Wood waste is one of the largest recyclable waste streams in Canada and the United States. Sawmills, pallet manufacturers, construction sites, demolition contractors, and municipalities generate millions of tons of wood waste annually. Most of it can be shredded and converted into valuable products:
- Biomass fuel (wood chips for boilers and power plants) - Animal bedding - Mulch and landscaping material - Particle board and MDF feedstock - Compost bulking agent
The right shredder turns a waste disposal cost into a revenue stream.
Clean wood (pallets, offcuts, sawmill slabs): Easy to shred. Low wear on blades. Any shredder type works well. Main concern is throughput and output size consistency.
Nailed pallets and crates: Nails and fasteners accelerate blade wear but do not damage a properly built industrial shredder. A magnetic separator after the shredder removes ferrous metals from the output.
Demolition and C&D wood: May contain concrete, drywall, metal brackets, screws, and paint. Requires a robust double-shaft shredder for primary processing. Magnetic and air separation needed downstream.
Stumps and root balls: Dense, irregular, often dirt-contaminated. Requires high-torque double-shaft shredder with wide cutting chamber. Extremely abrasive — budget for higher blade wear.
Biomass (straw, corn stalks, branches): Light, fibrous material that can wrap around shafts. Anti-wrap cutter design is essential. Single-shaft with screen or hammer mill produces good biomass chips.
Single-Shaft Shredder: Best for clean wood, pallets, and applications requiring controlled output size. The sizing screen ensures consistent chip dimensions. Hydraulic pusher handles irregular pieces. Capacity: 2-30 TPH. Starting at $18,500 USD.
Double-Shaft Shredder: Best for demolition wood, stumps, mixed C&D waste, and any wood with metal contaminants. High torque handles nails and fasteners without stalling. Capacity: 3-40 TPH. Starting at $25,000 USD.
Hammer Mill: Best for secondary size reduction of pre-shredded wood into fine chips or biomass fuel. High-speed impact design produces uniform chip size. Ideal after a primary shredder. Capacity: 5-50 TPH. Starting at $15,000 USD.
Two-Stage System (Shredder + Hammer Mill): The optimal setup for producing high-quality biomass fuel or mulch. Primary shredder reduces raw wood to rough chips, hammer mill produces final sizing. Add a magnetic separator between stages for nail removal.
Different end products require different chip sizes:
- Biomass fuel (industrial boilers): 30-80mm chips. Use a single-shaft shredder with 50-80mm screen or a hammer mill. - Biomass fuel (residential pellet feedstock): 5-15mm chips. Requires hammer mill with fine screen. - Mulch and landscaping: 50-150mm irregular pieces. Single-shaft with coarse screen or double-shaft primary shredding. - Animal bedding: 10-30mm chips. Hammer mill or single-shaft with fine screen. - Particle board feedstock: 2-8mm chips. Hammer mill with precision screening. - Compost bulking agent: 25-75mm chips. Single-shaft or double-shaft primary shredding.
Nailed pallets and construction wood always contain ferrous metal. Here is the recommended approach:
1. Do NOT try to remove nails before shredding — it is impractical and unnecessary. 2. Shred the wood with nails in it. Industrial shredder blades (D2 tool steel, HRC 58-62) are designed to cut through nails and light fasteners. 3. Install an overband magnetic separator or magnetic drum after the shredder to pull ferrous metals from the output stream. 4. Budget for 20-30% faster blade wear compared to clean wood.
This approach is standard practice in the wood recycling industry worldwide. The recovered metal has scrap value that partially offsets the higher blade wear cost.
Pallet recycling startup (5-10 TPH): SS-600 single-shaft shredder + overband magnet. Total investment around $25,000 USD. Produces mulch or biomass chips.
Medium wood recycling operation (10-25 TPH): DS-1200 double-shaft primary shredder + HM-1000 hammer mill + magnetic separator + screening. Produces graded biomass chips. Total investment $60,000-90,000 USD.
Large C&D wood processing (20-50 TPH): DS-1600 double-shaft primary + SS-1400 single-shaft secondary + HM-1200 hammer mill + magnetic and air separation + screening and conveying. Produces clean, graded chips from contaminated demolition wood. Total investment $120,000-200,000 USD.
Contact Starglow Shredder for a custom configuration matched to your wood waste stream and output requirements.
| Shredder Type | Best For | Output Size | Capacity | Starting Price (USD) |
|---|---|---|---|---|
| Single-shaft | Clean wood, pallets, plastics | Controlled (screen-based) | 2-30 TPH | $18,500 |
| Double-shaft | Demolition wood, stumps, C&D | Rough (cutter-based) | 3-40 TPH | $25,000 |
| Hammer mill | Fine chips, biomass fuel | Fine and uniform | 5-50 TPH | $15,000 |
| Two-stage system | High-quality biomass, mulch | Precise final sizing | 5-25 TPH | $40,000+ |