The quality and cost of incoming paddy rice are two of the most important factors to understand for a modern rice mill. In most instances the price paid is directly correlated to the quality of the incoming raw material.
Factors such as kernel size, colour and chalkiness are critical parameters in the assessment of quality. Even today manual testing is the prevailing method for making such quality assessments. This manual testing relies on trained and highly experienced technicians reviewing samples kernel by kernel to make judgements that are subjective and can vary greatly between technicians. In fact, studies have demonstrated that this variation can be as high as 20%.
The Challenges: 375,000T Mill in Jiangxi Province, PRC
Data from a large, modern rice mill in Jiangxi Province in China, highlights some of the challenges faced by most if not all rice mills around the World today.
The primary issue faced in IQC is the fact that bulk rice deliveries are not typically homogenous. More often than not there are varying degrees of mixed rice varieties in any given delivery. These variations in the type and mix of rice types being delivered directly affect the quality of the final milled product due to differing levels of broken kernels, differing colours and different baseline kernel sizes. Indeed, colour is often a good indicator of the storage conditions that rice has been subjected to prior to delivery. As a re