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Table 1 Properties of biochars used in this study

From: Enhancing methane production from food waste fermentate using biochar: the added value of electrochemical testing in pre-selecting the most effective type of biochar

Acronym Wheat bran Wood Orchard
Original feedstock Wheat bran pellets Coppiced woodlands Orchard pruning
Pyrolysis temperature (°C) 800 500 500
Particle size (mm) 1.7–2 1.7–2 1.7–2
BET specific surface area (m2/g) 55 ± 1 61 ± 1 13.7 ± 0.5
Electrical conductivity (S/m) 49.9 1.6 0.5
Total pore volume (cm3/g) 0.0445 0.0483 0.0165
Electron donating capacity (meq/g) 0.055 ± 0.01 0.199 ± 0.02 0.298 ± 0.02
Electron accepting capacity (meq/g) 0.434 ± 0.05 0.104 ± 0.01 0.404 ± 0.01