Normalização de sistemas de dessalinização via osmose inversa.

Abstract

The present work has as objective studies the normalization of two desalination systems via reverse osmosis, installed in the Riacho de Santo Antonio and Catingueira, both in the State of Paraiba, with feed water of 13.665 mg/L and 945 mg/L total of dissolved solids (TDS), respectively. Starting from the data of the variables of measures of the systems as; flow, pressure, temperature, conductivity and concentration, making a series of calculations to observe the peformance of the systems. The evaluate parameters were: flow of the permeate, net driving pressure (NOP), TDS of the permeate, salt passage and salt rejection and the mass transfer coefficient (MTC). After the normalization was accomplished a study of the scalings types that could be happening in the systems. The result for the system of Catingueira-PB was: decrease of 13% in the flow of the permeate; increase of 16% in NDP; increase in TDS of 48%; increase of 71% in the salts passage ; decrease of 30% in MTC and the calculations of scalings prevention indicated a tendency to the scaling of CaCCb and CaS04. The result for the system of Riacho de Santo Antdnio- PB was: decrease of 7% in the flow of the permeate; increase of 7% in NDP; increase in TDS of 34%; increase of 50% in the salts passage; decrease of 11% in MTC and the calculations of scalings prevention indicated a tendency to the scaling of CaCO;*.