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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.
Gedling is a village and former civil parish which gives its name to the larger Borough of Gedling in Nottinghamshire, England. It lies 4 miles (6.4 km) north-east of Nottingham city centre. The parish was abolished in 1935 and absorbed into the urban district of Carlton, which in turn was abolished in 1974 on the creation of borough of Gedling. The population of the Gedling ward at the 2011 census was 6,817[1] and 111,787 for the district.[2] Gedling was recorded in the Domesday Book and is still a distinct settlement, although residential, commercial and industrial growth in the wider borough of Gedling and the neighbouring city of Nottingham, boroughs of Broxtowe and Rushcliffe and district of Ashfield (as well as the Derbyshire boroughs of Amber Valley and Erewash, which have become increasingly urban around Nottingham) means it can be difficult to distinguish the village of Gedling from the nearby town of Carlton, with which it has become contiguous.
Gedling was first settled around Saxon times, when the Saxon chief Gedl (hence the name Gedling, coming from the chief "Gedl" and "Ing" being Saxon for People, Gedl-Ing meaning "Gedl's People") sailed up the River Trent, and then up the Little Ouse dyke, until he could get no further upstream. He landed at the spot which is thought to be the present-day site of All Saints' Church. Gedling has had several versions of its name including Ghellinge, Gedlinga, Geddlings, and Gettang.
Despite being a fairly small place, Gedling gives its name to the local borough council which has its offices in nearby Arnold, and also to the local parliamentary constituency, which covers the suburbs to the east of Nottingham, including Arnold and Carlton. Village pubs are the Gedling Inn (once the Chesterfield Arms) and The Willowbrook on Main Road.
