Updating technological modes for concentrated sugar-containing solutions purification

Existing technological schemes of lime-carbon dioxide purification of diffusion juice include lime treatment (defecation) and two-stage treatment with carbon dioxide (saturation) with sediment separation. Improving cleaning methods aimed at increasing its efficiency is an urgent task. Lime-carbon dioxide purification of the concentrated sugar-containing solution before boiling allows to improve the quality of sugar, reducing the syrup color and increasing its natural alkalinity. The proposed purification scheme, which includes overcarbonation to low syrup pH values (8 and below), its mixing with carbonated syrup and adding activated suspension of II saturation sediment, makes it possible to obtain a purified solution with an increased effect of adsorption purification, with a significantly low content of high-molecular compounds and their calcium salts. The results of the study of various schemes for the purification of syrups in a laboratory setup have been presented. A method for purification of concentrated sugar-containing solutions, protected by a patent of the Russian Federation for the invention, has been developed, which provides for the reduction in the consumption of calcium hydroxide by 0,10–0,12% of CaO by weight of the product or by 0,04% by weight of beet.