Biogas plants for slaughterhouses and meat processing
Turn slaughterhouse and meat processing waste into renewable energy
Slaughterhouses and meat processors pay to remove animal by-products and face strict rules on how that material is treated before reuse. A biogas plant for slaughterhouse waste converts these streams into on-site electricity, heat or biomethane, cutting disposal costs while meeting animal by-product obligations. HoSt Group has delivered more than 450 renewable energy projects worldwide and has built numerous plants for slaughterhouse and animal by-product streams, including the Ecoson plant at Son in the Netherlands. For the underlying technology, see our organic waste biogas plants and anaerobic digestion pages.
Which slaughterhouse and meat processing waste streams suit anaerobic digestion?
Animal by-products, blood, paunch and FOGS: Category 2 and 3 animal by-products, paunch content, flotation sludge and fats, oils and greases (FOGS) all digest well and carry a high energy value. HoSt sizes the feeding and mixing system to keep the process stable despite the variable composition of abattoir waste.
Sanitation and thermal pressure hydrolysis: Animal by-products must be heat-treated before the digestate can be reused. HoSt includes sanitation within the plant scope, and for higher-risk category 2 material, HoSt ThermalTreat applies thermal pressure hydrolysis to meet the rules and improve conversion. Recovered heat preheats incoming feedstock.
What a slaughterhouse biogas plant delivers
- Electricity and heat for the site
Meat processing is heat and power intensive. Raw biogas can run a CHP unit that supplies the site directly, or be upgraded to biomethane for grid injection or transport fuel. - Lower animal by-product disposal costs
Digesting waste on site reduces the volume sent for external rendering or disposal, turning a standing cost into energy and recovered nutrients. - Digestate handling
HoSt separates digestate into a thick fraction for reuse and a thin fraction that can be further treated on site, matching local discharge and fertiliser rules.
Slaughterhouse biogas plant at Son
At Son in the Netherlands, HoSt built an industrial biogas plant that digests slaughterhouse waste, fluid food-industry waste and flotation sludge. A main digester and an after-digester with integrated gas storage give stable digestion at a short residence time under 15 days. The plant has a capacity of 65,000 tonnes a year and produces 2.5 MWe of electricity and heat. Digestate is separated into a thick fraction dried to 80% dry matter and a thin fraction treated on site before discharge. HoSt continues to provide service at the plant.
Frequently asked questions
Which slaughterhouse and meat-processing residues can be used?
Paunch content, blood, fats, animal by-products and process sludges are all digestible, and fat-rich streams such as FOGS give a high gas yield per tonne. The right combination depends on volumes and the animal by-product category involved. More Information.
Why do fats, oils and greases give such a high yield?
FOGS are energy-dense, so they produce considerably more biogas per tonne than watery streams. They need controlled dosing to keep digestion stable, which the feeding system manages automatically. That makes them a valuable co-substrate alongside lower-yield residues. More information.
What should be kept out of the digester?
Packaging, plastics, bone fragments and other inert material reduce yield and cause wear, so pre-treatment removes them before digestion. Cleaner input protects the plant and improves digestate quality. More information.
What can we produce from meat-processing waste?
The biogas becomes heat and power, grid biomethane, or transport fuel, while the digestate serves as a biofertiliser and the biogenic CO2 can be recovered as a food-grade product. One waste stream therefore supports several revenue lines. More information.