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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.
Kingston upon Hull, usually shortened to Hull, is a port city and unitary authority area in the East Riding of Yorkshire, England.[2] It lies upon the River Hull at its confluence with the Humber Estuary, 25 miles (40 km) inland from the North Sea and 37 miles (60 km) south-east of York, the historic county town.[2] With a population of 268,852 (2022), it is the fourth-largest city in the Yorkshire and the Humber region after Leeds, Sheffield and Bradford.
The town of Wyke on Hull was founded late in the 12th century by the monks of Meaux Abbey as a port from which to export their wool. Renamed Kings-town upon Hull in 1299, Hull had been a market town,[3] military supply port,[4] trading centre,[5] fishing and whaling centre and industrial metropolis.[4] Hull was an early theatre of battle in the English Civil Wars.[5] Its 18th-century Member of Parliament, William Wilberforce, took a prominent part in the abolition of the slave trade in Britain.[6]
More than 95% of the city was damaged or destroyed in the blitz and suffered a period of post-industrial decline (social deprivation, education and policing).[7] The destroyed areas of the city were rebuilt in the post–Second World War period.[8] In the early 21st century spending boom before the late 2000s recession the city saw large amounts of new retail, commercial, housing and public service construction spending.
In 2017, it was the UK City of Culture and hosted the Turner Prize at the city's Ferens Art Gallery.[9] Other notable landmarks in the city are the Minster, the tidal surge barrier, the Paragon Interchange and The Deep aquarium. Areas of the town centre include the old town (including its museum quarter) and the marina. Hull University was founded in 1927 and had over 16,000 students in 2022.[10] Rugby league football teams include clubs Hull F.C. and Hull Kingston Rovers. The city's association football club is Hull City (EFL Championship). Hull RUFC and Hull Ionians both play in the National League 2 North of rugby union.
