Finally, a very low release of Ti was measured, less 1 mg/kg, during the leaching test of ashes vitrified with glass cullet and feldspathic inert. The characterization of ashes showed that TiO2 nanoparticles reacted during the incineration to give calcium titanate. From our incineration lab-scale experiment, we did not observe a release of TiO2 nanoparticles into the atmosphere, and Ti was attached to the surface of obtained solid residues (i.e. The obtained ashes were also vitrified with additives and the release of Ti was finally evaluated by leaching test. Solid paint debris with and without TiO2 nanoparticles were treated in a lab scale incineration plant at 950Â☌ (combustion temperature) and in oxidizing atmosphere. In this work, we investigated the behavior of TiO2 nanoparticles from incineration of solid paint waste containing these particles. Although first studies were performed to investigate the release of nanoparticles from use phase, very few data are available on the potential release from recycling or disposal of nano-enhanced products. In order to assess the potential impacts posed by products containing engineered nanoparticles, it is essential to generate more data about the release of these particles from products' life cycle. Massari, Andrea Beggio, Marta Hreglich, Sandro Marin, Riccardo Zuin, Stefano This work intends to show that a reliable determination of the membranes performances based on RT-PCR analytical method can be achieved during the operation of the UF units.īehavior of TiOâ‚‚ nanoparticles during incineration of solid paint waste: a lab-scale test. For tests conducted on virgin membrane, a good consistency was observed between lab and pilot scale results with the two analytical methods used. Preliminary tests at lab scale showed that both methods can be used interchangeably. PFU culture method was compared to RT-PCR method for the calculation of LRV in both cases.
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Membrane performances were evaluated during pilot trial and compared to the results obtained at lab scale with fibers taken from the pilot plant modules. In the present work, the protocol for monitoring membrane performance was transferred from lab scale to pilot scale.
In previous studies, an effective method (MS2-phage challenge tests) was developed by the Water Research Center of Veolia Environnement for the measurement of the virus retention rates (Log Removal Rate, LRV) of commercially available hollow fiber membranes at lab scale. The determination of the virus retention capabilities of UF units during operation is essential for the operators of drinking water treatment facilities in order to guarantee an efficient and stable removal of viruses through time. Humbert, H Machinal, C Labaye, Ivan Schrotter, J C Virus removal retention challenge tests performed at lab scale and pilot scale during operation of membrane units.
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