Health care waste encompasses all the waste generated during medical diagnosis, treatment, immunization, or research involving humans and animals. Nurses produce a significant portion of this daily output at the bedside. Proper segregation is the cornerstone of effective waste management. Mixing hazardous materials with ordinary refuse multiplies disposal costs and converts harmless domestic rubbish into dangerous infectious threats. Safe handling practices protect waste handlers, patients, and the wider community from accidental exposure, needle-stick injuries, and environmental contamination.
Approximately 75 to 90 percent of waste produced by health care facilities is general, non-hazardous waste. This category poses no special biological, chemical, or physical hazard. It is comparable to domestic household waste and can be handled by municipal waste disposal systems.
Infectious waste contains pathogens in sufficient concentration to cause disease. This includes materials saturated with blood or body fluids, laboratory cultures, and isolation waste from patients with contagious diseases. Pathological waste consists of human tissues, organs, body parts, and recognizable fetuses. Both categories demand rigorous handling to prevent nosocomial outbreaks and community contamination. Standard disposal methods typically involve high-temperature incineration or autoclaving followed by secure shredding.
Sharps include any object that can puncture or cut skin, such as needles, scalpels, infusion sets with needles, and broken glass. Sharps injuries expose nurses and waste handlers to blood-borne pathogens like Hepatitis B, Hepatitis C, and HIV.
Safety rules for sharps management:
Pharmaceutical waste includes expired, unused, or contaminated drugs, vaccines, and sera. Cytotoxic waste is a specialized, highly hazardous subset consisting of drugs with teratogenic, mutagenic, or carcinogenic properties, commonly used in cancer treatment. Chemical waste comprises discarded solid, liquid, and gaseous chemicals from diagnostic procedures, cleaning agents, and laboratory reagents. These substances can poison water sources or cause severe chemical burns if dumped improperly into standard drains.
Standardized color-coding ensures that health care waste is easily sorted and handled safely across all Nigerian health facilities. While specific institutional guidelines apply, national frameworks generally align with global standards:
| Waste Category | Container Color / Type | Typical Contents |
|---|---|---|
| General Waste | Black bin / bag | Food scraps, office paper, packaging |
| Infectious Waste | Yellow bin / bag with biohazard symbol | Soiled dressings, swabs, disposable gowns |
| Sharps Waste | Yellow puncture-proof box | Needles, scalpel blades, lancets |
| Radioactive / Highly Hazardous | Lead-lined containers or specialized bins | Radioactive isotopes, heavy chemical residues |