摘要:
A process and apparatus improvement for energy and particulate recovery during the production of nixtamalized corn flour, by precooking with a lime solution to effect partial cooking, reduced energy use for pre-cooking and washing by recycling hot water. Next, moisture content is stabilized, and the corn is milled and dried in a super-heated stream of air with reduced energy consumption by recycling waste hot air. Dust trapping is performed on a portion of waste hot air which is reused for preheating combustion air. Wet scrubbing of the remaining waste hot air is performed where heated water is reused and exhaust air vented. Cooling and further drying of the dried-milled particles follows. A fine grind or flour is separated and recovered from the coarse grind which is also aspirated to isolate a hull fraction as corn waste along with particulate collected after entrapping and scrubbing waste hot air. Re-milling and sieving the coarse grind produces a corn flour for tortilla and the like.
摘要:
Precooked and partially-debranned corn flour is continuously produced by an enzymatic precooking using a commercial xylanase as a processing aid. The low-temperature and near neutral-pH precooking with a xylanase effected a partial bran hydrolysis while avoiding excessive pregelatinization, reduced washing, and corn solid loss in wastewater. Moisture content is then stabilized, followed by milling and drying at a high-temperature and short-time to produce a controlled gelatinization in the ground kernel, cooling and further drying the dried-ground particle. A fine particle size or flour is separated and recovered from the coarser particle which is also segregated to partially isolate a bran fraction for animal feed or integral flour, remilling and sieving the coarser particle to produce an instant corn flour for arepa, and admixing the fine particle with lime to obtain a masa flour for tortilla and other snack foods.
摘要:
This invention relates to methods and apparatus for processing grain, such as corn, into flour and dough useful in making foodstuff products, such as tacos, tortillas, corn chips, etc. In one embodiment, atmospheric pre-heating of the grain with consequent cracking of the hull is combined with the softening effects of a lime water spray to deliver partially cooled grain in a comparatively dry state to a mill for efficient pulverization, following which it is made into a dough which is finally cooked and formed into the desired end product.
摘要:
Precooked and partially-debranned corn flour is continuously produced by an enzymatic precooking using a commercial blend of xylanase, endoamylase and endoprotease as a processing aid. The low-temperature and neutral-pH precooking with an endoenzyme solution effected a partial bran hydrolysis while avoiding excessive pregelatinization, reduced washing and corn solid loss in wastewater. Moisture content is then stabilized, followed by milling and drying at a high-temperature and short-time to produce a controlled gelatinization and denaturation in the ground kernel, cooling and further drying the dried-ground particle. A fine particle size or flour is separated and recovered from the coarser particle which is also segregated to isolate a partially hydrolysed bran fraction for integral flour or animal feed diet, remilling and sieving the coarser particle to produce an instant corn flour for snack, and admixing the fine particle with lime to obtain a masa flour for tortilla and other corn foods.
摘要:
Machines and methods are disclosed for making arepas from corn flour dough in a cavity situated between abutting, opposing forming members. When the forming members are closed, dough occupying the cavity is circular in the plane where said members abut, and is of progressively increasing thickness dimension toward its axis. The forming members are then moved apart from each other and the arepa preform is disassociated from the forming members and its entire outer surface, but not its interior, is cooked using primarily radiant and/or convective heat. In some embodiments, the dough is extruded directly into the cavity while the forming members are already abutting each other. In others, the dough is extruded, a preform plug is severed from the extrusion, the cavity portion of one of the forming members is pressed down against the preform plug while it sits on a distensible surface backed by a backing member having a circular central void. That surface distends into the void so that the distended surface describes the remainder of the cavity. The first forming member is then raised and the deformable surface contracts to a flat condition, so that the uncooked arepa sits on top of that surface for removal and cooking.
摘要:
Biologically pure cultures of Bacillus subtilis were isolated from the pericarp of nixtamalized corn. The Bacillus microorganisms were characterized and found to produce novel peptides which have antimicrobial activity. The Bacillus microorganisms are active against Gram-positive bacteria and may be used as an agent to prevent spoilage in foods. The Bacillus microorganisms may be included in probiotic food compositions to help maintain healthy gastrointestinal flora and modulate animal digestion.
摘要:
Biologically pure cultures of Bacillus subtilis were isolated from the pericarp of nixtamalized corn. The Bacillus microorganisms were characterized and found to produce novel peptides which have antimicrobial activity. The Bacillus microorganisms are active against Gram-positive bacteria and may be used as an agent to prevent spoilage in foods. The Bacillus microorganisms may be included in probiotic food compositions to help maintain healthy gastrointestinal flora and modulate animal digestion.
摘要:
Precooked and partially-dehulled corn flour is produced using an acid-cooking in a continuous process, by acid-precooking to effect corn hull hydrolysis with sodium metabisulfite or sodium hydrogen sulfite or sodium sulfite, with reduced kernel washing and solid loss. Moisture content is then stabilized, followed by grinding and drying in a super-heated stream of air, cooling and further drying the dried-ground particle. A fine grind or flour is separated and recovered from the coarse grind which is also segregated to isolate a hull fraction as corn hull waste, regrinding and sieving the coarse grind to produce an instant corn flour for arepa, and admixing the fine grind with lime to obtain a masa flour for tortilla and the like.
摘要:
Apparatus useful for removing articles cut from a sheet of flexible material includes a gas transmissive conveyor belt that is brought into proximity to the exposed surface of the articles, a suction roll which backs the conveyor belt and has an internal vacuum and passageways for exposing said vacuum to the outer surface of the suction roll in configurations corresponding the leading portions of the articles, and means for causing the passageways to register substantially with the leading regions of the articles. Embodiments may also include passageways which are arcuately arrayed in groups, a cylindrical cutter roll for cutting out the articles from the sheet as it is being transported by a carrier surface, and/or a carrier surface in the form of a roll face.