Objetivo
As a result of past reprocessing campaigns performed in the EUREX pilot plant, about 26 m{3} of spent solvent were produced. Taking into account the difficulty to process this waste type (a mixture of tri-butyl-phosphate, tri-capryl-amine, kerosene and methyl-benzenes) according to existing technologies, this research activity aims at setting-up a suitable treatment process capable of reaching three major objectives:
- reduction of the waste volume by a factor at least equal to 10;
- oxidative destruction of the reduced volume waste;
- compatibility of the processed waste with conventional immobilisation matrices like cement.
For the specific purpose, it is intended to investigate the potentialities of the combination of distillation with wet oxidation.
The feasibility of distillation as a method drastically to reduce the volume of radioactive solvent waste (a mixture of tri-butyl-phosphate, tri-capryl-amine, kerosene and methyl benzenes) has been demonstrated. More than 88% of the solvent waste can be distilled with a negligible rising of the activity, so that the top product of the of the distillation can be conventionally incinerated according with the environmental radioactivity receptivity.
The bottom residue needed for wet oxidation hot laboratory experiments has been produced. A section of the cold technological hall of the EUREX plant has been modified for the cold bench scale wet oxidation experiments.
Work programme:
The work programme includes the following tasks:
- Conduction of laboratory scale distillation tests with genuine waste from the EUREX plant in order to optimize the operating parameters to get a DF of the top fraction which satisfy incineration criteria in conventional plants
- Wet oxidation experiments at laboratory scale and at bench scale. These experiments will involve processing of 3-5 litres batches of inactive simulated waste in order to quantify the scaling-up effect and to optimise the process parameters which enable a minimisation of the final aqueous waste volume.
- Conduction of cementation tests using ordinary Portland cement (possibly with inorganic additives) on the inactive aqueous waste coming from the wet oxidation bench-scale experiments.
- Preliminary design of a full scale treatment plant for reprocessing the whole stock of the EUREX solvent waste, including the distillation section, the wet oxidation section and the interface with the cementation plant.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural.
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural.
- ingeniería y tecnologíaingeniería ambientalenergía y combustiblescombustibles líquidos
- ciencias naturalesciencias químicaselectroquímicaelectrólisis
- ingeniería y tecnologíaingeniería químicatecnologías de separacióndestilación
- ingeniería y tecnologíaingeniería ambientalgestión de residuosprocesos de tratamiento de residuos
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Convocatoria de propuestas
Data not availableRégimen de financiación
CSC - Cost-sharing contractsCoordinador
13040 Saluggia (Vercelli)
Italia