RAPTOR™ =  RAPid Transformation of Organic Residues

A compact multistep process (pretreatment followed by methanisation) transforming food & agricultural residues into biogas.

It is an advanced and powerful liquid state anaerobic digestion process that converts almost any organic residue (waste) or energy crop (“substrate”) into biogas, valuable electricity or heat. A RAPTOR™ plant is a total solution starting with logistics for substrate intake and handling, and ending with production of biogas, green electricity or steam. The process consists of an enhanced pre-treatment followed by multi-step biological fermentation.
The detailed design of RAPTOR™ systems is always adapted to the specific needs imposed by the three major application sectors: industrial (i-RAPTOR™), agricultural and municipal.

• Food waste:
• Market surplus
• Kitchen waste
• Off spec fruit & vegetables
• Excess harvest
• Agro-industry residues:
• Beet pulp
• Tapioca pulp
• Vegetable/potato waste
• Industrial residues:
• Brewery waste (spent grain)
• Fruit processing waste
• Paper mill sludge
• Energy Crops:
• Corn (silage)
• Various grasses
• Algae

TYPICAL GWE RAPTOR™ PROCESS - for optimized digestion and maximum green power


The biogas generated in the RAPTOR™ process is desulphurised and partially dried, using GWE’s (BIO) SULFURIX™ and GASODRIX™ systems, and consequently used in a CHP unit (Combined Heat and Power) for green power generation. Government aid under the form of grants, soft loans or regulated minimum prices for green power sold to the public grid often make green power generation an economically attractive application for biogas. Alternatively it can be used in a steam boiler for steam production, in which case desulphurization and drying is typically not needed.