Optimization of Fermentation Medium for Extracellular Lipase Production from Aspergillus niger Using Response Surface...

Area of Science:

• Biotechnology
• Enzyme Engineering
• Industrial Microbiology

Background:

• Lipase from Aspergillus niger is a crucial enzyme in various industrial applications.
• Enhancing lipase production is vital for cost-effective industrial processes.

Purpose of the Study:

• To optimize the medium composition for increased extracellular lipase production by Aspergillus niger.
• To identify key factors influencing lipase yield and establish optimal conditions.

Main Methods:

• Single-factor experiments were conducted to identify influential medium components.
• Statistical optimization using Box-Behnken Design and quadratic models was employed.
• Lipase activity was measured in U/mL under optimized conditions.

Main Results:

• Corn starch (10.5 g/L), soybean meal (35.4 g/L), and soybean oil (10.9 g/L) were determined as optimal concentrations.
• The optimized medium resulted in a lipase activity of 2,171 U/mL, a 16.4% increase.
• The carbon to nitrogen (C/N) ratio was identified as a significant factor affecting enzyme production.

Conclusions:

• Medium optimization significantly enhances lipase production in Aspergillus niger.
• The identified optimal medium composition and C/N ratio provide a validated strategy for industrial lipase yield improvement.