As one kind of biomass resources, wood raw materials can be used for pulping and papermaking in pulp and paper industry.
Owing to the different treatment methods to wood chips, including mechanical, chemi-mechanical, and chemical method, the resultant pulp yields range from approximately 90% or more to 50%. Except for obtained pulp, most of the rest in wood raw materials are discharged into pulping spent liquor for further treatment.
In a point view of efficient utilization of biomass resources as much as possible, chemi-mechanical pulping method has been attracted more attention due to its higher pulp yield (above 85%), higher bulk and opacity, and a lower pulping cost, compared to a chemical pulping method.
Source: Science Trends