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18-Env-B5 Industrial & Hazardous Waste Management · December 2017

Question 11 of 28: Managing Biomedical Wastes

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

Notes on this paper

Reference texts: Nemerow & Dasgupta, Industrial and Hazardous Waste Treatment, 2nd ed.; Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery, 5th ed.; Davis & Cornwell, Introduction to Environmental Engineering, 6th ed.; LaGrega, Buckingham & Evans, Hazardous Waste Management, 2nd ed.; CCME, Guidelines for the Management of Biomedical Waste in Canada (1992); Canadian Environmental Protection Act (CEPA), 1999; Basel Convention on the Control of Transboundary Movements of Hazardous Wastes (1989); Canadian Nuclear Safety Commission (CNSC) regulations on radioactive waste; provincial hazardous waste regulations (e.g. BC's Environmental Management Act and Hazardous Waste Regulation).

Question 11: Managing Biomedical Wastes (4 marks)

Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.

Biomedical (health-care) waste management in Canada follows CCME's Guidelines for the Management of Biomedical Waste, applied provincially (e.g. CSA Z317.10). The core steps are: segregate by category at the point of generation (human anatomical, animal, microbiology/lab, blood & body fluids, sharps, general), use colour-coded/labelled containers, minimize storage time, and treat/dispose by a method matched to the category.

  1. Solid biomedical waste (sharps, contaminated dressings, cultures, anatomical material) — segregated at source into puncture-resistant (sharps) or leak-proof biohazard bags/containers, then autoclaved (steam sterilization) or incinerated; anatomical waste is typically incinerated or cremated per provincial requirements; treated residue can then go to a regular landfill.
  2. Liquid biomedical waste (blood, body fluids, contaminated liquids) — typically disinfected chemically (e.g. hypochlorite) or by autoclaving in a sealed container before discharge to sanitary sewer under the facility's discharge permit; large volumes may require solidification before landfill disposal, since most jurisdictions restrict free liquids to landfill.