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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.
Small-scale biogas plants are being utilized in many countries, including Ghana, [55] Vietnam [56] and many others. [57] Larger centralized systems are being planned that mix animal and human feces to produce biogas. [52] Biogas is also produced during sewage sludge treatment processes with anaerobic digestion.
Renewable natural gas (RNG), also known as biomethane, is a renewable fuel and biogas which has been upgraded to a quality similar to fossil natural gas and has a methane concentration of 90% or greater. [1]
Bioenergy is a type of renewable energy that is derived from plants and animal waste. [1] The biomass that is used as input materials consists of recently living (but now dead) organisms, mainly plants. [2]
HILBERT — A new biogas plant came online in August in the town of Hilbert. Saturn Renewables LLC, a company created as a partnership between Archaea Energy and GFL Environmental opened its first ...
Biogas captured from biodegradable green waste can be used as biofuel. Green waste can be composed of non-food crops , which decompose to produce cellulosic ethanol . It can also help reduce the necessity of petroleum gases, which produce large amounts of greenhouse gases , such as carbon dioxide , when burned.
Anaerobic digestion produces two main products: digestate and biogas. Digestate is produced both by acidogenesis and methanogenesis and each has different characteristics. These characteristics stem from the original feedstock source as well as the processes themselves.
Human feces can in principle also be dried and used as a fuel source if they are collected in a type of dry toilet, for example an incinerating toilet.Since 2011, the Bill & Melinda Gates Foundation is supporting the development of such toilets as part of their "Reinvent the Toilet Challenge" to promote safer, more effective ways to treat human excreta. [3]