Landfill Preparation
Landfills must be prepared to accept the trash. A landfill that is being prepared to collect trash is called a Cell. First, using a bulldozers and other large machines, they excavated a huge pit. A cell takes five years to prepare a landfill but only 2 to 3 years to fill it up with garbage. A landfill can collect around 10,000 tons of trash a day, this is why recycling is so important.
Methane Gas Plants
The methane gas is produced from buried trash. This gas is then converted to usable natural gas that helps to heat over 20,000 home. A company process 9 million cubic
feet of gas daily. Four and a half million cubic feet of gas is used as natural gas.
The gas recovery process involves four steps:
- The gas is compressed and dried
- Pre-treatment stage: Volatile organic compounds are removed
- Pressure swing absorption:Carbon dioxide is removed
- product compression: The treated gas is compressed before entering the power plant’s substation
- The well field collection system are designed to operate the gas plants to full capacity.
Well field collection systems
- Wells are drilled 150 to 200 feet apart and 100 feet deep, and they are linked to the
plant’s header collection system
- The width of the boreholes allows methane gas to build up before entering the pipes
- Perforated holes covering 50 percent of each pipe allow gas to enter
- Stone located around and above the perforated areas acts as a gas migration point
filtering dirt and trash
- Two gel seals and dirt lie above the rock to prevent gas from migrating up through
borehole
- A wellhead system containing an orifice plate and valve measures gas flow in an out
the well
Reference
Rumpke Recycling- Landfill Gas Recycling At Rumpke
Sanitary Landfill Near Cincinnati
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