Chapter 5: Problem 7

Why are landfills considered a better waste management option than open dumps?

Short Answer

Expert verified

Landfills are considered a better waste management option than open dumps due to their carefully engineered design, regulated operations, protective measures, and post-closure monitoring. They minimize environmental impact and protect public health, while open dumps lack proper waste disposal mechanisms, posing various hazards to the environment and human health.

Step by step solution

Understanding the differences between landfills and open dumps

An open dump is an unregulated and uncontrolled site where people dispose of waste materials. It typically lacks necessary environmental protection measures and proper waste disposal mechanisms. On the other hand, a landfill is a carefully engineered and managed waste disposal facility designed to minimize environmental impact and protect public health.

Evaluating the design of landfills and open dumps

Landfills are designed with several protective features, such as liners and leachate collection systems. A liner prevents contaminants from entering the surrounding soil and water systems, while a leachate collection system captures and removes liquids produced as waste decomposes. This protects groundwater sources from contamination. Open dumps don't have these protective features and pose a higher risk of polluting the environment.

Comparing the operation of landfills and open dumps

Landfills are operated under strict regulations to prevent environmental pollution and health risks. Waste materials are compacted and covered with soil or other materials daily to minimize odors and control the spread of disease-causing organisms. Moreover, proper gas management systems are installed to collect and treat landfill gases, such as methane and carbon dioxide. Conversely, open dumps are not managed, allowing waste to accumulate without compaction, covering, or proper odor and gas management, posing potential hazards to human health and the environment.

Assessing monitoring and aftercare in landfills and open dumps

Landfills are continuously monitored during their active life and through post-closure care. Monitoring includes measuring air quality, surface water, and groundwater to detect any signs of environmental pollution. Additionally, operators closely monitor landfill gas production and the resulting potential for explosion or fire hazards. Open dumps, however, generally have no regular monitoring or aftercare, leaving them prone to ongoing and unnoticed environmental degradation and health risks.

Conclusion

In conclusion, comparing landfills and open dumps, we can see that landfills are a better waste management option due to their carefully engineered design, regulated operations, protective measures, and post-closure monitoring. Landfills are more effective in minimizing environmental impact and protecting public health compared to open dumps, which lack proper waste disposal mechanisms and pose various hazards to the environment and human health.

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Why are landfills considered a better waste management option than open dumps?

Short Answer

Step by step solution

Understanding the differences between landfills and open dumps

Evaluating the design of landfills and open dumps

Comparing the operation of landfills and open dumps

Assessing monitoring and aftercare in landfills and open dumps

Conclusion

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