The present disclosure relates to waxy maize starches having desirably high process stability, and to methods relating to them, including methods for making and using them. One aspect of the disclosure is a waxy maize starch having an amyiopectin content in the range of 90-100%; wherein the amyiopectin fraction of the waxy maize starch has at least 28.0% DP3-12 branches: and no more than 53.0% DP 13-24 branches, no more than 16.0% DP 25-36 branches. Such waxy maize starches can be advantaged over conventional waxy maize starches in that they can have increased process stability, especially with respect to freeze-thaw stability. Methods of making the starch materials, using exo-hydrolyzing enzymes and methods of using the starch materials in food products are also described.

A method for producing a heat-modified starch, comprising the steps of: (i) preparing a starch milk having a solids content of between 20% and 45% by weight and adding an alkaline agent, so as to obtain a final conductivity of between 4 and 7 mS/cm (ii) filtering the starch milk so as to recover a starch cake; (iii) introducing the starch cake, continuously, into a dryer at the same time as a continuous stream of hot air in order to recover a dried powder; (iv) continuously supplying a turboreactor with the dried powder, and by setting parameters for the speed of rotation of the stirrer, so that the dried powder is continuously centrifuged and conveyed into the turboreactor; (v) recovering the heat-modified starch produced.

A method for producing a heat-modified starch, comprising the steps of: (i) preparing a starch milk having a solids content of between 20% and 45% by weight and adding an alkaline agent, so as to obtain a final conductivity of between 4 and 7 mS/cm (ii) filtering the starch milk so as to recover a starch cake; (iii) introducing the starch cake, continuously, into a dryer at the same time as a continuous stream of hot air in order to recover a dried powder; (iv) continuously supplying a turboreactor with the dried powder, and by setting parameters for the speed of rotation of the stirrer, so that the dried powder is continuously centrifuged and conveyed into the turboreactor; (v) recovering the heat-modified starch produced.

A method for preparing V-type granular porous starch includes the following steps: mixing starch and an ethanol aqueous solution in a temperature of 100-150° C. to yield V-type granular starch; and adding a mixed enzyme including alpha-amylase and amyloglucosidase to a mixture of the V-type granular starch and the ethanol aqueous solution, to enzymatically hydrolyze the V-type granular starch to yield V-type granular porous starch.

A method for preparing V-type granular porous starch includes the following steps: mixing starch and an ethanol aqueous solution in a temperature of 100-150° C. to yield V-type granular starch; and adding a mixed enzyme including alpha-amylase and amyloglucosidase to a mixture of the V-type granular starch and the ethanol aqueous solution, to enzymatically hydrolyze the V-type granular starch to yield V-type granular porous starch.

An inhibited non-pregelatinized granular starch suitable for use as a food ingredient in substitution for a chemically modified starch may be prepared by heating a non-pregelatinized granular starch in an alcoholic medium in the presence of a base and/or a salt. Steam treatment may be used to enhance the extent of inhibition.

An inhibited non-pregelatinized granular starch suitable for use as a food ingredient in substitution for a chemically modified starch may be prepared by heating a non-pregelatinized granular starch in an alcoholic medium in the presence of a base and/or a salt. Steam treatment may be used to enhance the extent of inhibition.

The embodiments of the present application provide a maize fiber processing system and a maize wet-milled starch processing system using same. The maize fiber processing system comprises a pressure curved screen group, a fiber washing sink group, an enzyme preparation adding device and an external enzyme reaction tank, wherein the external enzyme reaction tank is used for receiving screen overflow from a middle stage of pressure curved screen or fiber slurry in a middle stage of fiber washing sink and providing a place for enzyme reaction, thereby extending reaction time of enzyme participation. In addition, the reaction efficiency of the enzyme preparation can be further improved by means of controlling the fiber dry substance concentration in the external enzyme reaction tank.

The embodiments of the present application provide a maize fiber processing system and a maize wet-milled starch processing system using same. The maize fiber processing system comprises a pressure curved screen group, a fiber washing sink group, an enzyme preparation adding device and an external enzyme reaction tank, wherein the external enzyme reaction tank is used for receiving screen overflow from a middle stage of pressure curved screen or fiber slurry in a middle stage of fiber washing sink and providing a place for enzyme reaction, thereby extending reaction time of enzyme participation. In addition, the reaction efficiency of the enzyme preparation can be further improved by means of controlling the fiber dry substance concentration in the external enzyme reaction tank.

Improved thermally inhibited starch is disclosed and methods of making such starch are disclosed. In some embodiments a thermally inhibited starch has improved whiteness and flavor. In some embodiments a method for making a thermally inhibited starch includes providing adding a buffer and an acid to a starch to obtain a pH adjusted starch having an acidic pH and thermally inhibiting the pH adjusted starch. The technology further pertains to methods of making the thermally inhibited starch in batch, continuous, continuous-like process or combinations thereof.