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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.
Hucknall (/ˈhʌknɔːl/), formerly Hucknall Torkard (/ˈtɔːrkərd/), is a market town in the Ashfield district of Nottinghamshire, England. It lies 7 miles (11 km) north of Nottingham, 7 miles (11 km) southeast of Kirkby-in-Ashfield, 9 miles (14 km) from Mansfield and 10 miles (16 km)south of Sutton-in-Ashfield. It is the second-largest town in the Ashfield district after Sutton-in-Ashfield.
Hucknall is on the west bank of the Leen Valley, on land which rises from the Trent Valley in the south and extends northwards to Kirkby-in-Ashfield. The Whyburn or Town Brook flows through the town centre. Farleys Brook marks its southern boundary. Due to the mass amount of housing and industrial estates along the southside of the town. Hucknall is contiguous with the wider City of Nottingham with the suburbs of Bulwell and Bestwood Village both to the south and southeast.
Hucknall town centre
The town's highest point is Long Hill, at 460 ft (140 m) above sea level, with views over the city and Trent Valley, which descends to 22–24 metres (72–79 ft) AOD, flowing just beyond most of the city centre.[2]
The town is surrounded by farmland or parkland. To the north-west lie Misk Hills and Annesley. To the north-east of the town are the villages of Linby and Papplewick, and beyond these two, Newstead Abbey and its grounds, once the residence of Lord Byron. To the west lies Eastwood, birthplace of D. H. Lawrence and an inspiration for many of his novels and short stories. To the east of the town is Bestwood Country Park.
The contiguous settlements of Butler's Hill and Westville often appear as distinct entities on maps, but are generally seen as parts of Hucknall. They belong to its historic and present-day Church of England parish, although the town itself has no civil parish council. The identity is reinforced by being part of the post town and by being shared wards of Hucknall.
