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Wood Chips Trading – TRADERSbiomass

State-of-art online trading platform of biomass.

Wood Chips Trading

Woodchips are small to medium sized pieces of wood formed by cutting or chipping larger pieces of wood such as trees, branches, logging residues, stumps, roots, and wood residue.

Woodchips may be used as a biomass solid fuel and are raw material for producing wood pulp. They may also be used as an organic mulch in gardening, landscaping, restoration ecology, bioreactors for denitrification and as a substrate for mushroom cultivation.


Our platform covers the trading of the world’s most common standards (including ISO) & non-standard wood chips products.

Technical Specification of standard Wood Chips

*Exact technical specification of Non-standard Wood Chips products can be inserted in the Electronic Trading System and published by the suppliers.

Table 1 – Particle size of wood chips

*All Dimensions are in mm

  Minimum 60 w-% in main fraction, mma Fines fraction, w-% (< 3,15 mm) Coarse fraction, (w-%), max. length of particle (mm), max. cross sectional area (cm2)
P16 small 3,15 ≤ P ≤ 16 mm ≤ 12% ≤ 3 % > 31,5 mm, and all < 45 mm, The cross sectional area of the oversized particles < 1 cm2
P31 medium 3,15 ≤ P ≤ 31,5 mm ≤ 8% ≤ 6 % > 45 mm, ≤ 3 % > 100 mm and all < 200 mm, The cross sectional area of the oversized particles < 5 cm2
P45 large 3,15 ≤ P ≤ 45 mm ≤ 8% ≤ 12 % > 63 mm and all < 300 mm, The cross sectional area of the oversized particles < 10 cm2

aThe numerical values (P-class) for dimension refer to the particle sizes passing through the mentioned round hole sieve size (ISO 17827-1).

  

Origin & Source
A1 A2 B1 B2 Analysis Method
1.1.1 Whole trees without roots a 1.1.1 Whole trees without roots a 1.1 Forest plantation & other virgin woodb 1.1 Forest, plantation and other virgin woodb ISO 17225-1
1.1.3 Stemwood 1.1.3 Stemwood 1.2.1 Chemically untreated wood residues 1.2. By-products and residues from wood processing industry
1.1.4.3 Logging residues, stored broadleaf 1.1.4.3 Logging residues, stored broadleaf   1.3.Used wood
1.2.1 Chemically untreated wood residues 1.2.1 Chemically untreated wood residues    

  

Physical Parameter
  Unit A1 A2 B1 B2 Analysis Method
Particle size, P mm To be selected from Table 1 To be selected from Table 1 To be selected from Table 1 To be selected from Table 1 ISO 17831-1
Moisture, Mc w-% M10 ≤ 10, M25 ≤ 25 M35 ≤ 35 To be specified To be specified ISO 18134-1, ISO 18134-2
Ash, A Dry Basis, w-% A1.0 ≤ 1,0 A1.5 ≤ 1,5 A3.0 ≤ 3,0 A3.0 ≤ 3,0 ISO 18122
Net Calorific Value, Q MJ/kg or kWh/kg Q13.0 ≥ 13,0 or Q3.6 ≥ 3,6 Q11.0 ≥ 11,0 or Q3.1 ≥ 3,1 To be specified To be specified ISO 18125
Bulk Density, BD d As received, kg/loose m3 BD150 ≥ 150 or BD200 ≥ 200 BD150 ≥ 150 or BD200 ≥ 200 To be specified To be specified ISO 17828

  

Elementary Composition
  Unit A1 A2 B1 B2 Analysis Method
Nitrogen, N Dry Basis, w-% Not applicable Not applicable N1.0 < 1,0 N1.0 < 1,0 ISO 16948
Sulphur, S Dry Basis, w-% Not applicable Not applicable S0.1 < 0,1 S0.1 < 0,1 ISO 16994
Chlorine, Cl Dry Basis, w-% Not applicable Not applicable Cl0.05 < 0,05 Cl0.05 < 0,05 ISO 16994
Arsenic, As Dry Basis, mg/kg Not applicable Not applicable ≤ 1 ≤ 1 ISO 16968
Cadmium, Cd Dry Basis, mg/kg Not applicable Not applicable ≤ 2,0 ≤ 2,0 ISO 16968
Chromium, Cr Dry Basis, mg/kg Not applicable Not applicable ≤ 10 ≤ 10 ISO 16968
Copper, Cu Dry Basis, mg/kg Not applicable Not applicable ≤ 10 ≤ 10 ISO 16968
Lead, Pb Dry Basis, mg/kg Not applicable Not applicable ≤ 10 ≤ 10 ISO 16968
Mercury, Hg Dry Basis, mg/kg Not applicable Not applicable ≤ 0,1 ≤ 0,1 ISO 16994
Nickel, Ni Dry Basis, mg/kg Not applicable Not applicable ≤10 ≤10 ISO 16968
Zinc, Zn mg/kg Not applicable Not applicable ≤100 ≤100 ISO 16968

a Excluding class 1.1.1.3 Short rotation coppice, if reason to suspect contamination of land or if planting has been used for the sequestration of chemicals or growing trees have fertilized by sewage sludge (issued from waste water treatment or chemical process).

b Excluding classes 1.1.5 Stumps/roots and 1.1.6 Bark

c Actual property class for moisture content to be stated. Moisture class M10 is for artificial dried wood chips. Minimum value of moisture content to be stated.

d Actual property class for Bulk density to be stated. The bulk density is lower for coniferous than for broadleaf wood, see informative Annex A.

 



General guidelines for bulk density of graded wood chips

*The bulk density range is given for two general classes of tree species: broadleaf and coniferous species.

- Coniferous species contain most of the softwood species (e.g. pine, spruce, fir) as well as the light broadleaf species like poplar and willow. As a basis for the calculation a basic density of 400 kg dry matter/m3 is assumed. Basic density is the ratio of the mass on dry basis and the solid volume on green basis (ISO 16559).
- Broadleaf species comprise most of the hardwood species like oak, beech, maple, birch. For the broadleaf species a basic density of 550 kg dry matter/m3 is assumed.

In the table, a range of bulk densities is given, which depend on the moisture content of the chip.

Moisture content on wet basis w-% 8 to 18 18 to 25 25 to 35 35 to 45
Bulk density for coniferous species kg/m3 loose volume 160 to 180 180 to 200 200 to 225 225 to 270
Bulk density for coniferous species Property class BD150 BD150 BD200 BD200
Bulk density for broadleaf species kg/m3 loose volume 225 to 250 250 to 280 280 to 320 320 to 380
Bulk density for broadleaf species Property class BD200 BD250 BD250 BD300

NOTE : 1 solid m3 is on average from 2,5 to 3,0 loose m3 of wood chips.

  

*Exact technical specification of Non-standard Wood Chips products can be inserted in the Electronic Trading System and published by the suppliers.

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