   # A landfill initially receives 1000 tons/ day of waste. This receipt rate increases 10% per year. The landfill is closed at the end of the fourth year. Using the EPA exponential model, calculate the yearly gas production for 20 years after opening. What is the peak gas production in m’/yr? ### Solid Waste Engineering

3rd Edition
Worrell + 1 other
Publisher: Cengage Learning,
ISBN: 9781305635203

#### Solutions

Chapter
Section ### Solid Waste Engineering

3rd Edition
Worrell + 1 other
Publisher: Cengage Learning,
ISBN: 9781305635203
Chapter 8, Problem 8.5P
Textbook Problem
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## A landfill initially receives 1000 tons/ day of waste. This receipt rate increases 10% per year. The landfill is closed at the end of the fourth year. Using the EPA exponential model, calculate the yearly gas production for 20 years after opening. What is the peak gas production in m’/yr?

To determine

The peak gas production in m3/yr .

### Explanation of Solution

Given data:

Quantity of waste is 1000tons/day .

Receipt rate is 10%peryear .

Concept used:

Write the expression to calculate the total gas emission.

QT=i=1n2kLomiekt ..... (I)

Here, the total gas emission rate is QT , the total time period of waste placement is n , the landfill emission constant is k and the methane generation potential is Lo , the age of ith section of waste time is ti and the mass of wet waste placed in time i is Mi.

Calculation:

Assume landfill emission constant as 0.0305peryear and methane generation potential as 100m3/tonne .

Calculate the mass of wet waste per year.

Mi=(1000tonnes/day)(365days1year)=1000×365tonnes/year=365,000tonnes/year

Calculate the total gas emission rate

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