Original: Biogas is often combusted where it is produced, such as a  landfill or wastewater treatment plant, with a reciprocating engine or a microturbine, which is a small gas turbine.
Simplified: Biogas is often combusted where it is produced, such as a landfill or wastewater treatment plant, with a reciprocating engine or a microturbine, which is a small gas turbine.