Fig. 1 shows the streams, which enter and leave a combined sugar factory/distillery (or any other biotechnological industry). This takes into account that a lot of molasses produced by the sugar factories is utilized in the biotechnology field in general and in the production of ethyl alcohol in particular. Certainly the Achilles’ heel of traditional sugar technology from the environmental point of view is the calco-carbonic purification process. The amounts of lime utilized (Fig. 2) are very important and this is really a considerable ecological problem. Such lime, which has to be of a good quality to avoid processing problems, is obviously obtained from mines thus creating problems from the ecological and landscape points of view. Recently, under pressure from ecologist groups, many mines have been closed so that the availability of good quality lime has decreased and, consequently, its price has increased. Attempts to decrease the use of lime have indeed contributed to relief of the problem but it remains unresolved mainly if it is considered from the sludge production point of view. This enormous amount of sludge is difficult to dispose of even if we take into consideration its possible utilization for amending the soil in agriculture or as a raw material in the cement production. Bearing in mind that paper mills also utilize lime, we tried to utilize the sugar factory sludge for paper production with the aim of both decreasing the total consumption of lime and solving the problem of sludge disposal.