Devices and techniques relating to landfill gas extraction
First Claim
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 the well piping and configured to control flow of the landfill gas through the well piping; and
at least one processor configured to;
obtain a measured concentration, obtained using the at least one sensor, of a first gas in landfill gas extracted from the landfill;
determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration;
when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to reduce flow rate of landfill gas through the at least one flow control mechanism; and
when it is determined that the measured concentration is greater than the second threshold concentration, control the at least one flow control mechanism to increase the flow rate of landfill gas through the at least one flow control mechanism.
2 Assignments
0 Petitions
Accused Products
Abstract
A control system for controlling extraction of landfill gas, comprising: at least one sensor configured to measure one or more characteristics of landfill gas; at least one flow control mechanism disposed in well piping and configured to control flow of the landfill gas through the well piping; and at least one processor configured to: obtain a measured concentration of a first gas in landfill gas; determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to reduce flow rate of landfill gas; and when it is determined that the concentration is greater than the second threshold concentration, control the at least one flow control mechanism to increase the flow rate of landfill gas.
96 Citations
21 Claims
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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:
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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 the well piping and configured to control flow of the landfill gas through the well piping; and at least one processor configured to; obtain a measured concentration, obtained using the at least one sensor, of a first gas in landfill gas extracted from the landfill; determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to reduce flow rate of landfill gas through the at least one flow control mechanism; and when it is determined that the measured concentration is greater than the second threshold concentration, control the at least one flow control mechanism to increase the flow rate of landfill gas through the at least one flow control mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling extraction of landfill gas from a landfill via a control system, the control system comprising at least one sensor and at least one flow control mechanism configured to control flow of landfill gas through well piping in a gas extraction system, the method comprising:
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measuring, using the at least one sensor, a concentration of a first gas in landfill gas extracted from the landfill, determining whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, controlling the at least one flow control mechanism to reduce the flow rate of landfill gas through the at least one flow control mechanism; and when it is determined that the measured concentration is greater than the second threshold concentration, controlling the at least one flow control mechanism to increase the flow rate of landfill gas through the at least one flow control mechanism. - View Dependent Claims (13, 14, 15, 16, 17)
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18. 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:
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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 the well piping and configured to control flow of the landfill gas through the well piping, wherein the at least one flow control mechanism comprises a valve; and at least one processor configured to; obtain a measured concentration, obtained using the at least one sensor, of a first gas in landfill gas extracted from the landfill; determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to increase flow rate of landfill gas through the at least one flow control mechanism at least in part by opening the valve in predefined increments; and when it is determined that the measured concentration is greater than the second threshold concentration, control the at least one flow control mechanism to decrease the flow rate of landfill gas through the at least one flow control mechanism at least in part by closing the valve in predefined increments. - View Dependent Claims (19, 20, 21)
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Specification