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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

From: Application of denitrifying wood chip bioreactors for management of residential non-point sources of nitrogen

  Wood Type Type of Study Carbon Content (%) Leached TOC (mg TOC/L) Influent Concentration (mg N/L) Effluent Concentration (mg N/L) N – Removal (%) Reference
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)  
  1. Standard deviation (if applicable) is in parenthesis. BDL: below detection limit
  2. a Study that reported ADC