North Wales farm receives UK’s first RHI payment

A farm in North Wales, which is home to the original “fre-energy” Anaerobic Digester, is the first in the UK to receive its payment of the Renewable Heat Incentive from the Government.

Lodge Farm, located on the outskirts of Wrexham, North Wales, comprises 1100 acres given over, on a fully organic basis, to a herd of 650 dairy cattle and has been running its AD plant for over 4 years.

The fre-energy Digester generates a reliable and constant production of energy 24 hours a day, 365 days a year, with a generation capacity of 160kw of electricity and 200kw of heat. In addition to the energy used for the AD process, around one fifth of the electricity and 50kw of heat are used on site to power the farm, on-site engineering business and fre-energy office.

Surplus electricity is exported to the National Grid (sufficient to supply around 80 houses) and is eligible for the Feed in Tariff (FiTs). As some of the energy is utilised as heat it is also eligible to receive income under the Renewable Heat Incentive (RHI) that pays a fixed fee for every kilowatt of heat produced. The payment is effectively to reward using alternative renewable energy sources to fossil fuels.

Lodge Farm’s plant, which comprises a digester with capacity to process 33 tonnes of farm slurry each day, is unique in being able to continually process grit-laden waste materials. Unlike AD plants in mainland Europe, there is no requirement for the fre-energy system to be regularly shut down whilst the digester tank has to be emptied. Consequently, Lodge Farm has been able to avoid having to allocate valuable land, which is best served to sustaining the farm’s core dairy business, on which to grow crops as feedstock for the plant.

Continuity of energy supply and, therefore, RHI and FiT income generation, is also assured by the ability of the plant to process high strength feed-stocks, such as chicken litter and food waste. These feed-stocks have the potential to create foam which, if it enters the gas output pipes, can irreversibly damage the VCHP engine and compromise the AD process. The system at Lodge Farm allows the foam to be removed from the gas space without the need to reduce the digestate level in the tank.

Richard Tomlinson, fifth generation family farmer at Lodge Farm and managing director of fre-energy, said: “We have developed unique technology, for which worldwide patents have been granted, to enable farms to process their animal slurry, which would otherwise have to be disposed of. Although AD plants are in use on thousands of farms elsewhere in Europe, none of these plants have been designed to deal with the problems associated with processing animal waste and many are therefore beginning to fail. As farmers ourselves, we have invented technology that is proven to work on farms and have to date installed plants at 3 further farms in the UK.”