Optimizing Dehulling Quality in Barnyard Millet Through Pre-processing Techniques

Minor millets, with their small size and hard husk, pose challenges in dehulling that affect overall yield and utility. Pretreatment methods were employed to facilitate more efficient dehulling.

The current study was undertaken to assess the dehulling efficiency and evaluate the impact of various pre-treatments on the spatial and functional properties of barnyard millet (Echinochloa crusgalli L.). The grains were subjected to abrasive dehulling [A] for 2[A2], 4[A4], or 6[A6] minutes followed by centrifugal dehulling and the efficiency indices were calculated.

A2 and A4 samples exhibited superior milling efficiency and whole kernel recovery reflecting better grain integrity after processing. The A6 treatment resulted in highest head rice yield with intact grains whereas the control has lower retention and reduced dehulling performance. Spatial analysis of the grain revealed that A4 has the largest grain dimensions compared to other samples. Functional property evaluation indicated that A6 had the highest water holding capacity and swelling power making it ideal in developing rehydrated formulations, A4 was more appropriate for processed foods applications, A2 has good hydration properties, while the control sample was best suited for snack preparation. Among the pre-treated samples A2 sample was reported significantly dominant among the other pre-treated samples.