Biofuel, is any fuel that is derived from biomass—that is, plant or algae material or animal waste. Since such feedstock material can be replenished readily, biofuel is considered to be a source of renewable energy, unlike fossil fuels such as petroleum, coal, and natural gas.
Biofuel is commonly advocated as a cost-effective and environmentally benign alternative to petroleum and other fossil fuels, particularly within the context of rising petroleum prices and increased concern over the contributions made by fossil fuels to global warming.
Biodiesel is a renewable, biodegradable fuel manufactured domestically from vegetable oils, animal fats, or recycled restaurant grease.
Biodiesel is a liquid fuel often referred to as B100, pure, or neat biodiesel in its unblended form. Like petroleum diesel, biodiesel is used to fuel compressionignition engines.
Biodiesel is made through a chemical process called transesterification whereby the glycerin is separated from the fat or vegetable oil. The process leaves behind two products – methyl esters and glycerin. Methyl esters is the chemical name for biodiesel and glycerin is used in a variety of processes, including soap production.
Biogas is an environmentally-friendly, renewable energy source produced by the breakdown of organic matter such as food scraps and animal waste.
Biogas is a renewable fuel that’s produced when organic matter, such as food or animal waste is broken down by microorganisms in the absence of oxygen. This process is called anaerobic digestion. For this to take place, the waste material needs to be enclosed in an environment where there is no oxygen.
Biogas can occur naturally or as part of an industrial process to intentionally create it as a fuel.