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The high-Btu processing equipment can be expected to cost $2,600 to $4,300 per standard cubic foot per minute (scfm) of landfill gas. Annual costs range from $875,000 to $3.5 million to operate, maintain and provide electricity to. [9] Costs depend on quality of the end product gas as well as the size of the project.
Actual cubic foot per minute (ACFM) is the volume of gas flowing anywhere in a system, taking into account its temperature and pressure. If the system were moving a gas at exactly the "standard" condition, then ACFM would equal SCFM. This usually is not the case as the most important change between these two definitions is the pressure.
Yet other definitions are in use for industrial gas, [5] where, in the US, a standard cubic foot for industrial gas use is defined at 70 °F (21.1 °C) and 14.696 psia (101.325 kPa), while in Canada, a standard cubic meter for industrial gas use is defined at 15 °C (59 °F) and 101.325 kPa (14.696 psia).
Direct-fired thermal oxidizer using landfill gas as fuel [3] Regenerative thermal oxidizer (RTO) sized for 17,000 standard cubic feet per minute (SCFM). Control center with a programmable logic controller for a RTO. The simplest technology of thermal oxidation is direct-fired thermal oxidizer.
The pipe system extracts 17,005 standard cubic feet per minute (119 million cubic metres annually) of landfill gases from the collection field, [27] which consists of "over 40,000 linear metres of horizontal gas collection trenches and 80 vertical gas collection wells installed within the landfilled waste". [2]
Landfill gas is a mix of different gases created by the action of microorganisms within a landfill as they decompose organic waste, including for example, food waste and paper waste. Landfill gas is approximately forty to sixty percent methane , with the remainder being mostly carbon dioxide .
Another unit is the SCFM which stands for standard cubic feet per minute. Yet another unit related to SCCM (and SLM) is the PCCM (and PLM) which stands for Perfect Cubic Centimeter per Minute (Perfect Litre per Minute). One PCCM is one SCCM when the gas is ideal.
MMbpd – million barrels per day; MMcf – million cubic feet (of natural gas) MMcfe – million cubic feet (of natural gas equivalent) MMcfge – million cubic feet (of natural gas equivalent) MMS – Minerals Management Service (United States) MMscfd – million standard cubic feet per day; MMTPA – millions of metric tonnes per annum