Filtration
Hobrafilt NT Series
Characteristic
Hobrafilt® filter sheets of the “NT” series were especially developed for economic use during filtration in the beverage, chemical and pharmaceutical industries. The sheet thickness and composition were designed to remove impurities during filtration from a typical production batch so that the sheets have the filtration capacity required for the given filtration. This practically eliminates the unused capacity of sheets and increases efficiency. In case of a high concentration of impurities, we recommend consulting the use of Hobrafilt® filter sheets of the “NT” series with our specialists.
Applications
Wine
Beer
Alcoholic beverages
Soft drinks
Food
Chemistry, Biochemistry and Cosmetics
Pharmacy and Biotechnologies
Industrial Oil and BiofuelAre you interested in this product
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Filtration mechanism
Three different filtration types as specified below are applied in the filtration process over filtersheets. In practice, normally, none of the three filtration mechanisms occurs separately during filtration due to the wide range of particle size but they are more or less combined, which is decisive for the filtration result.
Mechanical filtration
Direct filtration of foreign substances. All particles greater than the filtersheet holes are captured mechanically on its surface.
Electrostatic adsorption
Light molecular interactions, Van der Waals forces, occurring among the particles of solutions and the filtersheet material and ensuring that particles smaller than the dimensions of the sheet's inner pores are captured in the little chambers and channels of the filtersheet.
Electrokinetic adsorption
This is based on the existence of Zeta potential and is applied in microbiologically effective sheets. Excellent filtration/separation effects towards negatively charged particles of dirt, microorganisms and viruses suspended in the liquid being filtered are achieved through the change of the naturally negative electrokinetic charge of the filtersheet to positive - i.e. Zeta potential. This is achieved by a special treatment with polyelectrolytes that are not harmful to health. This treatment makes it possible to capture particles up to ten times smaller than the dimensions of the filtersheet pores.