage of global ethanol production is attributed to fuel ethanol?
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Which crops are primarily utilized for fuel ethanol production in tropical countries?
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What is the projected bio-ethanol utilization target for EU member states in 2010 and beyond?
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Study Notes
Ethanol Production from Potato Peel Waste (PPW)
- PPW is a significant waste issue for potato industries in Europe.
- Bio-ethanol production from PPW has potential as a large market.
- Federal government regulations regarding bio-ethanol blending with gasoline may create demand.
- PPW contains starch, cellulose, hemicellulose, and fermentable sugars, making it suitable for ethanol production.
- Enzymatic hydrolysis using three enzymes released 18.5 g/L reducing sugar and 7.6 g/L ethanol.
- PPW has high potential for ethanol production.
Introduction
- Global interest in alternative energy sources is increasing due to energy supply depletion.
- Bio-ethanol is a promising biofuel from renewable resources.
- Many European countries recommend the use of bio-ethanol as fuel or additive to gasoline.
- Mandatory blending of bio-ethanol with gasoline may increase demand for it.
- Many countries are implementing programs to increase ethanol addition to gasoline.
- Ethyl alcohol global production reached 51,000 million liters, with the USA and Brazil as the main producers. Fuel ethanol accounts for 73% of global production.
Materials and Methods
- PPW samples were collected, dried, and moisture content was determined.
- Total sugars, carbohydrates, protein, and fats were analyzed using standard methods.
- Potato peel waste (PPW) was hydrolyzed with different enzyme combinations.
- Hydrolysis was followed by fermentation using Saccharomyces cerevisae var. bayanus
- Different enzyme combinations and their impacts on ethanol production were evaluated.
Results and Discussion
- PPW chemical composition was analyzed (high starch content but low fermentable reducing sugar).
- Enzymatic hydrolysis using different enzyme combinations increased the fermentable reducing sugar content.
- The most effective enzyme combination led to the highest production of ethanol, with a yield of 92.5% the maximum theoretical yield.
- Using specified enzyme combinations yielded 6-7.6 g/L of ethanol.
- This method is efficient and economically feasible, offering an alternative solution for PPW management, and also reduces waste by-products.
Ethanol Production from PPW Fermentation
- Fermentation of the raw material is not practical, an initial hydrolysis (acidic or enzymatic) of carbohydrates is necessary.
- Use of Ternamyl 120 released 4.65 g/L, Liquozyme released 4.03 g/L, and Viscozyme released 0.7 g/L.
- Combination of enzymes was necessary for effective hydrolysis of PPW.
- Higher enzyme concentrations yielded higher fermentable reducing sugar.
- Maximum ethanol production after 48 hours leveled off.
- Theoretical conversion efficiency for this process was 92.6%.
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Description
Explore the process of bio-ethanol production from potato peel waste (PPW). This quiz delves into the potential of PPW as a renewable resource for biofuel, highlighting the enzymatic hydrolysis process and the growing demand for bio-ethanol in the energy sector.
