Filtration sterilization and aseptic manufacture
Start with the big picture
A sterilizing-grade membrane commonly has a 0.22 µm pore size, retaining bacteria and fungi while allowing some smaller agents, including most viruses and some mycoplasmas, to pass. Pre-filters can reduce particulate loading, and membrane materials are selected for compatibility and low extractables. Integrity tests help confirm filter performance before and after use; sterile filtration must be followed by aseptic filling, because a breach afterward compromises sterility. Filtration does not remove pyrogens, endotoxins, or dissolved toxins. Aseptic manufacture therefore combines sterile components with a controlled environment, trained personnel, environmental monitoring, and validated processes such as media-fill simulation. The full lesson develops these principles across equipment, airflow, gowning, monitoring, and risk reduction.
What you'll learn
- Explain how filtration retains microorganisms without inactivating them.
- Describe the retention limits of a 0.22 µm membrane.
- Summarize the roles of pre-filters, membrane choice, and integrity testing.
- Explain why aseptic filling and controlled manufacturing conditions are essential.
- Identify key aseptic controls, including gowning, monitoring, and media-fill simulation.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
