Search results for "MICI"
showing 10 items of 1671 documents
Synthesis and characterization of magnesium compounds recovered from exhausted brines.
2023
Electrochemical Processe s and Apparatuses for the Abatement of Acid Orange 7 in Water
2014
We have studied the electrochemical treatment of aqu eous solutions contaminated by Acid Orange 7 (AO7) by electro-Fenton process (EF). The main object ive was to evaluate how the electrochemical route affects the performances of the d egradation process. EF process was carried out in a number of very different reactors: conventional bench scale electrochem ical cell, microfluidic electrochemical reactor, microbial fuel cell and stack for reverse electrodialysis processes. The utilisation of micro devices allowed to work without the addition of a supporting elec trolyte and improved the performances of EF. Microbial fuel cell did not need the supply of electric energy bu t our device requir…
Reverse electrodialysis: advanced modelling and scale-up
Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspec…
2020
This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and othe…
Energetic Valorisation of Saltworks Bitterns via Reverse Electrodialysis: A Laboratory Experimental Campaign
2023
Concentrated bitterns discharged from saltworks have extremely high salinity, often up to 300 g/L, thus their direct disposal not only has a harmful effect on the environment, but also generates a depletion of a potential resource of renewable energy. Here, reverse electrodialysis (RED), an emerging electrochemical membrane process, is proposed to capture and convert the salinity gradient power (SGP) intrinsically conveyed by these bitterns also aiming at the reduction of concentrated salty water disposal. A laboratory-scale RED unit has been adopted to study the SGP potential of such brines, testing ion exchange membranes from different suppliers and under different operating conditions. M…
Optimization of the performance of an air–cathode MFC by changing solid retention time
2017
BACKGROUND This work is focused on the optimization of the performances of air-cathode microbial fuel cells (MFC) by changing the solid retention time (SRT) of the suspended biomass culture. RESULTS Five MFCs inoculated with activated sludge obtained from a municipal wastewater treatment plant were fed with a highly-concentrated acetate solution (10 000 ppm COD) and operated over two-month tests in order to determine how SRT may influence the performances of the bio-electrogenic cells. The MFC operated at SRTs of 2.5 days was found to outperform the other cells, operated at SRT of 1.4, 5.0, 7.4 and 10.0 days. In order to evaluate the possibility of using SRT as a manipulated parameter for t…
CFD Predictions of Sufficient Suspension Conditions in Solid-Liquid Agitated Tanks
2012
Abstract Most research efforts on mechanically agitated solid-liquid contactors have been devoted to the assessment of the minimum impeller speed for complete off-bottom suspension, N js . Actually, many industrial vessels are operated at impeller speeds slightly lower than N js (Oldshue, 1983; Rieger et al., 1988). This suggests that the sufficient suspension condition, which is quantitatively specified in this paper by introducing a suitably defined quantity N ss , may represent a valid alternative to that of complete suspension. In the present work time-dependent RANS simulations were carried out with the aim of predicting the achievement of sufficient suspension conditions. The Eulerian…
A novel fluid-structure 2D modelling tool for the assessment of membrane deformation effects on electrodialysis units performances
La liberalizzazione del licenziamento economico: politica costituzionale, legge, giurisprudenza
2021
Il saggio analizza i recenti sviluppi legislativi e giurisprudenziali in materia di licenziamento per giustificato motivo oggettivo, sotto la duplice prospettiva degli elementi costitutivi della fattispecie e della tecnica di tutela: a seguito degli interventi di legge del 2012-2015, e della giurisprudenza della Cassazione e della Corte costituzionale, il quadro normativo di riferimento è stato profondamente liberalizzato, e riflette una scelta di politica costituzionale privilegiante la libera iniziativa economica privata rispetto all’utilità sociale e al diritto al lavoro. Infine, l’articolo si sofferma sul recente ‘blocco’ dei licenziamenti economici, sottolineando come la misura rappres…
UNA NUOVA FISIONOMIA GIURIDICA PER I GESTORI DEI PORTI ITALIANI. O FORSE DUE? SULLA DISTANZA DI APPROCCIO TRA IL D.LGS. N. 169 DEL 2016 E IL REGOLAME…
2017
L'articolo descrive l'interpretazione offerta dalla giurisprudenza e dalla dottrina italiana alle trasformazioni dell'ordinamento portuale (e, in particolare, degli enti portuali) intervenute a far data dalla l. n. 84/1994. L'autore evidenzia come l'opinione prevalente - che ha qualificato le Autorità portuali italiane alla stregua di enti pubblici non economici, dotati di funzioni regolatorie - strida con l'inquadramento in termini di impresa dato agli enti gestori dei porti degli Stati membri, in una molteplicità di occasioni, dalle istituzioni europee. Questa biforcazione di letture (testimoniata anche dall'ultima stagione della legislazione italiana ed europea) non è giustificata dai tr…