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A biogas upgrader is a facility that is used to concentrate the methane in biogas to natural gas standards. The system removes carbon dioxide , hydrogen sulphide , [ 1 ] water and contaminants from the biogas.
In the early 2000s the facility was subject to numerous safety audits and facility upgrades, completed in 2004. In 2005, Greka shut the plant down temporarily in a planned 10-year turnaround to upgrade the equipment further, and in November of that year received a permit to process wastewater, which is now used to irrigate surrounding cropland.
An upgrader is a facility that upgrades bitumen (extra heavy oil) into synthetic crude oil. Upgrader plants are typically located close to oil sands production, for example, the Athabasca oil sands in Alberta , Canada or the Orinoco tar sands in Venezuela .
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