Patent ID: 6899902

Claim:
A process for preparing water-insoluble ginseng dietary fiber, comprising: (a) obtaining a ginseng residue produced as a by-product of ginseng extraction, and drying and grinding the ginseng residue; (b) feeding the dried and ground ginseng residue into a twin-screw extruder with a L/D ratio of 20˜40 and operating the twin-screw extruder at a screw speed of 150˜400 rpm, a feed rate of 20˜60 kg/hr and a moisture content of 15˜40% to produce an extruded ginseng residue; (c) adding the extruded ginseng residue to water at a concentration of 1˜10% (w/v) to prepare a sample, agitating and centrifuging the sample to produce a supernatant and a precipitate; and (d) drying the precipitate obtained by centrifugation to obtain water-insoluble ginseng dietary fiber.