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ARS Home » Pacific West Area » Albany, California » Western Regional Research Center » Healthy Processed Foods Research » Research » Publications at this Location » Publication #341028

Research Project: New Sustainable Processing Technologies to Produce Healthy, Value-Added Foods from Specialty Crops

Location: Healthy Processed Foods Research

Title: Rice milling

item Yadav, Biond - Indian Institute Of Food Processing Technology
item Khir, Ragab - University Of California
item Pan, Zhongli

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 5/1/2018
Publication Date: 6/20/2018
Citation: Yadav, B.K., Khir, R., Pan, Z. 2017. Rice milling. In: The Science and Engineering of Rice. Pan, Z., Khir, R., editors. Lancaster, Pennsylvania: DEStech Publications, Inc. 283-344.

Interpretive Summary: Rice milling is of great economic importance to the rice industry. The degree of milling has direct effect on the acceptance of consumers on the milled rice. The milling process can affect quality and economic value of rice in many aspects. For example, broken rice is attributed primarily to the milling operation. Broken rice is worth about ½ that of whole rice. This chapter includes five sections discussing the rice milling operation. It implies concept of the milling operation, methods of milling, factors affecting rice milling outturn ratio, and effect of milling on quality of milled rice.

Technical Abstract: Rice is unique among cereals and is typically consumed after dehusking and polishing processes. Rice contains roughly one-fifth its weight as husk that is inedible and must be removed through dehusking process. The resulting grain is called brown rice (or dehusked rice) which has bran layer which prevents its easy cooking in boiling water. This layer also therefore needs to be removed at least partially by a process of abrasion and this process being called whitening or simply polishing. The entire process including, dehusking and polishing of producing milled rice or white rice from paddy is also referred to by the name milling. The milling has profound effect on the quality of milled rice and its economic value. Hence, the priority of the rice milling industry is to maximize the quantity and enhance quality of milled rice with the preferred level of kernel whiteness. This chapter discusses the rice milling process from different angles staring with definition of rice milling and ending with effect of milling process on quality of milled rice.