Pulp process flow

Traditional pulping refers to the production process of decomposing plant fiber raw materials into colored or bleached pulp by chemical method, mechanical method or a combination of the two. Usually, the process is crushing, cooking, washing, screening, bleaching, purifying and drying plant fiber raw materials. A new biological pulping method has been developed in modern times. Firstly, special strains (white rot fungi, brown rot fungi and soft rot fungi) are used to decompose lignin structure, then the remaining cellulose is dissociated by mechanical or chemical methods, and then bleaching is carried out. In this process, most lignin has been opened by biological decomposition, and chemical methods only play an auxiliary role. Compared with the traditional method, it uses less chemical products, so it can discharge less or no waste liquid, which is an environmentally friendly and clean pulping method.