Influence of the membrane cut-off during ultrafiltration of kraft black liquor with ceramic membranes
Fractionation of kraft black liquor by ultrafiltration is receiving a great deal of interest at the moment, mainly because the extracted lignin can be used as a biofuel, but also because there are indications that the pulp quality is improved when permeate is used instead of black liquor as the diluent in the cooking process. Fractionation of kraft black liquor calls for membranes that can withsta
