OPERATING PARAMETERS OF EXTRACTION SYSTEMS FOR OPTIMUM PULP PRESSING

During the 1993 campaign two new pulp presses were installed in two di fferent factories of the H.S.I. Each press was to prove a capacity of pulp pressing corresponding to 2500 t of beet per day and to give pres sed pulp of 25% dry substance content. While the test runs in the firs t factory were successful this was not the case in the other factory. The technological guarantee was given under special assumptions regard ing the following parameters: Marc of the beets, dry substance content of the wet pulp, pH value of press water, maximum extraction temperat ure, temperature of the wet pulp, temperature after the cossette mixer , extraction water hardness, nominal capacity of the extraction plant and use of biocides. The differences of the above parameters in each f actory compared also to the conditions specified by the other bidders are discussed and some conclusions are drawn for their optimization.