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ARS Home » Pacific West Area » Albany, California » Western Regional Research Center » Healthy Processed Foods Research » Research » Research Project #431116

Research Project: Evaluation of Laboratory Scale Rice Milling

Location: Healthy Processed Foods Research

Project Number: 2030-41000-064-14-A
Project Type: Cooperative Agreement

Start Date: Jun 1, 2016
End Date: May 31, 2019

1- Investigate the agreement between commercial mill results and results from FGIS procedures using the approved sheller (Grainman Sheller No. 64 for southern production and Yamamoto Sheller FC2K for western production) and miller (Grainman Miller No. 65) for long grain, medium grain and short grain rough rice. This study will include conventional and hybrid cultivars. The rough rice samples will be collected from four representative commercial mills. 2- If significant differences in milling performance between commercial mills and the Grainman Miller No. 65 are identified via research objective 1 and if authorized by FGIS, investigate alternate procedures to align the Grainman Miller No. 65 more closely to commercial mill results.

This research will be conducted over a two-year period to obtain sufficient data from replications. The first year will focus on comparing the results of laboratory milling and commercial milling environments. The second year will focus on replication and, if authorized by the USDA, Federal Grain Inspection Service (FGIS), improvement and optimization of laboratory milling procedures to more closely align Grainman milling performance with that of commercial mills. Six major factors will be evaluated for comparing the milling results of laboratory milling and commercial milling environments. They are: • Rice types (long, medium, short grains) • Rice cultivars (conventional, hybrid cultivars) • Cultivation region (one west and two south regions) • Milling time (spring, summer, autumn, winter) • Milling site (location or milling environment) • Mill characteristics (across multiple commercial milling systems) To obtain replicated data, selected samples from the same sources will be collected and milled in the second year. For improving the laboratory milling procedures, all of the steps related to rice sample preparation and milling will be reviewed based on the results from the first year. If authorized by FGIS the selected factors/steps that need to be improved will be studied and optimized in the second year. Rice types and cultivars: Since different types of rice may have different milling characteristics for both laboratory and commercial milling environments, all three types of rice, long, medium and short grains, will be evaluated. Similarly, conventional and hybrid rice cultivars may have distinct milling properties and impacts on milling performance which will be considered in the study. Specific types and cultivars will be jointly identified by the project researchers and FGIS based on the popularity of specific varieties in selected regions. Cultivation region and site: Since the milling characteristics may vary due to extrinsic factors such as cultivation region, rice samples will be collected from rice millers at the two major rice production regions, western (California) and southern regions (Louisiana and Arkansas). Both rough and milled rice samples along with the related quality information will be collected from four commercial rice millers.