Organic residues & manure biogas plant, UK
Biomethane production
At Charlton Park Estate near Malmesbury, Wiltshire, HoSt delivered a turnkey organic residues and manure biogas plant that has produced grid quality biomethane for more than five years. The facility pairs anaerobic digestion with membrane biogas upgrading to turn agricultural and food residues into renewable gas for the UK grid.
Charlton Park Biogas
The plant converts 47,500 tonnes of organic residues each year, including broiler manure, maize silage, rye silage, waste grass and food waste, into renewable biomethane. In two 5,160 m³ digesters, anaerobic digestion breaks down the feedstock to produce biogas. HoSt’s membrane biogas upgrading then separates the CO2 to deliver biomethane at grid quality.
The biomethane is injected into the national gas grid and supplies the equivalent of over 3,800 average households with a renewable alternative to fossil natural gas. Heat recovered after pasteurisation warms the digesters and feedstock, and the remaining digestate is processed into bio fertiliser for use across the estate. The result is a closed loop: the estate’s own crops and residues become the fuel, and the nutrients return to its land.
Technical highlights
Project characteristics
- Turnkey supply with a full EPC contract
- Heat is recovered after pasteurization
- Double insulated membrane roofs
- Digestate is converted into bio-fertilizer and applied on the land of the estate
