Бурение грунтовых зондов, установка энергетических колодцев

There are a number of dehydration methods that can be used for dehydration of approximately 90% hydrous ethanol leaving the conventional distillation unit to 99.5% fuel grade ethanol. These methods are basically divided into three groups:

1. Adsorption methods

2. Distillation methods — mainly azeotropic and extrac­tive distillations

3. Membrane-based methods

In azeotropic and extractive distillations a third component is added to the ethanol-water mixture that helps to break the ethanol — water azeotrope, and these methods are mostly used in older etha­nol plants. Adsorption-based methods are a more energy efficient alternative to distillation-drying methods. This method is more popular in current corn — and sugarcane-based first generation etha­nol plants. Membrane-based pervaporation is another technique mostly under development as an ethanol dehydration method.

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