From: Using aquatic plant biomass from de-weeding in biogas processes—an economically viable option?
Variable | Unit | Value | Source |
---|---|---|---|
Electrical power | kWe | 500 | [2] |
Full load hours | h/a | 8000 | |
Electrical efficiency | % | 40 | |
Digester volume | Cubic meter (cbm) | 2570 | [64] |
Year of commissioning Dry matter (DM) content | Year | 2010 | We assume that the plant is in its sixth year of operation |
DM of maize silage | % | 34 | |
DM of Elodea silage | % | 7 | [27] |
DM of Elodea-straw mix silage | % | 30 | [27] |
Volatile solids maize silage | % of DM | 95 | [67] |
Volatile solids Elodea silage | % of DM | 80 | [24], for fresh material not silage |
Volatile solids Elodea-straw mix silage | % of DM | 90 | Estimation |
Methane potential of maize silage | cbm/tonne fresh matter (FM) | 110 | |
Methane potential of Elodea silage | cbm/tonne FM | 15 | [27] |
Methane potential of Elodea-straw mix | cbm/tonne FM | 50 | [27] |
Feed-in-tariff for energy crops | EUR/kWhe | 0.20 | [71]; we used the RESA 2009 since the number of newly erected biogas plants reached a peak during 2009–2011 |
Feed-in-tariff for waste | EUR/kWhe | 0.13 | [71]; RESA 2009 |
Disposal cost for aquatic biomass (biogas plant gate fee) | EUR/tonne | 30.00 | Based on our survey |
Disposal cost for digestate | EUR/tonne | 5.00 | [32] |
Cost of maize silage (fresh matter) | EUR/tonne | 40 | |
Cost of straw (fresh matter) | EUR/tonne | 81.41 | [74] |
Calorific (heating) value of methane | kWh/cbm | 9.97 | [75] |
Utilization percentage of methane potential | % | 98a 96b 97c | Estimations based on [34] |
Digestate/input ratio | % | 85 |