Open AccessControl of the accumulation of non-process elements and organic compounds in pulp mills with bleach filtrate reuse. Quarterly report, October--December 1996
Author(s) -
W.J. Frederick,
Murray L. Laver,
Gregory L. Rorrer
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/465310
Subject(s) - calcium , pulp (tooth) , adsorption , chemistry , pulp and paper industry , barium , calcium oxide , bleach , pulp mill , mineralogy , waste management , chromatography , inorganic chemistry , organic chemistry , medicine , pathology , engineering , effluent
A portion of each filtrate sample was freeze-dried and the resulting solids were analyzed for ash content. Adsorption experiments with calcium and barium were carried at 70{degrees}C in a temperature controlled incubator under continuous mixing in order to simulate the environment experienced by brownstock as it moves through the Q stage. In the calcium experiments, it was difficult to accurately determine the calcium adsorbed on the pulp by measuring the depletion of calcium in the aqueous phase. Consequently, the technique was modified. In the modified technique, the calcium-adsorbed pulp is acid washed again to release the calcium. The calcium concentration in the washings is measured, and the calcium adsorbed on the pulp is estimated by material balance. Measurement of calcium adsorption on the brownstock pulp fibers from the L-P/Samoa mill have been obtained