Two hollow-fiber ultrafiltration membrane modules of the waste-water treatment facilities of a cosmetics company were analyzed to investigate the causes of membrane damage and rapid fouling of the membranes. This autopsy consisted of visual inspection of the membranes and the module, a bubble-point leak test, tensile strength tests and characterization...
This article deals with water removal from oil-in-water emulsion by an ultrafiltration membrane at different transmembrane pressures. The membrane intrinsic resistance and gel resistance are analyzed and determined based on the resistance-in-series theory. The experimental results show that the effect of pressure on the permeate flux depends greatly on variations...
Application of membrane techniques (pervaporation and membrane-based solvent extraction) and adsorption to the removal of phenol from solutions modeling wastewater from phenol production by cumene oxidation process was investigated. The transport and separation properties of composite membranes PEBA, PERVAP 1060 and PERVAP 1070 in pervaporation of water-phenol mixtures were determined....
The main objective of this work can be specified in three steps as follows: develop a computer program as a general model for any type of RO system, predict plant performance as a function of time (8 months of operation), and perform comparative studies on the performance of the two...
It has been seen that a replacement roof costs more; a recover may not last. Too often, roof replacement comes as a surprise because there are no regular maintenance programs in place; and it always seems to happen when money is least available. One option is recovering an existing...
Organic acids are increasingly used for various industrial applications. Bipolar membrane electrodialysis EDBM can be used to achieve the conversion of the acid salt into its acidic form. Its introduction in replacement of precipitation can significantly lower the environmental impact of the process. This paper is focused on the modeling...
Nanofiltration systems are generally cleaned chemically. The optimal choice of the cleaning agent is a function of membrane material and foulant in a complex manner. This study evaluated the cleaning efficiency and effects of several cleaning agents on NF255 nanofiltration membrane. On the basis of the cleaning chemical analysis, the...
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