Mass and energy balances showed that 61,600 t/a polymer-grade ethylene, 58,520 t DM/a organosolv lignin, 38,400 t/a biomethane an 90,800 t DM/a hydrolysis lignin can be produced with a total energy efficiency of 87.1%. A discounted cash flow analysis indicated that the heat integrated biorefinery concept is not yet profitable.