Leachate Collection Pump Stations
The collection, handling, and management of water runoff from landfill sites is one of the most important aspects of environmental responsibility. Leachate collection is carefully managed and controlled, and the storage of collected leachate, and pumping for transport or onsite treatment is critical infrastructure. Pump stations become as critical to the success of the landfill as anything.
Leachate is a liquid that is formed when rainwater percolates through landfill waste and typically contains high levels of organic and inorganic contaminants, including heavy metals and volatile organic compounds (VOCs). This liquid is often highly toxic and corrosive and poses a risk to the environment. As you can conclude, this makes it uniquely difficult to dispose of properly. That is where a leachate pump station design comes into play.HDPE Wet Wells
Leachate collection pump stations typically consist of a wet well, submersible pumps, mechanical components, piping, valves and a control panel. The most durable wet wells are manufactured using structural high-density polyethylene (HDPE), a thermoplastic material that is known for its proven chemical resistance and durability that blocks the corrosive effects of leachate. Without the need for any protective surface coatings, HDPE is resistant to chemical degradation, provides a long service life, and comes prepackaged as a monolithic structure to eliminate the risk of leaking. The submersible pumps are located within the wet well and used to pump the leachate to a transport vehicle or onsite treatment facility for safe neutralizing and disposal.
HDPE Structural Calculations
- Manufacturing Standards: ASTM F894
- Pipe Size: 18 in. to 132 in. I.D.
- Pipe Ring Stiffness: Up to 400
- Pipe Length: Up to 50 ft.
- Pressure Rating: Up to 30 PSI
- Pipe Connection: Welded or Flanged
- Flexural Modulus: 80,000 - 110,000 PSI
- Tensile Strengths: 3,000 - 5,000 PSI
- Certifications: NSF, BNQ
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Friction Factor; Hazen-Williams / Manning: 150-155 / 0.01