| abstract |
The invention relates to a process and apparatus for manufacturing a product from lignocellulose-based raw stock. According to the invention, cellulose fibers are separated from the raw stock in a water suspension to provide a fiber suspension (5a), water (27,28) is removed from the fiber suspension so as to have in the fiber suspension a percentage of solids (5b) of between 10 and 50 w-%, the fiber suspension (5b) is treated by enzymatic hydrolysis (6) to form at least one sugar-based fraction (7), the sugar-based fraction is fermented (8) to form at least one product fraction (11), at least one selected product fraction (13) is separated from a residual fraction (10), and the residual fraction is led to anaerobic treatment (22) to form biogas (21). |