9 Appendix 9.1
Feedstock recovery
Table A1. Yield and properties of the recovered broccoli and kale leaves given as range for the economic assessment. Ww = wet weight.
Parameter
Unit
Total aboveground biomass yield Leaf sharea DM content leaves Leaf biomass from additional harvest a
[ton ww/ha]
Broccoli
Kale
low
hig h
low
hig h
49
160
21
65
(Fink, Feller et al. 1999)
[%ww]
23. 57.9 11. 23.4 Field experimental data 5 8
[%]
12. 25.7 14. 22.8 Field experimental data 5 0
[t DM/ha]
3.5
9.7
0.4
0.9
Of total aboveground biomass before harvest. For kale, number refer to the residual leaf share after harvest
Table A2. Working time requirements and related costs for additional harvest of broccoli and kale leaves based on Ascard et al. (Ascard, Håkansson et al. 2008).
Parameter
Unit
Harvest: labour
Harvest: machinery
low
high
low
high
Work
[h/ha]
67
75
13
15
Costs
[€/ha]
1257
1407
146
169
a
Transport: machinerya low
high
169
253
Estimated at approx.. 2.8 €-ct/kg (Ascard, Håkansson et al. 2008).
9.2
Protein fractionation
127
