Solid and Hazardous Waste
Solid and hazardous waste management is the systematic handling, treatment, and disposal of discarded materials to protect health and the environment.
Definition
Discarded solid, semi-solid, or containerized materials, including hazardous wastes that are ignitable, corrosive, reactive, or toxic, that require management to prevent harm to human health and the environment.
Scope
This area covers the generation, characterization, collection, treatment, and disposal of solid waste, from municipal refuse to industrial and hazardous wastes. It addresses the waste-management hierarchy of prevention, reuse, recycling, recovery, and disposal, the engineering of sanitary landfills, the identification and handling of hazardous wastes, and resource recovery. Remediation of legacy disposal sites is introduced under remediation technologies.
Sub-topics
Core questions
- How is municipal solid waste generated, characterized, and collected?
- What makes a waste hazardous and how is it identified?
- How are sanitary landfills engineered to contain waste and leachate?
- How do recycling and waste minimization reduce disposal needs?
Key theories
- Waste-management hierarchy
- Waste strategies are prioritized as prevention, reuse, recycling, energy recovery, and finally disposal, directing effort toward reducing waste at the source before relying on treatment and landfilling.
- Hazardous-waste characterization
- A waste is classified as hazardous either by appearing on regulatory lists or by exhibiting characteristics of ignitability, corrosivity, reactivity, or toxicity, which determines how it must be managed.
Clinical relevance
Poorly managed solid and hazardous waste can contaminate air, water, and soil and create exposure hazards; sound characterization and engineered disposal underpin pollution prevention and the protection of communities and groundwater.
Evidence & guidelines
Waste classification and disposal practice commonly follow regulatory frameworks that define hazardous-waste criteria and landfill design requirements; these are described here to explain how waste is managed rather than as prescriptive rules.
History
Open dumping and burning gave way in the mid-twentieth century to engineered sanitary landfills, and growing concern over toxic wastes led to dedicated hazardous-waste regulation and an emphasis on minimization and recycling.
Related topics
Seminal works
- tchobanoglous1993
- lagrega2010
- davis2008
Frequently asked questions
- What makes a waste hazardous?
- A waste is considered hazardous if it is specifically listed by regulators or if it exhibits one or more hazardous characteristics, typically ignitability, corrosivity, reactivity, or toxicity, which require special handling and disposal.
- Why is a sanitary landfill different from a dump?
- A sanitary landfill is an engineered facility with liners, leachate collection, gas management, and daily cover designed to isolate waste from the environment, whereas an open dump lacks these controls and readily pollutes air, soil, and water.