Electrobaromembrane apparatuses: Classification and particular application for wastewater treatment

Abstract

The aims of this work are developing the electrobaromembrane apparatus classification and study of the particular case of electrobaromembrane process application for wastewater treatment in engineering industries. The multilevel classification of electrobaromembrane processes, which takes into account several factors at once, is proposed. A particular case of electrobaromembrane process application for treatment of the galvanic solution produced by JSC "Zavod Tambovpolimermash" is studied in this work. The research was carried out on the experimental electrobaromembrane plant with flat chambers. In addition, some approximation functions and their numerical values of empirical coefficients were obtained for experimental data of the specific flow and the retention factor of membranes OPMN-P and AMN-P. The result comparison of nanofiltration and electronanofiltration processes shows that the permeability of the solution through the membrane pores increases when a constant electric current density is applied to the test system. During nanofiltration, process membranes are compacted due to the overpressure increase. This directly affects the driving force of the membrane separation process for a particular type of solution, thereby the retention factor of porous membranes increases. Retention factor values do not differ a lot for certain types of ions. In contrast, electronanofiltration process is characterized by the selectivity of membranes with respect to a certain type of ions. The near-cathode OPMN-P membrane mainly passes thought itself the Zn2+ cations and holds the Cl- and SO4 2- anions, while the near-anode AMN-P membrane mainly passes thought itself the Cl- and SO4 2- anions and holds the Zn2+ cations.

Keywords

• membrane
• electrobaromembrane apparatuses
• separation
• wastewater
• classification