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Waste Wood Recycling & Shredding Solutions

Powerful industrial shredders for scrap and waste wood recycling
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Every year, around 10 million tons of waste wood are generated in Germany that need to be disposed of or recycled. This includes first and foremost waste from the construction and demolition industries, followed by industrial waste wood, so-called used wood from bulky waste and municipal waste – and, of course, packaging residues such as pallets or crates. After collection and sorting, there are two options: Recycle scrap wood and use it as a basis for the production of particleboard. Or use it thermally to generate energy/heat.

In both cases, WEIMA’s single- or multi-stage shredding technology is used to either coarsely crush the waste wood first or to reduce it to a homogeneous chip size. If required, we can also supply the appropriate conveying technology, including metal separation via magnet, or an entire heating system, or we will be happy to advise you.

Customer applications: Waste wood shredding with WEIMA

Practical examples of successful shredding with WEIMA shredders
Firewood waste shredding with a WEIMA WLK 2000 at Brennholzwerk Trier

In this video, we showcase the shredding of firewood production waste with the WEIMA WLK 2000 single-shaft shredder. Sustainability is key: The shredder is powered by solar energy and a combined heat and power plant (CHP), ensuring an eco-friendly production process.

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WOOD You Believe This Was a Barrel? WEIMA WL 4 barrel staves shredding

At Holzmanufaktur Alsenz, old wine barrels are given a second life and transformed into unique handcrafted furniture. The barrels are carefully dismantled, and the staves are carefully reworked – but not all can be used.
These rejected barrel staves, along with other wood offcuts, are shredded in a WEIMA WL 4 shredder.

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WEIMA WL 1500 shreds waste wood shredding for heating

A WEIMA WL 1500 single-shaft shredder shreds waste wood, old doors and windows and much more.

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WEIMA Shredder WL 20 shreds used wood stages ('The Voice' | The X-Factor | Britain's Got Talent')

The next time you watch The Voice, The X-Factor or Britain’s Got Talent, spare a thought for what happens to the set when the series comes to an end. Rather than let it simply sit in a studio until the next series is filmed, it is of course dismantled and taken away for storage. And sometimes they need to be recycled. That’s when a WEIMA shredders comes into play.

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Wood waste shredding at Appalachian Lumber with a WEIMA WLK 10 wood grinder

Appalachian Lumber is a family-owned business that was founded in 1982, and is located in the rolling foothills of the Blue Ridge Mountains in Wilkesboro, North Carolina.
Recently, the company added a WEIMA WLK 10 single-shaft shredder to their facility. It shreds various wood waste from the production of flooring. The wood chips are collected in a container.

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Pallets and waste wood shredding with a WEIMA WLK 1500 at Bropack, Germany

A WEIMA WLK 1500 single-shaft shredder shreds pallets and waste wood from the production at Bropack in Dornham, Germany.

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Want to tackle your waste problem? Request a customized shredding solution now.

WEIMA portfolio for shredding waste wood

The right machine for every material
WEIMA WLK 1500 yksiakselinen murskain
Single-shaft shredder
WLK Series

Machines in the WLK series are ideally equipped for a wide range of plastics tasks. The machine design is characterized in particular by its durability and robustness. Thanks to the conveyor belt cut-out, all machines can be seamlessly integrated into any production line. They also offer a wide range of options in terms of drive and cutting geometry.

WEIMA WLK 25
Single-shaft shredder
S7 series

With their extremely sturdy design and large rotor diameters of up to 700 mm, shredders from the S7 series offer almost unlimited application possibilities for shredding wood waste. They are up to any challenge and can be equipped with a high-torque hydraulic drive.

Breaker
Woodwolf

The woodwolf was specially developed for crushing large pallets and chipboard. The pre-shredder crushes and tears the fed material into approx. A4-sized pieces using an auger.

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Didi you know?
Statistically, this results in an annual quantity of 113 kilograms of waste wood per inhabitant in Germany.

Recycling waste wood

The most important facts at a glance
Puujäte ja kasa rikkoutuneita puukuormalavoja
What is waste wood? Origin and characteristics

Waste wood refers to used wood products as well as wood composites and materials such as packaging, furniture, construction and demolition wood. It does not include uncontaminated industrial waste wood (e.g. sawdust) or forest waste wood. Special cases are, for example, firewood or wood from hydraulic engineering. The Waste Wood Ordinance (AltholzV) regulates disposal, recycling and divides waste wood into four categories (A I-IV) according to its pollutant load. In addition, there is PCB waste wood with polychlorinated biphenyls. Priority is given to material recycling (e.g.
chipboard production) over energy recovery. WEIMA offers a suitable shredding solution for all waste wood classes, from A1 to A4.

