ES426744A1 - Method and apparatus for dehydrating the mud. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Method and apparatus for dehydrating the sludge having a dry content of less than 30% and having, depending on its origin, variable characteristics, within an area through which the sludge to be treated is passed through less an endless belt element permeable to liquid from one end of the zone, in which the sludge to be dewatered is supplied, to the other end thereof, where the dehydrated sludge is discharged, and in which, with a view to electro-endosmosis, a direct electric current is passed through the sludge between electrodes, in a direction transverse to the direction of movement of the sludge, while the latter is simultaneously subjected to pressure, whose method is characterized in that it is supplied to said zone a sludge conditioned by the use of a polymer flocculant, being subsequently transported by means of said endless belt element permeable to liquids, being dehydrated the sludge conditions firstly to the consistency that allows manipulating it with a shovel with/without the use of subatmospheric and/or superatmospheric pressure, then dehydrating it more intensely by passing it in the form of a layer for a space of no more than 3 1/2 minutes between electrodes with a view to electro-endosmosis, applying a voltage difference through the mud layer by the passage of said direct current through the mud layer. (Machine-translation by Google Translate, not legally binding)