Utilization of Biodiesel By-Products for Biogas Production

Table 4

Composition of rapeseed, rapeseed cake after extraction of 60, 70, and 75% of oil and rapeseed meal, in percents of total solids [111].

Feed stock	Rapeseed	Rapeseed cake			Rapeseed meal
Portion of extracted oil		60%	70%	75%
Crude oil	45	24.7	19.7	17	4.5
Crude protein	23	31.5	33.6	34.7	40
Crude fibre	7	9.6	10.2	10.6	12.3
Ash	5	6.8	7.3	7.5	7.7