Biomethane News - CNG Services

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Didcot - UK's firstBtG ProjectThe first biomethane to grid project completed in theUK was created by CNG Services. At the ThamesWater Didcot sewage works site, anaerobic digestersare used as part of the sewage treatment process.Most of the biogas produced through this process wasflared as it had previously been uneconomic to usethis resource due to the high cost of connection to theelectricity grid.The Didcot project, sponsored by SGN, establishedthat BtG is possible and identified opportunities toreduce the capital and operating costs of the plantto make it easier for future biomethane injection projectsto go ahead. SGN provided ‘Innovation Funds’,designed to facilitate research and development inthe UK gas industry which enabled the project to goahead without the RHI premium.Biomethane NewsBefore - Gas being flaredBiogas produced at the site undergoes a clean-upand upgrading process using a water wash technologyprovided by Chesterfield Biogas. This removesmoisture, CO 2and H 2S to produce a clean, dry gascomposed of around 97% biomethane. Before the biomethanecan be injected into the grid, propane mustbe added so the calorific value of the biomethanematches that of the gas in the local SGN grid.The official launch event on October 5th marked thesuccessful completion of the project and showcasedthe first biomethane injected into the grid in the UK,with the gas purchased by British Gas.During construction“The Didcot project represents an important milestonefor the UK and the start of a new energymarket. SGN, Thames Water and Centrica deservecongratulations for the project and CNGServices looks forward to many similar projects inthe years to come.”John Baldwin, MD of CNG ServicesFor technical details on the Didcot project pleasecontact the project manager:iain.ward@cngservices.co.ukWhere is the gas grid?As part of our support to potential biomethaneprojects we have now obtained access to all gasGrid Network Maps owned by National Grid, Wales& West Utilities, Northern Gas Networks and ScotiaGas Networks (including Southern Gas Networks).With access to these maps we are now offering aservice to determine if there are any gas pipelinesin the areas for potential AD sites to enable gas injectioninto the grid. We will provide Satellite viewmaps, supported with the same image on a GasComplete - Gas being put to good useGrid Map, showing the closest connections andtype of pressure Gas Mains in the area of interest.Once connection points have been identified, we canprogress the query directly with the Grid owners forconfirmation of pipeline capacity to ensure your projecthas the opportunity to go down the biomethane route.For details please contact:angela.bagshaw@cngservices.co.uk
The Carbon Trustproject commissioned by The Carbon Trust andA aided by CNG Services compared the differentuses of biogas from AD in terms of carbon savingsand economics. It established that by 2020 the highestcarbon saving would result from biomethane asa transport fuel, closely followed by a biomethane togrid (BtG) scenario. The generation of electricity orCHP was found to result in much lower carbon savings.For biomethane to be used as a transport fuelor injected into the gas grid it is important for the gasto be cleaned and upgraded. This involves removingmoisture and impurities such as H 2S and NO Xfromthe biogas to produce clean, dry biomethane. CNGServices completed a technology and cost review forThe Carbon Trust in relation to biogas cleanup andupgradingBiomethane NewsAdnams BreweryOne of the projects in which CNG Serviceshas provided design and other consultancyrelates to the injection of gas into the service gridat the Adnams brewery, Southwold. Adnams BioEnergy, owned by Bio Group, alongside BritishGas and National Grid have delivered the UK’sfirst biomethane produced from brewery and foodwaste, to the gas grid.The project will generate up to 4.8 million kWhpa which would heat up to 235 homes for a yearor power a family sized car for 4 million miles. Inthe future it is hoped that enough gas will be producedto power both the Adnams brewery and itsfleet of lorries as well as injecting the remaining60% into the grid. The project uses an innovativecryogenic C0 2removal plant with the C0 2beingused to grow algae to make more biogas.In addition to reducing waste from the brewery itself,Adnams also provides an outlet for local foodwaste from both Waitrose and John Lewis, significantlyreducing waste sent to landfill. On top ofthis, other sources of renewable energy such asphotovoltaic cells and solar thermal panels havebeen incorporated into the site to further increasesustainability. Bio Group are now developingother similar projects across the UK.For details please contact:iain.ward@cngservices.co.ukTechnology VisitsIn the last 18 months CNG Services staff have completedtechnology reviews for a number of clientsincluding visits to operational biogas clean-up andupgrading plants across the EU, as follows:Sweden - Water Wash, Chemical wash, PSAAustria - MembraneSwitzerland - PSAGermany - Chemical Wash, Water Wash, PSAFrance - Water WashNetherlands - Chemical Wash, CryogenicIn each case we also visited the AD plants, includingone in Germany which was harvesting 'whole crop'silage (left) in July, ready to plant another crop the dayafter.If you are interested in the technical reports from thesevisits and our cost data base (which has capex andopex for different sized plants using the main clean upand upgrading technologies) then please contact:jen.clayton@cngservices.co.uk
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