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The moisture content of grains is an essential property in food storage. The moisture content that is safe for long-term storage is 12% for corn, sorghum, rice and wheat and 11% for soybean [1] At a constant relative humidity of air, the EMC will drop by about 0.5% for every increase of 10 °C air temperature. [2]
Equilibrium moisture content point is the point when grain no longer losing or gaining water when contacting with drying air. The final moisture content of the grain is up to the amount of moisture in the drying air, which is the relative humidity. The low relative humidity means air is dry and it has a large potential of picking up water.
Also, moisture content plays an important role, the lower the water present in the grain mass, the higher the mortality, due to the desiccation effect on insects by low O 2 and high CO 2,. [ 9 ] [ 10 ] All methods described previously are equally applicable because all ensure that oxygen which would otherwise by insects is totally depleted to ...
The product moisture content is then constant at the "equilibrium moisture content", where it is, in practice, in equilibrium with the dehydrating medium. In the falling-rate period, water migration from the product interior to the surface is mostly by molecular diffusion, i.e. the water flux is proportional to the moisture content gradient.
Wheat grain, when harvested, typically has a moisture content of 10–12%. In most countries, moisture content is not part of the grading system, but it is the most important factor affecting the quality of wheat grain, hence [clarification needed] is inversely related to dry matter loss. [6] Moisture content is important in wheat quality because:
Moisture sorption isotherm. The relationship between water content and equilibrium relative humidity of a material can be displayed graphically by a curve, the so-called moisture sorption isotherm. For each humidity value, a sorption isotherm indicates the corresponding water content value at a given temperature. If the composition or quality ...
The amount of moisture that remains in the wood at this stage is in equilibrium with water vapour pressure in the ambient space, and is termed the equilibrium moisture content or EMC (Siau, 1984). Because of its hygroscopicity, wood tends to reach a moisture content that is in equilibrium with the relative humidity and temperature of the ...
The conversion rate of grains to ethanol and distillers grains varies with the different types of grains and the process used. The details are outlined below: The conversion rate of maize to distillers grains is: One tonne of maize produces 378 L of ethanol and 479 kg WDG (70% moisture content), or 309 kg of DDGS (10% moisture content).