Corecovery of Bio-Oil and Fermentable Sugars from Oil-Bearing Biomass

Table 6

Energy and price balances from jatropha whole seed processing using first and second pathways.

	First pathway	Second pathway
Heat of combustion inputs (Btu/lb whole seed)^a	10963	10963
Heat of combustion outputs (Btu/lb whole seed)^b	10954	7586
% recovery	99	69
costs of feedstock/lb^c	0.22	0.22
market value of products/lb of whole seed^d	0.99	0.55
% profit	350	150

aHeat of combustion of inputs stated as that of jatropha whole seed [9].
^bHeats of combustion of outputs obtained from jatropha oil (17498 Btu/lb), fermentable sugars (glucose (6700 Btu/lb) and xylose (6710 Btu/lb) in 2 : 1 ratio) and protein-rich meal (calculated from kernel cake (7825 Btu/lb) and seed cake (10791 Btu/lb) by substracting the contribution from carbohydrate components) [5, 9, 10].
^cCosts of inputs estimated from commodity price of soybean whole seed [11].
^dPrice of protein-rich meal and bio-oil estimated from soybean and fermentable sugars from 25 kg glucose at Sigma Aldrich [11].