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Table 9 Characterization of substrates used for semi-continuous biogas production (average ± standard deviation) [26]

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

Parameter Unit Blackwater Greasy water Lawn juice 1 fed in periods I and II Lawn juice 2 fed in period III
pH 7.4 ± 0.2a 4.8 ± 0.2a 4.2 ± 0.2d 6.2 ± 0.2e
DM % 0.52 ± 0.06b 1.95 ± 0.22c 4.64 ± 0.12c 2.07 ± 0.25f
oDM % DM 59.6 ± 7.69b 67.69 ± 10.25c 77.59 ± 14.01c 68.12 ± 13.04f
COD mg/l 8611 ± 1664b 41,783 ± 11,185c 64,061 ± 11,325c 23,200 ± 3726f
TOC mg/l 2371 ± 477b 6544 ± 957c 27,450 ± 7,215c 8748 ± 2714f
TN mg/l 1753 ± 248b 323 ± 136c 2,272 ± 713c 917 ± 312f
  1. a60 analysed samples
  2. b9 analysed samples
  3. c5 analysed samples
  4. d38 analysed samples
  5. e22 analysed samples
  6. f3 analysed samples
  7. g7
  8. h10