Case Study

See How We
Helped
Andigestion

Cheltenham-based Andigestion is one of the UK’s largest gas-to-grid (G2G) anaerobic digestion (AD) facilities. Opened in November 2014, the site recycles more than 34,000 tonnes of food waste every year.

Collecting plate scrapings, leftovers and out-of-date produce from homes and businesses across Gloucestershire, Andigestion uses gas-to-grid (G2G) technology to purify methane generated in the AD process and upgrade it to reflect the properties of natural gas. By doing so, renewable energy can be sent directly to the national gas grid and used almost immediately in homes nationwide.

As part of initial site development plans, Andigestion’s owners made the decision to operate grid-free. Simply, this meant that no mains power (electricity or gas) would be used on site. Instead, the plant was to be completely self-sufficient – effectively repurposing the energy it created.

Andigestion therefore looked towards gas engine specification and maintenance expert – CooperÖstlund – to specify and install a 350 kW, 8-cylinder combined heat and power (CHP) engine. Working alongside G2G technology, this would convert a nominal percentage of the captured biogas into electricity, which would be used to power the site’s lighting, de-packaging plant, air compressors and water pumps, with all surplus electricity sold back to the National Grid.

Following Andigestion’s official opening in 2015, the site has continued to operate using self-generated renewable electricity and heat, while exporting surplus biomethane to the National Gas Grid. Furthermore, the facility is now one of the only AD sites in the country to boast ‘island mode’ – meaning that it can continue to operate even in the event of the National Grid going down.

Case Study

See How We
Helped
Andigestion

Cheltenham-based Andigestion is one of the UK’s largest gas-to-grid (G2G) anaerobic digestion (AD) facilities. Opened in November 2014, the site recycles more than 34,000 tonnes of food waste every year.

Collecting plate scrapings, leftovers and out-of-date produce from homes and businesses across Gloucestershire, Andigestion uses gas-to-grid (G2G) technology to purify methane generated in the AD process and upgrade it to reflect the properties of natural gas. By doing so, renewable energy can be sent directly to the national gas grid and used almost immediately in homes nationwide.

As part of initial site development plans, Andigestion’s owners made the decision to operate grid-free. Simply, this meant that no mains power (electricity or gas) would be used on site. Instead, the plant was to be completely self-sufficient – effectively repurposing the energy it created.

Andigestion therefore looked towards gas engine specification and maintenance expert – CooperÖstlund – to specify and install a 350 kW, 8-cylinder combined heat and power (CHP) engine. Working alongside G2G technology, this would convert a nominal percentage of the captured biogas into electricity, which would be used to power the site’s lighting, de-packaging plant, air compressors and water pumps, with all surplus electricity sold back to the National Grid.

Following Andigestion’s official opening in 2015, the site has continued to operate using self-generated renewable electricity and heat, while exporting surplus biomethane to the National Gas Grid. Furthermore, the facility is now one of the only AD sites in the country to boast ‘island mode’ – meaning that it can continue to operate even in the event of the National Grid going down.

34,000
tonnes of recycled food waste

Upgraded methane is injected directly into the national gas grid

Jon Stait, operations manager at Andigestion, commented: “As one of the country’s most advanced AD facilities, our Bishops Cleeve site provides a sustainable waste management solution for homes and businesses across the Gloucestershire region. Operating entirely free of mains power, the site is as environmentally-friendly as it could be!

“However, this wouldn’t have been achievable without the assistance of CooperÖstlund, whose knowledge, expertise and creative thinking were a critical part of site development. The team delivered the perfect solution for our requirements
and we can’t thank them enough.”

CooperÖstlund now provides ongoing servicing and maintenance support for the Andigestion site, ensuring the CHP engine continues to operate throughout the day and night, generating a significant volume of renewable energy and minimising payback times.

For more information please contact CooperOstlund