Maximizing impact: the critical role of end-of-life usage
The global transition to a circular economy is changing how we view the end-of-life (EOL) of products. Whether in the energy transition, e-mobility, or the logistics supply chain, leading industries are discovering that discarded products do not constitute waste, but are rather valuable raw materials for a second life.
While sectors like the automotive and renewable energy industries are currently building new methods to reuse their materials, the wooden pallet sector has already embraced this principle as its absolute standard for decades.
End of life in other sectors: from EV batteries to urban mining
Rethinking the product lifecycle has rapidly become a strategic necessity across various top European sectors:
- Repurposing EV batteries for solar energy: Every year, thousands of electric vehicle batteries reach the end of their ‘first life’ on the road, even though they preserve 70% to 80% of their original storage capacity. These units can be repurposed as stationary battery energy storage systems serving commercial solar projects. This extends the total lifespan of the battery from 15 to 30 years, lowers investment costs for companies by 30%, and reduces the carbon footprint to a quarter of that of a newly produced battery.
- The European ‘urban mine’ for critical raw materials: Building renewable energy infrastructure requires vast amounts of raw materials; an onshore wind farm requires almost nine times more mineral resources than a traditional gas plant. Europe’s ‘urban mine’ (waste streams from wind turbines, end-of-life vehicles, and electronics) could yield between 4.1 and 5.7 million tons of critical raw materials annually by 2050. In a circular scenario, this could replace up to 56% of European primary import needs and generate a net climate benefit of 81 to 273 million tons of CO₂-equivalents per year.
Wooden pallets: an example of true end-of-life circularity
While the battery and wind turbine industries are fully developing their secondary markets, the wooden pallet has been circular by design for years.
Wooden pallets have an average lifespan of 7 years and maintain a 95% reuse and repair rate. When a pallet becomes damaged beyond repair, it does not become waste. At the end of its life cycle, the discarded wood can split into two high-value residual streams: wood chips for material applications and biofuels for energy recovery. Both end-of-life (EOL) aspects play a specific, measurable role in the circular economy.
The material route: wood chips for the woodworking industry
The first separate EOL stream focuses on material retention. Wood components that can no longer be used for repair are processed in industrial shredders. The result is standardized wood chips.
These wood chips serve as a secondary raw material for:
- The construction and furniture sectors: as a base material for the production of particle boards.
- The logistics sector: for manufacturing compressed chip block pallets.
Utilizing wood chips through this cascading principle ensures that the initial carbon storage in the wood is extended, while simultaneously decreasing the demand for new timber for particle board production.
The energy route: biofuels and the replacement of fossil fuels
The second, parallel EOL stream is dedicated to energy generation. Wood residues that are structurally unsuitable for wood chips are given a second life as biofuels.
This biomass is processed into high-quality wood pellets or used directly in industrial biomass power plants. In this energetic route, the discarded pallet wood generates green electricity and processes heat. The relevance of this is substantial: biofuels derived from pallets directly replace the consumption of fossil fuels like natural gas and coal, leading to a net reduction in greenhouse gas emissions.
The data: why biofuels from wooden pallets deliver climate gains
Life Cycle Assessment (LCA) studies make the impact of the biofuel route quantifiable. The data demonstrates that burning discarded pallets through energy recovery actively contributes to emission reductions:
- Energy output: research by Khan et al. (2021) shows that energy recovery from discarded wooden pallets generates 1,131 MJ of thermal heat and 264 MJ of electricity per 1,000 logistical trips.
- Avoided fossil emissions: because the generated biofuels replace fossil energy sources, a net total of 742 kg CO₂-equivalents is avoided in the atmosphere per 1,000 trips (Khan et al., 2021).
- Positive CO₂ credits per pallet: Carrano et al. (2014) demonstrate that using a wooden pallet for energy recovery results in a net climate credit of -18.3 to -19.3 kg CO₂-eq per individual pallet.
- Lower warming impact: compared to traditional industrial natural gas boilers, utilizing wood waste as biofuel lowers the Global Warming Potential (GWP) by 57% (Joshi et al., 2015; Puettmann & Lippke, 2013).
End-of-Life: wood versus synthetic materials
The division into wood chips and biofuels highlights the contrast between wooden pallets and plastic pallets.
The production of plastic pallets requires way more fossil energy (21,337 MJ compared to 3,809 MJ for wood). In the end-of-life phase, plastic lacks these two circular routes: damaged plastic cannot be converted into building materials (like wood chips) and holds no renewable bio-energetic value. Incinerating plastic pallets releases a net positive of fossil CO₂ (+937 kg CO₂-eq per 1,000 trips), whereas biofuels from wooden pallets generate negative emissions (-742 kg CO₂-eq) by offsetting fossil fuels in the market.
Summary
Whether it is repurposing EV batteries for solar energy, extracting rare metals from discarded wind turbines, or processing wooden pallets into wood chips and biofuels: the industry of the future revolves around maximizing value in the final phase.
At the end of its lifespan, a wooden pallet is not waste, but a raw material that can split into highly usable streams: for example wood chips for material applications and biofuels for green energy generation. By actively replacing fossil fuels, the wooden pallet ends its lifecycle not as waste, but as a structural and measurable source of green energy.
