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Wood Ash Database

– Wood for Energy -

Element concentrations in ash


Filter by burner:
Unknown (281)
CFB (50)
Powder FBC (3)
Grate boiler (231)
Powder burner (5)
Spreader-stoker (1)
BFB (30)
Filter by ashtype:
Unknown (217)
Fly ash (186)
Bottom ash (162)
Mixed fly/bottom (34)
Cyclone ash (2)
Filter by fuel type:
Unknown (257)
Wood (292)
Bark (32)
Peat (9)
Wood pellet (3)
Birch (4)
Chip (2)
Wood and bark (2)


ElementMean95% conf. Median# Samples
Al 27.43 ± 2.53   22.00 g/kg 433
C 156.14 ± 35.62   75.00 g/kg 111
Ca 163.07 ± 7.29   160.00 g/kg 526
Cl 4.98 ± 3.70   2.00 g/kg 41
Fe 21.73 ± 2.99   13.75 g/kg 480
K 48.39 ± 2.49   47.40 g/kg 534
LOI 123.57 ± 23.60   80.00 g/kg 128
Mg 18.45 ± 0.92   17.00 g/kg 510
Mn 10.09 ± 0.70   8.20 g/kg 551
Na 10.56 ± 0.96   9.11 g/kg 434
Not Burned 146.98 ± 25.69   63.50 g/kg 208
P 10.81 ± 0.53   9.60 g/kg 495
S 10.98 ± 1.82   4.80 g/kg 311
Si 134.50 ± 10.18   128.95 g/kg 355
Ti 2.11 ± 0.41   1.20 g/kg 334
TOC 197.44 ± 81.37   177.00 g/kg 17
As 23.66 ± 6.24   7.98 mg/kg 558
B 207.52 ± 14.52   190.00 mg/kg 411
Ba 2040.66 ± 138.44   1900.00 mg/kg 436
Be 1.24 ± 0.10   1.25 mg/kg 347
Cd 12.72 ± 1.24   8.40 mg/kg 619
Co 11.47 ± 0.49   10.20 mg/kg 543
Cr 101.08 ± 12.16   66.40 mg/kg 567
Cu 127.89 ± 7.66   101.00 mg/kg 659
EC 7396.67 ± 475.50   7340.00 mg/kg 3
F 25.35 ± 10.66   17.00 mg/kg 16
Fe3+ 8533.00 ± 173.90   8533.00 mg/kg 3
H 10190.41 ± 3569.05   2000.00 mg/kg 122
Hg 0.46 ± 0.23   0.11 mg/kg 549
La 18.94 ± 3.38   12.85 mg/kg 146
Mo 6.73 ± 0.79   5.00 mg/kg 427
N 2205.43 ± 644.64   1000.00 mg/kg 151
Nb 7.71 ± 0.64   7.15 mg/kg 145
Ni 44.88 ± 4.39   33.00 mg/kg 563
N-NH4 182.22 ± 127.11   100.00 mg/kg 9
No 24.50 ± 6.35   24.50 mg/kg 2
N-tot 2022.22 ± 1189.43   1700.00 mg/kg 9
Pb 131.14 ± 36.76   54.00 mg/kg 607
pH 13.33 ± 0.38   13.30 mg/kg 3
P-tot 14777.78 ± 4188.67   15000.00 mg/kg 9
Sb 3.44 ± 0.88   1.30 mg/kg 187
Sc 4.97 ± 0.72   3.73 mg/kg 146
Se 4.13 ± 1.42   5.00 mg/kg 6
Sn 10.57 ± 1.07   6.60 mg/kg 349
Sr 665.34 ± 30.86   665.00 mg/kg 165
TIC 20714.29 ± 4426.37   20000.00 mg/kg 7
Tl 2.18 ± 2.16   2.60 mg/kg 4
V 34.99 ± 5.04   27.00 mg/kg 534
W 47.99 ± 5.92   52.50 mg/kg 129
Y 17.42 ± 3.35   10.50 mg/kg 135
Yb 0.60 ± 0.04   0.61 mg/kg 3
Zn 2415.28 ± 246.78   1438.50 mg/kg 656
Zr 94.20 ± 9.11   93.95 mg/kg 130