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Biogas
Biogas is a gaseous renewable energy source[1] produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste, wastewater, and food waste. Biogas is produced by anaerobic digestion with anaerobic organisms or methanogens inside an anaerobic digester, biodigester or a bioreactor.[2] The gas composition is primarily methane (CH
4) and carbon dioxide (CO
2) and may have small amounts of hydrogen sulfide (H
2S), moisture and siloxanes. The methane can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used in fuel cells and for heating purpose, such as in cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.[3]
After removal of carbon dioxide and hydrogen sulfide it can be compressed in the same way as natural gas and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel.[4] It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards, when it becomes bio-methane. Biogas is considered to be a renewable resource because its production-and-use cycle is continuous, and it generates no net carbon dioxide. From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy.
Castleford is a town within the City of Wakefield district, West Yorkshire, England. It had a population of 45,106 at a 2021 population estimate.[1] Historically in the West Riding of Yorkshire, to the north of the town centre the River Calder joins the River Aire and the Aire and Calder Navigation. It is located north east of Wakefield, north of Pontefract and south east of Leeds. Castleford is the largest town in the Wakefield district after Wakefield itself.
The town is the site of a Roman settlement. Within the historical Municipal Borough of Castleford are the suburbs of Airedale, Cutsyke, Ferry Fryston, Fryston Village, Glasshoughton, Half Acres, Hightown, Lock Lane, Townville, Wheldale and Whitwood.
Castleford is home to the rugby league Super League team Castleford Tigers.
