Avaliação de um sistema híbrido de tratamento de águas: membrana cerâmica de microfiltração com resina trocadora iônica.

Abstract

Due to the degradation of water resources and the increasing concern about specific microorganisms in water, the use of ceramic membranes for separation of contaminating materials, becomes a treatment option for the production of drinking water, due to reasons such as its resistance to chemicals, requires a smaller area of equipment construction, greater energy savings, among others. This study investigated the performance of a hybrid system consisting of a tubular microfiltration ceramic membrane, filled with ion exchange resins for substandard water treatment. The membranes used in this work are the α-alumina type (α-Al2O3), with pores which have a nominal diameter of about 0.8 microns produced by Laboratório de Membranas Cerâmicas (LABCEM), at Desalination in Reference Laboratory (LABDES) at the Federal University of Campina Grande (UFCG). The system was evaluated by the flow and permeate flow, the operating pressure 0.5; 1.0; 2.0 and 3.0 bar; presence / absence and bacteriological count tests in the feed and permeate water for the system: ceramic membrane; Physical and chemical analysis for the system: ceramic membrane / RTI; and hydraulic residence time (τ), at the operating pressures of 1.0; 2.0 and 3.0 bar. The ceramic membrane completely removed the Total and fecal (Escherichia coli) Coliform of the water. The permeate flux behavior varied with the operating pressure. In the hybrid system: ceramic membrane / RTI residence time was 15.55 seconds at the operating pressure of 1.0 bar by removing 71.9% of the feed water ions, to 66% at 2.0 bar pressure ( = 11.73 seconds), and 61% for the 3.0 bar ( = 10.11 seconds). The hybrid system was efficient in the removal of physical and chemical parameters and produced good quality treated water as for the bacteriological parameters in lower quality water with low power consumption.