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

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

Substrate	No. of samples	DM	oDM	Bulk density	Own investigation			Literature
		%	% DM	kg/m³	Specific biogas	Absolute biogas	Methane	Specific biogas	Source
		%	% DM	kg/m³	nl^a/kg oDM	nl/kgFM	%	nl/kg oDM	Source
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]
From fresh cuttings	2	8	72	1000	507 ± 1	29	n.a.	600^c	[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

ISSN: 2192-0567