Solved Problems

Calculations related to waste generation and landfill capacity
Problem 1: Waste Generation Estimation

A city has a population of 50,000 people. The average waste generation rate is 0.8 kg/capita/day.

Procedure

  1. Calculate the total daily waste generation in kg and tons.
  2. If the waste has a compacted density of 500 kg/m³ in the landfill, calculate the volume required per year.

Example

Waste Generation Estimation

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Problem 2: Landfill Lifespan Calculation

A proposed landfill site has a total available volume of 1,000,000 m³. The city generates 30,000 m³ of compacted waste per year.

If the waste generation increases by 2% per year (compounded annually due to population growth and economic factors), how long will the landfill last?

Example

Landfill Lifespan Calculation

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Waste Compaction Density Calculation

Determining volume reduction after compaction

A collection truck receives 2,000 kg2,000 \text{ kg} of loose uncompacted waste with a density of 100 kg/m3100 \text{ kg/m}^3. The truck's compactor reduces the waste volume by a factor of 4 (compaction ratio 4:14:1). Calculate the compacted density and the final volume of the waste.

Example

Calculate Density and Volume

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Case Study: The Payatas Dumpsite Tragedy

The risks of improper solid waste management

In July 2000, a massive trash slide at the Payatas open dumpsite in Quezon City, Philippines, resulted in hundreds of casualties. Analyze the technical and environmental failures that led to this disaster and the engineering solutions to prevent recurrence.

Example

Disaster Analysis

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