In 2014 we commissioned an anaerobic digestion (AD) plant, in a joint venture with an AD business now known as Enrich (enrich4.com). Enrich now have 6 ADs across the country. They use around 500,000 tonnes of food waste, sourced from right across England. Our plant is fuelled using food waste collected from a 100 mile radius of Codford. The plant takes 100,000t of waste and coverts it into 3.7mw of electricity through three Jenbacher CHPs, (enough for 3,700 homes or 11,000 people), which is sold into the grid. The farm takes the digestate (the inert, digested waste) from the AD, which is stored in lagoons and spread as a fertiliser onto our growing arable crops.
We are finding new uses for the spare heat generated by our CHPs, with a 3ha (8 acre) glass house planned for horticultural use which will be powered by spare heat, carbon dioxide, and electricity from the AD. We have also installed one of the first ORC units in the UK – this uses exhaust gas heat to generate a further 150kw of renewable electricity. Together with this, the East Farm commercial units are powered using electricity straight from the plant.
We are now looking to expand further, adding a new digester to take output up to 4.5mw. This will be utilised through a 4th CHP and a liquid gas offtake
During 2013 we developed a 10 hectare (25 acre) field of photo voltaic panels. This can produce up to 6.5mw of power. The site is screened from view by existing woodland, and by a wild flower rich chalk screening bund.
In February 2016 we added a further 8 ha (20 acres) that can produce 5mw, situated next to the original field.
During 2019, we have secured planning permission on a further 30 ha of land next to these two sites, and we have secured a new 12.5mw grid connection. We will develop around 20 ha of this, with the remaining 10 hectares set aside for wild flowers and ponds to preserve an ancient village that our archaeological investigations discovered under the site.
In February 2012 we installed 3 roof mounted PV arrays on our farm buildings. Our old dairy building has a 30kw array which will supply much of power requirement for Zoo Events, our new tenant on site, with the balanced exported to the grid. One of the grain stores at Codford has a 50kw array, and the Castle Barn grain store at Ballington has a 70kw array; these supply around 15% of the power requirements for the grain stores.
In January 2013 we installed a 100kw woodchip boiler into the buildings complex at Manor Farm, Stockton. This provides heat to all the buildings in the area, including two houses. It runs on chip that is sourced from our forestry, which is processed and stored by our farming neighbour.
45 acre field solar PV
Arial view of solar PV
Arial view of AD plant
Food waste for separation
CHP and gas storage tank
Potential Glass House
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