Table 3 Collected data for nine different types of wood chips: type of study performed, carbon content, TOC leaching, influent and effluent nitrogen concentrations, and nitrogen removal

Softwood

Pine

Column

47

100

3

1.56

48

[91]^a

Pine

Column

–

–

15.8

11.1

30

[18]

Pine

Column

28

158

50

<2.0

96

[70]

Pine

Column

28

175.3

50

17.7

65

[70]

Pine

Column

50

–

26

1.8

93

[19]

Pine

Batch

47

–

57.8

6.4

89

[75]

Coniferous

Batch

44

–

32.2

1.6

95

[70]

Willow

Batch

47

120

32.2

4.5

86

[70]

Average

41.5 (9.3)

138.3 (34.4)

33.4 (18.7)

5.84 (5.8)

75.2 (24.9)

Hardwood

Eucalyptus

Column

51

–

2.3

BDL

100

[32, 107] ^a

Eucalyptus

Column

–

–

15.8

9.9

37

[18]

Maple

Column

49

42

3

1.1

62

[91]

Maple/Birch

Pilot

–

–

7.6

0.9

88

[23]

Red Gum

Batch

44

–

55

7

87

[75]

Wild Cherry

Column

50

153

3

1.9

36

[91]

Oak

Column

50

41

3

1.2

62

[91]

Beech

Column

50

45

3

2

32

[91]

Average

48.8 (2.5)

70.3 (55.2)

11.6 (18.1)

3.45 (3.6)

63.0 (26.6)