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Toulouse, France

Causserand C.,University Paul Sabatier | Pierre G.,University Paul Sabatier | Rapenne S.,Veolia | Schrotter J.-C.,Veolia | And 2 more authors.

Previous studies have shown that the absolute membrane cut-off and the value quoted by the manufacturers may be very different because of differences in methodologies and testing conditions. The origin of this discrepancy is often difficult to identify as the characterization method used by the membrane manufacturers is not specified. The goal of this study is to evaluate in terms of sensitivity, repeatability and reproducibility the methodologies used by a working group including membrane manufacturers, end-users and a research laboratory. The five selected membranes are hollow fibers used in drinking water production. They are made of various materials with different configurations (internal-external and external-internal type) and molecular weight cut-offs. Different types of tracers are used: dextrans, poly (ethylene glycol)s, poly(ethylene oxide)s, MS2 bacteriophage filtrated in single sized solution or in mixture. Results collected lead to a better understanding of the origin of discrepancies and allow to define the best operating conditions (tracer's type, working conditions range, data treatment methods,...) providing the most appropriate, accurate and reproducible testing protocol according to the selected application. © 2009 Elsevier B.V. All rights reserved. Source

Porcheron F.,French Institute of Petroleum | Ferre D.,French Institute of Petroleum | Favre E.,University of Lorraine | Nguyen P.T.,University of Lorraine | And 3 more authors.
Energy Procedia

Post combustion Carbon Capture and Storage technology (CCS) is viewed as an efficient solution to reduce CO 2 emissions of coal-fired power stations. In CCS, an aqueous amine solution can be used as a chemical solvent to selectively remove CO 2 from the gas stream. The gas/liquid contact is performed within an absorption tower consisting of a packed column over which the absorption liquid and gas are flowing counter currently. The large active area required for CO 2 mass transfer efficiency from the gas into the liquid induces the use of large absorption tower, which drastically increases the cost of the process. An alternative technology to packed column is using hollow fibers membrane contactors (HFMC) as they offer attractive potentialities for intensified gas absorption processes. This holds especially for post combustion CO 2 capture application, for which a significant decrease of the size of the absorber or stripper unit could be of great interest. The aim of this work is to identify a suitable membrane material through lab-scale measurements to design a pilot-scale hollow fiber membrane contactor module. © 2011 Published by Elsevier Ltd. Source

Quesada I.,CNRS Chemical Engineering Laboratory | Gonzalez Y.,CNRS Chemical Engineering Laboratory | Schetrite S.,CNRS Chemical Engineering Laboratory | Budzinski H.,University of Bordeaux 1 | And 8 more authors.
Revue des Sciences de l'Eau

Within the framework of the ANR project “Panacea”, we monitored the performance of a Membrane Bioreactor (BaM) in Purpan hospital (hematology department, Toulouse). The three aims of this project were: i) the identification and the quantification of molecules, used in cancer therapies, in the effluents of the corresponding departments; ii) the measure of biological effects (eco- / géno- / cyto-toxic and endocrine disruptors); and iii) the development of a treatment process consisting of a combination of biological and physicochemical treatments. The sampling protocols and the results of the physicochemical analyses are presented, as well as the quantification of 125 pharmaceutical molecules, allowing us to describe the variability of the hospital effluent. From the treatment point of view, the BaM was operated with an effective sludge retention time of 40 days and the study consisted of estimating the effect of the hydraulic residence time (HRT), the other parameters being equal. Two campaigns were carried out for HRT = 24 and 48 h. The observed differences are not necessarily attributable to the different HRTs. From a hydraulic point of view, the observed filtration performances are satisfactory, considering the operating conditions (no back-flushing, sequential filtration). The quality parameters of the treated water meet the discharge standards. The quantitative chemical analyses show very variable removal of the pharmaceutical molecules during the BAM treatment, ranging from total elimination to the “production” of molecules, suggesting the operation of decomplexation phenomena. On the same samples, a battery of ecotoxicity tests was applied. These tests showed a great lowering of the global ecotoxicity. A partial conclusion on the relevance of the BaM treatment is proposed. © 2015, Institut National de la Research Scientifique. All rights reserved. Source

Polymem | Date: 2011-08-16

Membrane apparatus and machines for treating liquid or gaseous fluids, namely, equipment for water treatment or other liquids in the nature of filtration units and demineralization or desalination units, equipment for gas treatment in the nature of gas separation or membrane contactors.

A water filtration module (

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