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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.
Colwick (/ˈkɒlɪk/ KOL-ik) is a village and civil parish, in the Borough of Gedling of Nottinghamshire, England. It is situated to the east of Nottingham's city boundary, and forms the Colwick ward. At the time of the 2011 census, the village had a population of 2,829, falling to 2,778 at the 2021 census.
The village is recorded in the Domesday Book of 1086,[4] since when the De-Colwick,Musters and Byron families have all owned the village. The etymology of the place-name is from Old English wic "specialised industrial farm" with an uncertain first element, possibly col "coal",[citation needed] although there have never been coal mines in the area. Another derivation is from the area being a dairy farm.
In 1844 there was a gruesome murder at 'Saville's Spinney', then part of Colwick Park and later part of Colwick Woods. William Saville murdered his wife and three children in the woods on Tuesday 21 May. Their bodies were found one day later by John Swinscoe of Carlton who fetched the parish constable to the spot. An open razor was found in the left hand of the dead woman. The crowd for Saville's execution numbered in the tens of thousands and twelve died in a panic in the moments after Saville was executed.