Source:Abfallratgeber Bayern
Source:LUBW
Source:BMUV

Wood waste beside WEIMA shredder
Attention! Contaminants!

Waste wood is part of the circular economy and a valuable resource, but can contain harmful substances such as coatings, binding agents, paints or wood preservatives that make it difficult to recycle. The level of contamination depends on the product: railroad sleepers and electricity pylons are usually fully impregnated, while wood preservatives are applied to the surface for home
use. Varnishes and paints may contain heavy metals or plasticizers. Not all waste wood is contaminated – often only impurities such as metal staples, fittings, concrete, plaster or plastic are found, which are removed by shredding and subsequent separation.

Source:Abfallratgeber Bayern

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Energy recovery from waste wood

In Germany, 80 waste wood power plants use around 7.7 million tons of waste wood to generate around
million tons of waste wood annually to generate around 800 MW of energy (calorific value: 11,000-15,000 kJ/kg). Incineration is regulated by the Federal Immission Control Act (BImSchG): A l and A Il wood may be burned in small combustion plants up to 30 kW without a permit; contaminated wood requires special conditions. Despite the more environmentally friendly energy generation compared to primary sources, material use has priority in terms of cascade use.

Source:Abfallratgeber Bayern
Source:LUBW
Source:BMUV

Erikokoisia lastulevyjä päällekkäin
Material recycling of waste wood | Used wood becomes a new product

For material or energy recycling, waste wood is first shredded to a uniform chip size using shredders. This is crucial for the quality of chipboard. In Germany, an average chipboard consists of around a third of category A l and A lI waste wood, in compliance with legal limits for harmful substances. In Italy, the proportion is up to 90%, in Denmark 61%. Its use in OSB or MDF boards has been rare to date.

Source:Umweltbundesamt
Source:LUBW

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Wood pallets shredding with WEIMA

Learn more about shredding pallets with WEIMA shredders here:

Free material tests in the WEIMA technical center
See for yourself. Have your material tested free of charge in our showroom.

Frequently Asked Questions about waste wood shredding

Everything you need to know about safely and efficiently shredding waste wood.

WEIMA shredders can process a wide range of waste wood, including pallets, construction timber, furniture waste, crates, offcuts, OSB and MDF panels, windows, doors, and mixed industrial wood residues. Both softwood and hardwood — treated or untreated — can be reduced reliably. Even bulky, irregular, or high-volume wood streams are handled efficiently with the right machine configuration.

The workflow follows a straightforward sequence: collect and sort wood waste, feed it into the shredder, reduce it to uniform chips, and optionally separate contaminants such as metals or oversized pieces. The shredded wood can then be used as biomass fuel, as raw material for chipboard or panel production, for composting or mulching, or for volume reduction prior to transport. Each line can be tailored to your layout, throughput, and downstream processing requirements.

WEIMA offers several machine series for wood applications, including WL single-shaft shredders for industrial wood waste, horizontal WLH models for long materials, and heavy-duty units from the W5, WLK, or S7 series for high-volume or demanding operations. The right choice depends on incoming material size, contamination level, desired chip quality, and throughput. Smaller facilities benefit from compact WL machines, while large recyclers or biomass processors often choose high-capacity models.

The shredder produces uniform wood chips suitable for a wide range of applications. These chips can be burned in biomass boilers, used as input for particleboard production, processed into mulch, or utilized as a secondary raw material. Uniform particle size also improves storage, conveying, and handling across the value chain. Many users replace costly disposal with profitable reuse of shredded wood.

Yes. WEIMA shredders are built to handle wood containing nails, screws, metal fittings, coatings, or paint. Pre-sorting is still recommended to reduce wear and improve overall product quality. For heavily contaminated material, the shredded chips are often used for energy recovery rather than for material recycling. Wear protection options ensure long-term reliability even under abrasive conditions.

Shredding significantly reduces volume, making storage and transport more efficient. It turns wood waste into a valuable secondary resource and supports circular economy practices. Companies save disposal costs, achieve cleaner material streams, and gain flexibility in how wood waste is reused. Reduced logistics effort and improved downstream processing make shredding a cost-effective solution for many industries.

WEIMA shredders are engineered for industrial environments with heavy steel construction, wear-protected cutting chambers, and efficient rotor designs. Regular inspections of knives, screens, and the cutting chamber help maintain consistent chip quality. Maintenance routines are simple due to easy access, modular design, and readily available wear parts. With proper service, the machines operate reliably in continuous or multi-shift applications.

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