Unit 3015: Bioprocessing Fundamentals and Applications

1. Introduction to Bioprocessing

• Definition and scope of bioprocessing
• Biological systems used in bioprocessing (microorganisms, animal and plant cells)
• Industrial applications: pharmaceuticals, food and beverages, biofuels, and agriculture
• Key components of bioprocessing: biocatalysts, substrates, bioreactors, and downstream processing
• Importance of bioprocessing in sustainability and innovation

2. Bioreactor Design and Operation

2.1 Types of Bioreactors

• Stirred-tank bioreactors
• Airlift bioreactors
• Packed-bed and fluidized-bed reactors
• Membrane bioreactors
• Disposable bioreactors

2.2 Design Considerations

• Geometrical parameters (size, shape)
• Material selection and biocompatibility
• Mixing and aeration methods

2.3 Operational Parameters

• Temperature, pH, dissolved oxygen
• Agitation speed and shear stress
• Nutrient supply and waste removal

2.4 Factors Influencing Operation

• Scale of operation (lab, pilot, industrial)
• Sterility and contamination control
• Instrumentation and process monitoring

3. Upstream Processing

3.1 Cell Culture Techniques

• Types of cell cultures: batch, fed-batch, continuous
• Cell line selection and maintenance

3.2 Media Formulation

• Nutrient requirements: carbon, nitrogen, vitamins, minerals
• Buffer systems and additives

3.3 Inoculum Preparation

• Seed culture development
• Scale-up from shake flasks to bioreactors

3.4 Optimization Strategies

• Control of growth parameters
• Use of fed-batch and perfusion techniques

4. Downstream Processing

4.1 Cell Disruption Techniques

• Mechanical methods: homogenization, sonication
• Non-mechanical methods: enzymatic, chemical

4.2 Purification Techniques

• Filtration (microfiltration, ultrafiltration)
• Chromatography (affinity, ion-exchange, size exclusion)

4.3 Concentration and Drying

• Centrifugation
• Spray drying, lyophilization

4.4 Product Isolation and Formulation

• Removal of impurities
• Stabilization and packaging

5. Scale-Up and Scale-Down Strategies

5.1 Challenges in Scaling

• Maintaining mass and heat transfer efficiency
• Reproducibility of biological conditions

5.2 Scale-Up Methodologies

• Geometric similarity
• Constant power input per volume
• Maintaining oxygen transfer rates

5.3 Scale-Down Models

• Simulating large-scale conditions in lab scale
• Troubleshooting and process development

5.4 Maintaining Product Quality Across Scales

• Analytical methods for comparability
• Process analytical technology (PAT)

6. Quality Control in Biomanufacturing

6.1 Importance of Quality Control

• Ensuring product safety, efficacy, and consistency

6.2 Monitoring Methods

• In-process testing
• Final product testing

6.3 Regulatory Requirements

• Overview of regulatory agencies (FDA, EMA)
• Key regulations and guidelines (GMP, GLP)

6.4 Process Validation and Compliance

• Validation protocols
• Documentation and audits

7. Bioprocess Optimization and Control

7.1 Optimization Strategies

• Design of Experiments (DoE)
• Statistical process control

7.2 Process Modeling

• Kinetic modeling
• Simulation tools

7.3 Feedback Control Systems

• Sensors and actuators
• Automation in bioprocessing

7.4 Real-Time Monitoring

• Use of biosensors
• Data acquisition and analysis

7.5 Cost Reduction and Efficiency Improvement

• Resource optimization
• Waste minimization