In pulping and papermaking, dirt particles significantly affect the quality of paper. Knowledge of the dirt type helps to track the sources of the impurities which would considerably improve the paper making process. Dirt particle classification designed for this purpose should be adaptable because the dirt types are specific to the different processes of paper mills. This paper introduces a ge...

Conventional methods used for the quantification of adherent material contained in a pulp suspension propose either filtration of the sample, which may lead to loss of sticky material in the filtrate, or dilution of the pulp, which may cause destabilization of the dissolved and colloidal material; thus, leading to unreliable results. In 1998, the Cellulose and Paper Group of University Complute...

Electrochemical generation of oxidants was studied to find new solutions to control microbial contamination at paper mills. Laboratory and semipilot trials using a Wet End Simulator indicated that the combination of an electrochemically produced halogen-containing oxidant together with sodium percarbonate was an efficient new biocide concept, especially in fine papermaking. Addition of sodium p...

With the development of social economy, environmental protection projects have attracted wide attention from all walks life, especially in industrial development, which can pay to problems. Inorganic chemicals important value industry and be well used for scientific treatment wastewater. It mainly includes specific application inorganic printing dyeing wastewater, heavy metal papermaking fur, s...