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Table 7 Biogas potential of different substrates, our own analysis (average values + standard deviation) in comparison with literature values

From: Biogas and nutrients from blackwater, lawn cuttings and grease trap residues—experiments for Hamburg’s Jenfelder Au district

Substrate No. of samples DM oDM Bulk density Own investigation Literature
% % DM kg/m3 Specific biogas Absolute biogas Methane Specific biogas Source
nla/kg oDM nl/kgFM % nl/kg oDM
Blackwater 6 0.6 60 1000 489 ± 51 2 n.a. 500 [37]
Greasy water 10 3 94 1000 1066 ± 42 30 n.a. 1000 [22]
Lawn cuttings          
 Fresh 2 38 52 300 393 ± 4 78 n.a. 300 [13]
550–680 [22]
300–600 [38]
700 [21]
 3 months stored 2 23 62 600 329 ± 12 87 71   
 6 months stored 2 33 78 600 419 ± 19 60 70 600 [ 22 ]b
Lawn juice          
 From fresh cuttings 2 8 72 1000 507 ± 1 29 n.a. 617 [36]
600c [11]
 From 3 months stored cuttings 2 4 65 1000 352 ± 25 4 59   
 from 6 months stored cuttings 2 2 55 1000 633 ± 66 17 64   
  1. aNorm litre
  2. bGrass silage
  3. c350–400 l methane/kg oDM with an assumed methane rate of 60 % in the biogas