Continuous biodiesel production using in situ glycerol separation by membrane bioreactor system

Area of Science:

• Biotechnology
• Renewable Energy
• Enzyme Engineering

Background:

• Biodiesel is a key renewable fuel, with Candida antarctica lipase B (CalB) showing high activity and stability.
• Enzyme deactivation by methanol and glycerol inhibition limit industrial CalB application in biodiesel production.
• Current methods for methanol inhibition are insufficient to address glycerol's negative effects.

Purpose of the Study:

• To develop a continuous membrane bioreactor system for efficient biodiesel production.
• To mitigate methanol inhibition and remove glycerol during the enzymatic biodiesel synthesis process.
• To enhance the operational stability and reusability of Candida antarctica lipase B (CalB).

Main Methods:

• Implementation of a continuous membrane bioreactor system for biodiesel synthesis.
• Stepwise and continuous methanol feeding strategies were investigated.
• In-situ glycerol removal using membrane technology.
• Enzyme activity and stability assays under operational conditions.

Main Results:

• The membrane bioreactor system effectively removed glycerol, alleviating its inhibitory effects.
• Continuous methanol feeding through the membrane system reduced enzyme deactivation.
• Enhanced operational stability and prolonged enzyme activity were observed.
• High biodiesel yields were achieved with the integrated system.

Conclusions:

• A continuous membrane bioreactor system offers a viable solution for efficient biodiesel production.
• This approach effectively addresses key limitations of using Candida antarctica lipase B (CalB) in industrial settings.
• The system demonstrates potential for cost-effective and sustainable biodiesel manufacturing.