The Reduction of Sulphur Containing Compounds in Wood Pulp and Paper Manufacture

Abstract

Blackening during the manufacture of pulp stock is due to formation of black accumulations in and on the equipment used. The organism in question is Micro-spora Desulphuricans Bey. This reduces S-containing compounds with production of H2S, which in turn unites with Fe to form sulphide. Both the S and the Fe necessary to produce this change are present in the wood used in manufacture of the product but possibly additional S may be utilized from sulphite used in the processes. Fe from Fe piping may also aid the change. The source of the organisms is the water supply. Cultural reactions of 8 pure strains of the organism were carried out. In certain carbohydrate reactions, these are found to be variable.