Climate action plan(+): energy self-sufficient landfill gas treatment with heat recovery and climate neutral internal powered supply by the example of the landfill Bengelbruck, Germany

摘要

Climate protection is becoming more and more important for landfills at after-closure phase. Being the main component of landfill gas, methane is 28 times more climate-damaging than carbon dioxide. In the field of conventional venting, the main focus was so far on the extraction at highest possible methane concentrations. This is getting more and more difficult depending on the age of the landfill. It is common practice to respond with a reduction of the extraction amount, resulting in a diminishing performance of the venting system and increasing landfill gas emissions. In terms of climate protection a future orientated new concept of venting landfill gas was implemented at the landfill Bengelbruck. The aerobisation and in-situ stabilization of the landfill is effected by using a special process. The emission reduction at standard operation conditions is currently approx. 15 t CO2 Eq/day. The operated system technology consists of an Regenerative Thermal Oxidation (RTO) with heat recovery for lean gas treatment and two Stirling engines for the energy self-sufficient and climate-neutral power self supply by means of landfill gas.