Table 3 Means and standard deviation (s.d.) of total gas production (GP), methane (CH4) production and proportion (% CH4 on total GP) of the 339 observations belonging to 30 reference used for the final analysis. Additional file 2
References | No. a | GP, mL/g DM | CH4, mL/g DM | CH4, % on total GP | |||
|---|---|---|---|---|---|---|---|
mean | s.d. | mean | s.d. | mean | s.d. | ||
Lila et al., 2003 | 3 | 200 | 31.0 | 76.0 | 23.26 | 37.6 | 6.05 |
Getachew et al., 2005 | 21 | 235 | 20.9 | 53.8 | 15.65 | 22.6 | 5.20 |
Longo et al., 2006 | 8 | 131 | 70.5 | 24.8 | 17.33 | 18.0 | 4.14 |
Soliva et al., 2008 | 26 | 129 | 49.5 | 15.0 | 10.46 | 10.6 | 3.72 |
MartÃnez et al., 2010 | 4 | 480 | 17.7 | 45.2 | 5.41 | 9.4 | 0.78 |
Sallam et al., 2010 | 3 | 72 | 33.8 | 7.3 | 3.61 | 10.1 | 0.61 |
Xu et al., 2010 | 15 | 163 | 75.5 | 16.9 | 3.90 | 12.1 | 4.51 |
Guglielmelli et al., 2011 | 5 | 141 | 16.6 | 24.5 | 5.23 | 17.3 | 2.32 |
Lee et al., 2011 | 2 | 194 | 65.8 | 23.8 | 8.27 | 12.3 | 0.07 |
Navarro-Villa et al., 2011a | 27 | 141 | 59.9 | 20.5 | 8.78 | 14.8 | 2.58 |
Navarro-Villa et al., 2011b | 4 | 158 | 14.5 | 35.3 | 1.80 | 22.4 | 0.95 |
Pellikaan et al., 2011 | 11 | 276 | 70.7 | 47.3 | 9.65 | 17.5 | 2.22 |
Purcell et al., 2011a | 9 | 183 | 7.7 | 25.1 | 1.04 | 13.7 | 0.36 |
Purcell et al., 2011b | 7 | 171 | 17.5 | 31.3 | 3.45 | 18.3 | 0.48 |
Theodoridou et al., 2011 | 4 | 133 | 5.3 | 33.0 | 6.60 | 24.5 | 4.49 |
Pirondini et al., 2012 | 2 | 243 | 40.3 | 40.3 | 5.73 | 16.6 | 0.35 |
Boguhn et al., 2013 | 8 | 292 | 17.9 | 44.2 | 5.53 | 15.1 | 1.42 |
Geerkens et al., 2013 | 3 | 307 | 52.4 | 50.7 | 9.29 | 16.5 | 0.41 |
Patra and Yu., 2013b | 2 | 191 | 12.5 | 77.5 | 4.60 | 40.6 | 5.09 |
Ramin et al., 2013 | 32 | 223 | 77.5 | 36.2 | 9.83 | 16.9 | 3.03 |
Tuyen et al., 2013 | 4 | 95 | 41.8 | 17.6 | 7.17 | 19.1 | 2.39 |
Bezabih et al., 2014 | 58 | 200 | 39.5 | 41.9 | 11.91 | 20.9 | 4.19 |
Cattani et al., 2014 | 20 | 192 | 77.6 | 23.0 | 8.03 | 12.3 | 1.28 |
Elghandour et al., 2014 | 4 | 224 | 51.8 | 17.0 | 7.62 | 7.4 | 2.91 |
Kim et al., 2014 | 2 | 337 | 120.4 | 22.0 | 9.22 | 6.4 | 0.43 |
O’Brien et al., 2014 | 22 | 201 | 2.8 | 34.1 | 4.56 | 17.0 | 2.19 |
Pal et al., 2014 | 8 | 147 | 22.5 | 35.1 | 6.55 | 24.5 | 6.37 |
Hatew et al., 2015 | 4 | 312 | 23.8 | 54.5 | 5.78 | 17.5 | 0.63 |
Pal et al., 2015 | 18 | 101 | 33.3 | 11.5 | 2.57 | 12.2 | 3.11 |
Ramin et al., 2015 | 3 | 275 | 43.7 | 36.5 | 5.97 | 13.3 | 0.46 |