The pulp and paper industry consists of manufacturing companies that convert predominately woody plant material into a variety of pulps, papers and paperboards. Wood consists of two primary components – cellulose and lignin. Cellulose, which is the fibrous component of wood, is used to make pulp and paper. Lignin is the “glue” that holds wood fibers together. Pulping is the process that reduces wood to a fibrous mat by separating the cellulose from the lignin. A pulp mill is a manufacturing facility that converts wood chips or other plant fiber sources into a thick fiber board, which can be shipped to a paper mill for further processing.
Pulping processes are generally classified as chemical, mechanical, or semi-chemical. The three chemical pulping methods are known as kraft, sulfite, and soda. Of these, the kraft process is the most common. In chemical pulping, wood chips are first mixed together with pulping chemicals under high pressure and temperature. The mixture is then washed to separate and clean the cellulose from the lignin and other chemicals. Cellulose can be further processed to meet the requirements needed to manufacture a wide variety of cellulose based pulp, paper and paperboard products. The lignin and other chemicals are recycled internally to make the process as efficient as possible, with residual waste materials being processed further to meet environmental requirements. McLanahan Corporation can help manufactures meet environmental regulations by separating these materials from the water stream, creating high concentrated solids materials for disposal, as well as clean, reusable process water. For more information on how McLanahan can improve sustainability in the pulp and paper industry, click below or contact us today.