where G(t) is the cumulative biomethane yield at time t (L CH4/
kg VS), G0 is the Biomethane potential of the substrate recorded
(L CH4/kg VS), k is the Biomethane production decay rate constant
(days1), t is the time of BMP test in days and D is the lag phase
(days).
Table 2
Ultimate analysis of Ulva lactuca samples.
Ulva lactuca C H N C:N ratio DS (%) VS (%) pH Protein (%)
1. Fresh 25.4 3.7 3.3 7.7 19 11 6.99 21.4
2. Wilted and unwashed 27.2 4.0 3.1 8.7 20 11 7.77 21.1
3. Washed and dried 22.3 3.3 2.3 9.6 72 40 7.35 23.7
4. Washed and wilted 23.3 3.2 2.6 8.8 32 16 7.60 20.8
Fig.