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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.
Bedfordshire (/ˈbɛdfərdʃɪər, -ʃər/; abbreviated Beds) is a ceremonial and historic county in the East of England. It is bordered by Northamptonshire to the north, Cambridgeshire to the north-east, Hertfordshire to the south and the south-east, and Buckinghamshire to the west. The largest settlement is Luton which had a population of 225,262 in 2021.[2]
The county has an area of 1,235 km2 (477 sq mi) and a population of 704,736 as of the 2021 census.[1] Bedford is the county town. Market towns include Leighton Buzzard, Dunstable, and Biggleswade. Much of the county is rural. Bedfordshire consists of the unitary authority areas of the Borough of Bedford, Central Bedfordshire and Borough of Luton.
The county's highest point is 243 m (797 ft) on Dunstable Downs in the Chilterns.[3]
