|Abstract Title:||Stable Isotopic Signature of Methane from Biogas Sources in the UK and Netherlands|
|Presenter Name:||Ms Semra Bakkaloglu|
|Company/Organisation:||Royal Holloway University of London|
Abstract Information :
Semra Bakkaloglu1, Rebecca Fisher1, Dave Lowry1, Euan Nisbet1 and Huilin Chen2 1Earth Science, Royal Holloway University of London 2Centre for Isotope Research, Energy and Sustainability Research Institute, Groningen, The Netherlands CH4 mole fraction is a major contributor to Europe's global warming impact and methane mole fraction is not well quantified yet in major source regions. There are significant discrepancies between official inventories of emissions and estimates derived from direct atmospheric measurement. Effective emission reduction can only be achieved if sources are properly quantified, and mitigation efforts are verified. Stable isotope analysis is widely used to characterise sources. Methane from biogas plants is biogenic origin and can vary with waste feed type, temperature and production process, which results in variation of emissions with time of day and time of year. In addition, the sewage treatment plants and sugar beet factories produce biogas by combusting the sludge/ by-products and their emissions can also be identified by analysing the methane isotopic composition, as different source types are characterised clearly by distinct Î´13C signatures. We report Î´13C measurements for methane plumes emanating from 20 diverse biogas plants. Samples were collected during campaigns in 2018 and early 2019 in SE England and the Netherlands. The air samples were collected from anaerobic digesters of food waste, agricultural waste, sludge waste and sugar beet remaining pulp facilities. Even different waste feed type can cause distinct isotopic signatures, there is not a typical isotopic signature for each type of waste feed due to different production processes.