Integration of the biorefinery concept for the development of sustainable processes for pulp and paper industry

•Superstructure of integrated biorefinery in pulp and paper industry was developed.•It includes pulping, biochemical production and black liquor utilization sections.•Lignocellulosic biomass extracted from eucalyptus and bagasse are the feedstocks.•Potential of integrated biorefinery process was illustrated in three scenarios.•Integrated succinic acid and lactic acid can improve profitability.