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A new method of preparing butanol from corn steep dry powder

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  • Time of issue:2021-02-24
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(Summary description)

A new method of preparing butanol from corn steep dry powder

(Summary description)

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2021-02-2458
  • Views:
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Butanol is an important organic chemical raw material, widely used, mainly used in dibutyl phthalate (DBP), fatty acids, butyl phosphate, butyl acrylate and acetate; butanol is a new renewable energy, its calorific value is higher than ethanol, can be mixed with gasoline in any proportion. Acetone butanol fermentation is a traditional batch fermentation. Since the founding of the people's Republic of China, corn flour has been used in the industrial production of acetone butanol fermentation. At the same time, a stable fermentation process has been formed. In recent years, mankind has attached great importance to the use of renewable resources to produce chemical raw materials and energy materials. At present, one of the important factors limiting the development of butanol fermentation industry is the high cost of fermentation substrate. Looking for low-cost fermentation substrate plays a decisive role in the development of butanol fermentation industry.

 

Corn steep liquor powder is made from corn steep liquor through low temperature, instant heating and spray drying. The water-soluble protein is well preserved, and its moisture content is less than 8%. It is easy to store and transport. It is a new product of corn syrup. In a starch plant with an annual output of 300000 tons, the dry matter content of corn steep liquor powder is 6% - 8%, the protein content is more than 40%, and the COD content is 80 000-90 000 mg / L. The annual production of corns steep liquor powder is as high as 350000 tons. Corn steep liquor powder can promote the biosynthesis of penicillin and other antibiotics, and is widely used as an organic nitrogen source in microbial growth. Butanol was produced by corn steep liquor powder fermentation, and the simplified medium composition based on starch corn steep liquor powder was optimized for butanol fermentation. The results showed that the total solvent yield of fermentation medium composed of 5.5% starch, 8.5% corn steep liquor powder solution and 0.2% KH2PO4 was 19.3 g / L. In P2 medium, corn steep liquor powder was used to replace the nutrient elements other than glucose, and a better solvent yield was obtained.

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