摘要:
The present invention relates to a method for preparing a lactose-containing powder. Said method includes the consecutive steps of: a) concentrating a lactose-containing liquid so as to obtain a concentrated liquid having 55% to 65% dry matter content, said concentration Step a) having a duration between 10 and 20 minutes; b) overconcentrating the concentrate obtained from Step a) so as to obtain an overconcentrated material having 75% to 80% dry matter content, said overconcentration Step b) having a duration varying from 2 to 10 minutes; c) granulating the overconcentrate obtained from Step b) by mixing said overconcentrate with a lactose-containing powder, having at least 95% dry matter content, until a granulated powder having dry matter content with at least 85% dry extract is obtained; and d) drying the granulated powder obtained from Step c) so as to obtain a lactose-containing powder having at least 95% dry matter content.
摘要:
The present invention refers to a process for the production of simple sugars starting from a cellulose material, comprising the steps of: feeding a continuous flow of the cellulose material or a mixture composed of the cellulose material and water to a turbo-reactor(A) comprising a horizontal axis cylindrical tubular body (1), provided with at least one opening (5, 6) for introducing the cellulose material or the mixture and reagents, at least one discharge opening (7) of the treated material, a heating jacket (4) for bringing the inner wall of the tubular body (1) to a predetermined temperature, a bladed rotor (8), rotatably supported in the cylindrical tubular body where it is put in rotation at speeds in the range of 15-40 m/s, so as to disperse said continuous flow of cellulose material or its mixture in a flow of cellulose material particles, feeding into said turbo-reactor (A), in counter-current with the flow of cellulose material or with the mixture, a continuous and finely subdivided flow of a reagent capable of breaking the integrity of the molecular structure of the cellulose material, making it particularly accessible for being digested during an enzymatic treatment, centrifuging the particles of cellulose material and the reagent against the inner wall of the turbo-reactor, heated to a temperature of at least 150°C, with formation of a highly turbulent, dynamic, thin tubular fluid layer, wherein the cellulose material particles and the reagent are mechanically maintained in close contact by the blades (9) of the bladed rotor (8), making the cellulose material and the reagent react in the thin layer while it advances in substantial contact with the inner wall of the turbo-reactor (A) towards the discharge opening (7), continuously discharging a flow of treated cellulose material, sending the flow of treated cellulose material to an enzymatic digestion step with the addition of a sufficient quantity of specific enzymes for hydrolysing the treated cellulose material, with the obtainment of said simple sugars.
摘要:
A process is described for drying melamine wet cakes, comprising the steps of: a) providing a turbo-dryer (T) comprising a cylindrical tubular body (1) having a heating jacket (4), inlets and outlets (5, 6) and a bladed rotor (7) rotatably supported therein; b) feeding a continuous flow of a melamine wet cake into the turbo-dryer (T), the internal wall (9) of which is maintained at a temperature of at least 220°C; c) feeding a continuous flow of a gas selected from air or nitrogen into the turbo-dryer (T); d) subjecting the flow of melamine wet cake to the mechanical action of the bladed rotor (7) rotating at a speed of at least 200 rpm, with consequent centrifugation of the wet cake against the heated wall (9), thus causing the instantaneous evaporation of the water contained into the cake, and transport of the latter towards the outlet (6); e) continuously discharging, after an average residence time of less than 1 minute, a flow of melamine crystals having a humidity content of less than 0.1%.