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Waste Management Module - Coggle Diagram

Waste Management Module

Unit I. Hazardous and Non-Hazardous Waste

Origins and types, measurement

Waste can come from industries, homes, and hospitals.

Classified as hazardous (toxic, flammable) and non-hazardous (organic, recyclable).

Measured by volume, weight, or contaminant concentration.

Characteristics of solid waste

Different levels of biodegradability and hazard.

Composition affects handling and treatment.

Physical, chemical, and biological properties

Chemical: pH, toxicity, organic content.

Biological: presence of microorganisms and biodegradability.

Unit II. Urban Solid Waste

Collection of urban solid waste

Carried out with planned routes for efficiency.

Includes differentiated bins for recycling.

Frequency depends on population density.

Basic operations for separation and processing of residual materials

Initial treatments like shredding or washing.

Facilities for handling, transport, and storage of solid waste

Transfer centers to optimize transport.

Temporary storage in controlled areas to avoid contamination.

Unit III. Valorization of the Organic Fraction of Non-Hazardous Waste – Microbiology of the Process

Factors involved in the process

Ideal temperature for microorganisms (mesophilic or thermophilic).

Adequate moisture for biological activity.

Oxygen availability for aerobic decomposition.

Phases of fermentation

Initial phase: rapid breakdown of easy material.

Stabilization phase: slow degradation and humus production.

Final phase: compost maturation and nutrient stabilization.

Composting process

Collection and mixing of organic waste.

Control of temperature, moisture, and aeration.

Maturation to obtain stable, soil-beneficial product.

Unit IV. Valorization of the Organic Fraction of Non-Hazardous Waste – Biogas Production

Microbiology of the process

Anaerobic microorganisms break down organic matter.

Produce methane (CH4) and carbon dioxide (CO2).

Microbial activity depends on oxygen-free environment.

Factors involved and phases of digestion

Temperature, pH, and organic load are key.

Phases: hydrolysis, acidogenesis, acetogenesis, methanogenesis.

Each phase transforms organic matter into biogas and digestate.

Biogas production process

Waste introduced into anaerobic digesters.

Biogas produced and captured for energy.

Unit V. Valorization of the Combustible Fraction
Incineration

Incineration

Controlled combustion reduces waste volume.

Waste combustion

Requires control of temperature and oxygen.

Converts organic matter to CO2 and steam.

Systems needed to avoid toxic emissions.

Cooling of combustion fumes

Control of air pollution

Filters and scrubbers remove gases and particles.

Strict regulations to protect public health.

Produced solid waste

Gasification

Converts waste into combustible gas at high temperature.

Pyrolysis

Used for energy and chemical recycling.

Unit VI. Landfills

Site selection

Away from populated areas and water bodies.

Accessible with suitable environmental conditions.

Basic studies for project drafting

Geological and hydrogeological analysis.

Project elements

Drainage and leachate collection systems.

Monitoring and environmental control plan.

Classification of non-hazardous waste landfills

Controlled, sanitary, and special landfills.

Use of liners to protect soil and water.

Methods for exploitation of non-hazardous waste landfills

Sanitary filling with compaction and daily cover.

Techniques to minimize odors and vectors.

Specific problems in landfill operation

Landfill recovery and post-use

Hazardous waste landfills

Require special confinement with double liners.

Strict monitoring of leachates and emissions.

Enhanced safety measures to prevent leaks.

Secure deposits

Temporary storage with controlled conditions.

Prepared for final disposal or treatment.