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DEVICES AND TECHNIQUES RELATING TO LANDFILL GAS EXTRACTION

  • US 20170216893A1
  • Filed: 03/13/2017
  • Published: 08/03/2017
  • Est. Priority Date: 11/04/2013
  • Status: Active Grant
First Claim
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1. A control system for controlling extraction of landfill gas from a landfill via a gas extraction system, the gas extraction system comprising at least one vacuum source, well piping, and at least one well coupled to the at least one vacuum source through the well piping, the control system comprising:

  • at least one sensor configured to measure one or more characteristics of landfill gas extracted from the landfill;

    at least one flow control mechanism disposed in well piping and configured to control flow rates of the landfill gas; and

    at least one processor configured to;

    obtain measurements, obtained using the at least one sensor, of a flow rate of extracted landfill gas through the at least one flow control mechanism and a concentration of methane in the extracted landfill gas;

    determine a measure of energy content of the extracted landfill gas using the measurements of flow rate and the concentration of methane;

    determine whether the measure of energy content is different from a target energy content; and

    when it is determined that the measure of energy content is different from the target energy content, control the at least one flow control mechanism to change energy content of landfill gas being extracted from the landfill.

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