Non-linear valve adjustments for landfill gas extraction

A method for controlling extraction of landfill gas from a landfill via a gas extraction system comprising a valve configured to control flow rate of landfill gas extracted from the landfill, the method comprising:

• determining, using a target change in flow rate through the valve and a degree to which the valve is open at the time of the determining, an adjustment to apply to the valve, the adjustment indicative of a determined degree to which to open or close the valve in order to achieve the target change in flow rate of landfill gas through the valve;
• and
• opening or closing the valve by the determined degree.

At least one non-transitory computer-readable storage medium having encoded thereon instructions that, when executed by at least one processor, cause the at least one controller to perform a method for controlling extraction of landfill gas from a landfill via a gas extraction system comprising a valve configured to control flow rate of landfill gas extracted from the landfill, the method comprising:

• determining, using a target change in flow rate through the valve and a degree to which the valve is open at the time of the determining, an adjustment to apply to the valve, the adjustment indicative of a determined degree to which to open or close the valve in order to achieve the target change in flow rate of landfill gas through the valve;
• and
• opening or closing the valve by the determined degree.