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Corn steep liquor powder can serve as an inexpensive source of fuel ethanol culture medium
Release time:
2024-09-20
Corn steep liquor powder is a major byproduct of corn wet milling industry, containing protein, amino acids, vitamins, minerals, and other growth factors (purines and pyrimidines, etc.). It is inexpensive and nutritious, and is widely used as a low-cost substitute for complex nutrient sources such as yeast extract, peptone, vitamins, amino acids, and other nutrients in the fermentation industry.
With the decreasing use of non renewable fuels such as fossils, the demand for developing and utilizing carbon neutral renewable resources to produce fuels is increasing; The large-scale synthesis of fuel ethanol through biomass fermentation is an economical and sustainable method; In order to expand the industrial preparation of fuel ethanol and maintain economic feasibility, there is a need for cheap and stable sources of culture medium raw materials,
1: Corn steep liquor powder can serve as an inexpensive source of fuel ethanol culture medium
Corn steep liquor powder is a major byproduct of corn wet milling industry, containing protein, amino acids, vitamins, minerals, and other growth factors (purines and pyrimidines, etc.). It is inexpensive and nutritious, and is widely used as a low-cost substitute for complex nutrient sources such as yeast extract, peptone, vitamins, amino acids, and other nutrients in the fermentation industry.
Adding Corn steep powder in the ethanol production process can optimize other additional nutrients such as vitamins, as they already contain sufficient amounts in Corn steep powder. Therefore, Corn steep powder can serve as a low-cost alternative to the nutrients required for ethanol production.
Experimental results have shown that when yeast extract and vitamins are replaced by 1% corn steep solids solution, the growth of microorganisms and ethanol production are not affected. This indicates that using corn steep solids instead of yeast extract as a fermentation nitrogen source is feasible for reducing the cost input of large-scale ethanol production.
CSL powder can replace yeast extract, vitamins, and minerals. Optimized CSL powder medium produces 120mm ethanol. Corn steep powder can serve as an inexpensive source of most of the nutrients required for ethanol production fermentation, thereby improving the economic viability of ethanol production
2: The Promoting Effect of Corn steep powder on Ethanol Production
The rich nutritional components of Corn steep liquor powder can promote microbial growth, enhance fermentation activity, and promote ethanol production. According to reports, the cellular proteins of microorganisms mainly come from nitrogen compounds. When using a large amount of Corn steep liquor powder, the mycelium of biomass grows rapidly.
When Corn steep liquor powder is present in the inoculum and fermentation medium, the fermentation system used for ethanol production uses more glucose. Experimental evidence; During the batch shaking fermentation process of glucose supplementation, microorganisms produced 3.5% (w/v) ethanol. When Corn steep powder was added to the fermentation medium, the ethanol yield of glucose increased to 5.0% (w/v). This indicates that adding nutrients such as corn steep powder can increase substrate consumption and produce high ethanol production.
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