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Table 7 Product quality direct comparison: nitrogen compounds (NH4-N/NO3-N ratio) in COMBI blends and digestate

From: Production and characterization of co-composted biochar and digestate from biomass anaerobic digestion

Parameter U.M. CD CB1 CB2 CB3 Method
Total N % w/w d.b. 4.2 2.8 2.7 2.4 ANPA 13 Man 3 2001
Organic-N/total N % 99.15 99.65 99.55 99.63 ANPA 14 Man 3 2001
Nitrate-N % w/w d.b. 0.280 0.100 0.180 0.130 EPA 300.11997
Ammonium-N % w/w d.b. 0.036 0.010 0.012 0.010 ANPA 14 Man 3 2001
NH4-N/NO3-N ratio   0.129 0.100 0.067 0.077
C/N   9.55 15.99 16.80 21.08