Potato, Chocolate, and Cereals in Poundbury
“This is a waste product that would otherwise have been a problem to get rid of, but for us, now, we see it as a fuel.”
Richard Warneford, Wastewater Director
Poundbury was set up to be the most modern and self-sufficient city in the UK. Supported by Prince Charles, who opened it in 2012, this first commercial plant in Europe will be able to provide gas for up to 56,000 homes in the long term. Prince Charles hopes the Poundbury project will become the model that can be duplicated with the goal to provide a network of plants providing gas to local communities.
Feedstock: Biogas from agricultural products and food waste
Upgrading 650 Nm³/h
Product: Gas to grid injection
The plant uses a process known as anaerobic digestion to break down food waste from a nearby chocolate factory, a breakfast cereals producer and a potato processing plant, along with maize crops from local farmers. The biogas produced was not usable, until it was upgraded to renewable natural gas (RNG) by a biogas upgrading plant from DMT’s Carborex®MS. The methane goes to the pipeline, also referred to as gas grid, to provide energy for cooking and heating.
Poundbury was the first commercial plant in Europe, and the first biogas upgrading facility to work with membranes. In 2012, it was a new idea not to use chemicals or water. The first plant turned out to be easy to operate, has a small footprint, it has no high columns as other systems have.