Chicken litter to biogas


Great Ynys Farm will use poultry power to become more eco friendly and generate a new income stream as a renewable energy generator.

The Hereford farm, which has 125 acres of arable land and a 90,000 broiler chicken operation, will use anaerobic digestion (AD) to convert chicken litter into biogas for renewable electricity and heat generation.

The green electricity will power the poultry houses and AD system, with a 90% surplus sold to the National Grid, while the captured waste heat will provide warmth for the chicken houses – displacing costly fuel oil and propane gas. Generation is scheduled to begin on 1 August 2011.

The farm’s new green power company – called Ynergy Ltd – has contracted biogas generation experts ENER-G and biogas plant manufacturer PlanET Biogastechnik for project delivery. Ground works were carried out by local contractors JJ Stanley and concrete tank construction by the Yorkshire company Galglass. Triangle Ltd supplied the low voltage electrical panel.

The AD system will have capacity to process 700 tonnes of poultry litter and 1000 tonnes of cattle slurry, mixed with 3000 tonnes of maize silage per annum. Use of maize reduces nitrogen levels in the digestion process and prevents the build up of high concentrations of ammonia that would arrest biogas production.

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