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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.
Stroud is a market town and civil parish in Gloucestershire, England. It is the main town in Stroud District. The town's population was 13,500 in 2021.[1]
Below the western escarpment of the Cotswold Hills, at the meeting point of the Five Valleys, the town is noted for its steep streets. The Cotswold Area of Outstanding Natural Beauty surrounds the town, and the Cotswold Way path passes by it to the west. It lies 10 miles (16 km) south of the city of Gloucester, 14 miles (23 km) south-southwest of Cheltenham, 13 miles (21 km) west-northwest of Cirencester and 26 miles (42 km) north-east of the city of Bristol. London is 91 miles (146 km) east-southeast of Stroud and the Welsh border at Whitebrook, Monmouthshire, is 19 miles (31 km) to the west. Not part of the town itself, the civil parishes of Rodborough and Cainscross form part of Stroud's urban area.
Stroud acts as a centre for surrounding villages and market towns including Amberley, Bisley, Bussage, Chalford, Dursley, Eastcombe, Eastington, King's Stanley, Leonard Stanley, Minchinhampton, Nailsworth, Oakridge, Painswick, Randwick, Selsley, Sheepscombe, Slad, Stonehouse, Brimscombe & Thrupp, Whiteshill and Woodchester.[2][better source needed]
In March 2021 The Sunday Times named Stroud the best place to live in the UK, citing the town's abundance of green spaces, independent spirit, and school quality.
