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

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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.

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