Follow these procedures to help ensure that the waste you are autoclaving is properly disinfected prior to disposal.
- To allow for sufficient steam access or penetration of the waste, the waste must be:
- packaged according to the recommendations provided by the manufacturer; and
- loaded into the chamber so as not to exceed the capacity limits as set by the manufacturer.
Note: A perforated tray will allow more steam penetration to the waste than a solid walled tray. Autoclave Safety Video by The National Biosafety and Biocontainment Training Program, The National Institutes of Health and Dartmouth College.
After treatment, follow these procedures for the proper handling of the waste material.
Place a label on the bag or container (available from EHS) and place the labeled bag into another sealed bag or container that is a different color and is opaque, e.g., a black trash bag. Then discard into the regular trash.
All lab personnel who treat and dispose of biological waste must keep records of the treatment. See the Disposal Request Form (PDF) for Biological Waste and Sharps and the Autoclave Waste Treatment Record (PDF).
Most autoclaves used to treat waste must be tested on a regular schedule under Texas regulations. If the autoclave you use requires testing you will be provided a test pack(s) by EHS.
The test pack consists of an ampoule containing bacterial spores and media along with a plastic tube which holds the ampoule.
- Be sure to run the test pack(s) according to the schedule outlined by EHS and in the identified autoclave.
- Put the test pack near the drain, along with a load of waste or other materials.
- When the autoclave cycle is complete, promptly remove the test pack, open it, push the cap down on the ampoule, and put the ampoule back into the plastic tube.
- Complete the associated test form and call or e-mail EHS for pick-up.
- DO NOT leave the test pack in the autoclave for more than 24 hours.