Method for purifying and concentrating beet sugar manufacture clarified juice and sugar making method adopting method for purifying and concentrating beet sugar manufacture clarified juice

The invention relates to a method for concentrating and purifying beet sugar manufacture clarified juice. The method comprises the steps that 1, the beet sugar manufacture clarified juice which is suitable for nanofiltration is obtained; 2, the temperature of the beet sugar manufacture clarified juice is reduced to be not lower than 30 DEG C from about 90 DEG C; 3, the beet sugar manufacture clarified juice is filtered and concentrated through a nanofiltration film with the molecular weight cut off of 220 Da to 500 Da under the pressure of 10 Bar to 40 Bar, thereby obtaining the concentrated and purified beet sugar manufacture clarified juice. The invention further relates to a sugar making method comprising the step 1 to the step 3. The brix of the concentrated clarified juice which is obtained through the method for concentrating and purifying the beet sugar manufacture clarified juice is improved by 4 Brix to 7 Brix, the sugar degree of the concentrated clarified juice is improved by 4wt% to 7wt%, the puri