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Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
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Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...
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[Dry solid staging fermentation].

Hongxian Xu1, Gang Duan

  • 1A Danisco Division, Genencor (Wuxi) Bio-products Ltd., Wuxi 214028, China. Sophia.xu@danisco.com

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|May 23, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a new dry solids staging technique for uncooked, very high gravity (VHG) ethanolic fermentation. This method enhances fuel ethanol production efficiency compared to conventional processes.

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Sustainable Energy

Context:

  • Very high gravity (VHG) ethanolic fermentation offers a promising route for efficient fuel ethanol production.
  • Traditional hot cook processes present control challenges in high-gravity fermentation.
  • Uncooked processes using milled grain slurry and enzymes simplify VHG fermentation control.

Purpose:

  • To report the novel application of a dry solids staging technique in an uncooked process for VHG ethanolic fermentation.
  • To compare the performance of this new technique against conventional batch fermentation under varying conditions.
  • To evaluate the impact of initial fermentation concentrations and starting times on ethanol yield.

Summary:

  • A dry solids staging technique was successfully implemented in an uncooked VHG ethanolic fermentation process.
  • The new process demonstrated improved ethanol output compared to the conventional method at 30% dry solids and 0.22% enzyme dose.
  • Final ethanol concentration reached 18.50% (V/V) with the new technique, versus 17.06% (V/V) conventionally.

Impact:

  • This research showcases a new application of uncooked fermentation technology, enhancing fuel ethanol production.
  • The findings suggest a more efficient and controllable method for industrial-scale ethanol fermentation.
  • Demonstrates potential for increased yields and improved process economics in bioethanol production.