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Pollach, G.; Hollaus, F.: Use of monosaccharide degrading infections in diffusion to improve pulp pressing (German). Zuckerindustrie 113 (1988) pp. 132-136.   List of papers

Abstract: Decomposition of monosaccharides has been observed during studies of the efficiency of desired infections in the extraction plant of a sugar factory during the 1985 campaign. Within the framework of the present paper an attempt was to be undertaken during the campaign 1986 to determine whether these findings could be confirmed and what would be the results of a cost-utility study within this context. For this purpose, several assessments of the pressability of beet pulp and sugar losses were made under conditions of an uncontrolled infection. A further study was intended to determine, whether the continuous addition of formalin in the lower regions of the extraction towers could limit the infection without any interference with pressability. Finally an attempt was made to achieve a comparison between infected and sterile operation of the extraction facility with the aid of shock dosage. While with experiments during the first 15 days of campaign better results were achieved by means of the uncontrolled infection than with formalin dosing, in respect of strong influence on the pressed pulp dry substance, experiments later in the campaign showed that limitation of the infection by continuous dosing with formalin gave more favourable results. In a comparison between shock dosage and uncontrolled infection, the latter gave better results as in the 1985 experiments, owing to the decomposition of glucose and fructose and the improvement in the pressability of the exhausted pulp - in spite of the sharp reduction in energy prices that had taken place in the meantime.