Energy (and Resource) Recovery from Paper Pulp Waste through Residue Derived Fuel and Plasma Gasification Processes

To meet the condition for reutilization of derived energy and melting ash, the plasma gasification process was adopted to use high temperature of plasma furnace to gasify wastes (e.g., paper reject, paper sludge and hydro-cleaner residues). Processing paper pulp to residue derived fuel (RDF) can enhance physical stability and improve gasification efficiency. Paper pulp derived RDF has 12% ash, 15~20% moisture, and heating value of about 5,900-6,300 kcal/kg. Using RDF to formulate mixture will keep heating value constant. As the melting ash residue will be vitrified after high temperature process, if properly adjusting the composition, it can be made into environmentally-friendly cement close to F-class or C-class for construction use, so that the resource can be fully recovered. The goal of this study is to adjustment of sludge, paper reject and sand, glasses from hydro-cyclone to precede the gasification process. Then, use XRF to analyze the concentration of melting ash, and compare with the F-class and C-class cement and conclude the optimized proportions of mixture.