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You are here: Home > Planning and Environment > Waste and Recycling

Anaerobic digestion - GwyriAD project

The construction of the GwyriAD anaerobic digestion plant is now complete and the site is fully operational. The plant will treat all of the food waste collected by Gwynedd Council and will generate 3,500 megawatt hours per year of renewable electricity for the national grid. This is enough to meet the annual demand of more than 700 homes, which is approximately equivalent to the number of households in Penygroes.

Anaerobic digestion is a biological process that happens naturally when bacteria break down organic material in a closed oxygen free environment. The process produces methane-rich biogas which is captures and used as fuel to generate renewable electricity and heat.

Bio-fertilizer is the only waste that is produced during the process. This liquid is high in nutrients an can be used as a fertilizer on crops. The liquid is pumped into covered storage tanks on the site and can be applied onto local farmland at certain times of the year.

This new site will reduce the need to dispose of food waste in landfill sites and will help Gwynedd Council meet our recycling targets and avoid substantial fines for failing to meet these targets.


GwyriAD Project - November 2013 newsletterpdf (pdf, 700k)

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Last updated: 05/12/2013
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