Читать книгу Dry Beans and Pulses Production, Processing, and Nutrition онлайн

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Generally, beans are stored in silos or steel bins at the local elevator (ssss1) and are continually (and often continuously) monitored for storage stability prior to shipment. During severe weather changes in temperate climates, significant temperature gradients form within the bin or silo and, thus, moisture migration may occur within the beans. Therefore, it is important to provide continuous aeration (Navarro et al. 2012), to ensure that the beans are not molding or producing heat, and subsequently being damaged or developing musty off‐odors or off‐flavors.

Dry beans are conveyed to large storage silos or steel bins for interim or long‐term storage prior to additional cleaning. The central elevating system lifts beans from the receiving pit and deposits them on conveyors in order to fill the bins. Within each bin is a device termed a “bean ladder” that will enable beans to slide in a circular path to the bottom of the bin, thus minimizing seed coat damage. It is a general practice to monitor the moisture content within the silo and use airflow from the bottom of the bin proceeding through the beans and exiting either at the top or the bottom of the bin to improve equilibration and distribution of moisture. Beans are then subjected to density separation using a gravity table. Beans are screened for size, sorted for color using an electronic eye system, and finally, stored in silos or bins prior to packaging in bags or totes, or directly shipped in bulk rail cars or trucks for delivery (Sacklin 1985; Rodiño et al. 2011).