Patent EP-2270237-A2 (EP)
Inventor: ROICK THOMAS DR
IPC: A23K10/32
Filed: 2010-06-02
Abstract: Making a water-soluble arabinoxylan from wheat flour comprises (a) producing a flour-water suspension; (b) maintaining the suspension for 3-10 minutes; (c) diluting the suspension with circulating water (101); (d) decanting the flour-water suspension; (e) separating the head water (108); (f) recycling the heavy fraction (106); (g) adding alpha -amylase to light fraction; (h) dextrinizing light fraction; (i) storing the hydrolyzate; (j) centrifuging the sediments; (k) grinding and drying the sediments; (l) sterilizing the hydrolyzate; (m) saccharifying the hydrolyzate; and (n) ultrafiltering. Preparing a water-soluble arabinoxylan from wheat flour comprises: (a) producing a flour-water suspension; (b) maintaining the suspension for a rest period of 3-10 minutes; (c) diluting the flour-water suspension with circulating water (101); (d) decanting the flour-water suspension by a three-phase decanter (105) in a centrifugal field; (e) separating the resulting head water (108) in a further centrifugal field; (f) recycling the heavy fraction (106) obtained in the further centrifugal field in the starch extraction cycle; (g) adding alpha -amylase to the light fraction obtained in the further centrifugal field; (h) dextrinizing the light fraction with a jet-cooker (120); (i) storing the hydrolyzate with flocculation and sedimentation in a reaction vessel for 0.3-13 hours at a pH of 1-10; (j) centrifuging the sediments; (k) grinding and drying the sediments; (l) sterilizing the cleared hydrolyzate; (m) saccharifying the sterilized, cooled and dextrinated hydrolyzate in a stirred reactor using glucoamylase with simultaneous proteolysis with a mixture of an alkaline and a neutral protease; (n) ultrafiltering the hydrolyzate by a multistage ultrafiltration, where a permeate and a retentate are obtained and the retentate volume is no more than a fifth of the initial volume; (o) evaporating the permeate until a concentration of 50-90% dry substance is reached; (p) evaporating the retentate until a concentration of 20-50% dry matter is reached; (q) recycling the two evaporation condensate in the starch process; (r) precipitating the evaporated retentate to an ethanol concentration of 60-80 mass% in a cycle that is operated in semi-batch procedure, where the ethanol is formed by a stirred reactor containing 94-99 vol.% of ethanol at 5-70[deg] C, additionally by a high speed rotor-stator-mixer, and an addition possibility of concentrated retentate in a bypass inlet of the rotor-stator mixer is under vacuum conditions; (s) filtering and washing the filter cake with 94-99 vol.% of ethanol and subsequent drying and grinding; and (t) reconditioning and recycling the ethanol used for washing. Independent claims are included for: (1) a protein containing feedstuff, obtained as ground and dried filter cake in step (k), where the protein content is 15-50 (preferably 35)% of the dry matter; and (2) a water-soluble dietary fiber concentrate comprising arabinoxylan and arabinogalactan, as main components, where the end product has a total dietary fiber content of 50-80% of dry matter, and the water-soluble dietary fiber concentrate has a polymerization degree of 100-140 carbohydrate building blocks.