The Agrivert AD Process ➊ Local Authority and commercial food wastes are
➊
delivered to an enclosed reception building where solid waste is tipped into a bunker.
➋ Food waste and packaging are mechanically separated in a hammermill. The separated food waste is stored and de-gritted in a buffer tank and the packaging is collected in a skip.
➌ ➋
➌ Food waste is pasteurised at 70°C for one hour using renewable heat generated on-site.
➍ Pasteurised food waste is pumped to a primary
➍
digester, where organic matter starts to break down, producing biogas.
➑ ➒ ➓
➎ Digestate is transferred to the secondary digester where it continues to break down and generate biogas.
➏ Whole digestate is finally pumped to storage until required by farmers. Any residual biogas produced in a storage tank is collected.
➎
➐ Digestate is collected via tanker and used as an organic bio-fertiliser on local farmland.
➏
➑➒ Biogas produced during digestion (and storage) is burned in CHP units to generate heat and electricity. 8% of electricity is used to power the AD facility and rest is sold to the National Grid.
➓ Heat, generated as a by-product, is used to heat the pasteurisers and digesters. Waste/Digestate Biogas Electricity Heat
➐
Agrivert Ltd. The Stables, Radford Chipping Norton Oxfordshire OX7 4EB t:+44(0)1608 677 700 f:+44(0)1608 677 711 mail@agrivert.co.uk
www.agrivert.co.uk
ANAEROBIC DIGESTION
Agrivert provides source segregated food waste solutions