Disposal

Infectious Waste

What is infectious waste?

According to the State of Wisconsin, the following items are presumed to be infectious waste.

  • All sharps- these include hypodermic needles, syringes with needles, scalpel blades, lancets, broken glass, rigid plastic vials, laboratory slides.
  • Bulk blood or body fluids- includes pourable or drippable amounts of blood or body fluids or items saturated with blood or body fluids.
  • Microbiological laboratory waste, such as cultures derived from clinical specimens and discarded laboratory equipment that has contacted cultures.
  • Human tissue, including teeth but not hair or nails.
  • Tissue, bulk blood or body fluids from an animal carrying a zoonotic infectious agent such as rabies, anthrax or tuberculosis.

How do I dispose of used needles, scalpels, etc.? 

All sharps-related regulated medical waste is handled by Madison Environmental Resourcing, Inc. (MERI). They process all sharps that cannot be autoclaved and disposed of in general trash, which includes needles, lancets (fingerstick devices), syringes, auto injectors, scalpel blades, pipettes, and discarded glass or rigid vials containing infectious agents.

To collect your sharps, use an approved needles container, fill to 2/3 full maximum (do not push down on waste to make space for more- risk of needlestick injury). When it is 2/3 full, contact the UWM Environmental Protection Program for pickup of the sharps container. They will coordinate the pickup with MERI. It is okay to use any hard-sided container that is puncture-resistant, as long as it is CLEARLY indicated on the container what it is used for and it is NOT overfilled.

 

How do I dispose of used other used sharps, such as pipet tips, glass slides and coverslips, etc.?

What can be put in a biohazardous sharps waste container?

You may place any contaminated glass or hard plastic, broken contaminated glass or hard plastic into this container. These include slides, coverslips, capillary pipets, disposable culture tubes, pipet tips, glass vials, centrifuge tubes, etc. Do not include any of the sharps waste that must be sent to MERI (see above). Any containers used to collect this waste must be autoclavable or able to hold disinfectant appropriate for decontamination. Once this waste has been autoclaved, it can be disposed of in the general trash. You can decontaminate using a 25% bleach solution (1 part commercial bleach: 4 parts water) covering the contaminated materials for 30 minutes, or autoclave, then dispose.

 

How do I dispose of all other biohazardous waste? 

All cell cultures, microbiological waste, animal bedding and feces, and contaminated materials such as gloves or paper toweling are to be placed in an autoclavable biohazardous bag in a secondary container. When 2/3 full, remove, place in an autoclavable secondary container, and follow the instructions for the autoclave being used to decontaminate contents. Waste that has been autoclaved, cooled, and sealed is to be placed in a black garbage bag and placed in general trash. Red autoclavable biohazard bags must be disposed of in this manner. It is advised to not use red autoclave bags.

Items saturated with whole blood or blood components, blood specimens, semen, vaginal secretions, and body fluids visibly contaminated with blood. Pourable amounts of blood or body fluids should be discarded through the sewer system (WI Administrative Code NR 526.11.2.d,e)
Examples: Emptied blood tubes, blood saturated gauze, Microbiology Cultures

What can I throw in the general trash? 

Any waste generated that has not been contaminated in any way by biohazardous materials may be disposed of in the trash. For broken glass, maintain a broken glassware container that can be moved to general trash when full.