An increasing number of biomethane producers, whether they bring gas-to-grid or produce bioCNG or bioLNG, want to have effective carbon dioxide (CO²) management to maximise yield and minimise environmental impact. Pentair has launched a compact enclosed skid CO² recovery system that can be connected to any existing biogas upgrading plant. Biogas produced through anaerobic digestion consists of roughly 55 per cent methane and 45 per cent CO². With conventional biogas upgrading techniques, the CO² by-product and with it a considerable amount of methane is expelled into the air and is lost. This means not only economic loss but also environmental damage. Pentair CO² recovery systems allow plant operators to recover the CO² from the biogas stream, which minimises the plant’s overall CO² footprint, and allows for a wider choice in feedstock. The recovered CO² can be used in a variety of applications including as gaseous fertiliser in greenhouses or for the production of dry ice. As the produced CO² complies with EIGA (European Industrial Gases Association) specifications, an additional option can be to sell the liquefied CO² to a third party. Pentair partners with a major industrial gas company and can assist plant operators in getting into contact. Some figures: For a CO² recovery system that is currently being implemented after an existing 2,000 Nm³ upgrader in Southern England, an estimated amount of 34 tons of liquefied CO² per day is planned to be sold to a gas company, which results in a significant additional revenue stream for the plant operator.

• Eliminating any methane slip

Pentair's technology even goes one step further. During the CO² recovery process, all impurities – including the ‘methane slip‘ that occurs with conventional biogas upgrading technologies are removed from the CO² and sent back to the biogas upgrading system.This results in significantly higher methane yield – for the above-mentioned project, an estimated 87,600 cubic metres per year which completely eliminates any methane slip. The portion of environmentally-harmful greenhouse gases released to the atmosphere is reduced to almost zero, which makes this technology a future-proof investment.

• Stand-alone unit in an enclosed housing

With capacities of up to 1,000kg/h, the compact enclosed skid CO² recovery system for biogas upgraders is delivered as a stand-alone unit. Built according to customer specifications, yet standardised to a high degree, delivery and start-up of the system can be accomplished in just 16 weeks. Through comprehensive lifecycle management including a global network of service engineers and an in-house CO² analysis service, Pentair ensures that the installation operates at optimal performance.

• 25+ references in biogas upgrading

By partnering with Pentair plant operators can be assured of receiving the best solution for their specific biogas upgrading project. Pentair provides a wide range of solutions for biogas upgrading and CO² recovery – from standard biogas upgrading systems with membrane technology at its heart to custom-made solutions combining biogas upgrading and CO² recovery to stand-alone CO² recovery units.Since entering the biogas upgrading market in 2010, Pentair has experienced amazing success with its innovative technology. To date, 25+ biogas upgrading projects have been realised in the Netherlands, Germany, France and the UK. Further projects are set to be completed in South Africa and the Philippines this year. [caption id="attachment_32083" align="alignright" width="300"] The team pictured at the Biogas Awards 2016, The VOX Birmingham ©Steve Pope Fotowales[/caption] On the 8th of July 2016, Pentair won the 2016 UK AD & Biogas Award, hosted by the Anaerobic Digestion and Biogas Association (ADBA), in the category of ‘Best Process Optimisation’ for its advanced biogas upgrading technology. Pictured in the images to the right at the awards ceremony are (l-r): Charlotte Smith, ADBA; Olaf Müller, Vice President Hygienic Process Solutions; Francois Huberts, Haffmans Sales Manager Biogas Systems; Ivan Williams, Commercial Director CO² & Biogas Systems; Ivan Rigney, Sales Director Food & Beverage Process Solutions UK, Ireland, Russia, & Eastern Europe; Jørgen Ballermann. Pentair plc delivers industry-leading products, services and solutions for its customers' diverse needs in water and other fluids, thermal management and equipment protection. With 2015 revenues of $6.4 billion, Pentair employs approximately 30,000 people worldwide. Pentair contact: Ivan Rigney Sales Director Food & Beverage Process Solutions UK • Ireland • Russia • Eastern Europe Phone: 01 206 3546 Email: ivan.rigney@pentair.com www.foodandbeverage.pentair.com