Abstract: An apparatus including: a housing configured for installation in a landfill; a differential pressure sensor and at least one gas sensor in the housing; and a first valve configured to control landfill gas (LFG) flow to the at least one gas sensor, wherein the first valve is configured to open when the differential pressure sensor detects a selected pressure difference or pressure difference change between the atmospheric air pressure and the LFG pressure.

Abstract: Apparatus for co-fuelling a diesel engine including a diesel engine having one or more combustion chambers; a co-fuel tank for containing a liquid co-fuel, the co-fuel tank being in fluid connection with the one or more combustion chambers; co-fuel delivery and delivery control means operatively interposed between the co-fuel tank and the one or more combustion chambers for delivering co-fuel from the co-fuel tank to the one or more combustion chambers; a liquid to gas converter operatively interposed between the co-fuel tank and the one or more combustions chambers for converting the liquid co-fuel from a liquid to a gas; a condensate return for returning any of the co-fuel which recondenses to the co-fuel tank and engine control means operatively associated with the diesel engine and the co-fuel delivery and delivery control means for controlling operation of the diesel engine and the delivery of the co-fuel to the one or more combustion chambers.

Abstract: Apparatus for co-fuelling a diesel engine including a diesel engine having one or more combustion chambers; a co-fuel tank for containing a liquid co-fuel, the co-fuel tank being in fluid connection with the one or more combustion chambers; co-fuel delivery and delivery control means operatively interposed between the co-fuel tank and the one or more combustion chambers for delivering co-fuel from the co-fuel tank to the one or more combustion chambers; a liquid to gas converter operatively interposed between the co-fuel tank and the one or more combustions chambers for converting the liquid co-fuel from a liquid to a gas; and engine control means operatively associated with the diesel engine and the co-fuel delivery and delivery control means for controlling operation of the diesel engine and the delivery of the co-fuel to the one or more combustion chambers.