ABSTRACT Several decades ago serious contamination of the soil and groundwater occurred in Hidas, Hungary, due to the non-proper deposition of large amount of chlorobenzene wastes. To defend the drinking water basin of the area a depression method is used and the groundwater pumped up is purified by a UV oxidation lamp reactor, which operates at its full capacity. To make possible to increase the load on the lamp reactor, the development of a pre-purification system, a combined solar photocatalytic/stripping reactor has been developed on pilot plant scale for testing and optimisation. The main features of this reactor are: (a) Daytime, in the presence of anatase-TiO2 catalyst, it operates as a solar photocatalytic reactor utilizing the solar UV radiation for the mineralization of chlorobenzenes. (b) The integrated stripper works day and night and serves for the removal of chlobenzenes by air purging. Air flows counter-currently with the water film, and chlorbenzenes removed by the air flow are oxidized in a catalytic air cleaning reactor. (c) Daytime the reactor functions also as a solar collector, resulting in increased water temperature and therefore, a significant acceleration of the stripping process.
FOTO-OSSIDAZIONE AD ENERGIA SOLARE DI ACQUE INQUINATE DA ORGANO CLORURATI
FLORIS, FRANCESCO
2005-01-01
Abstract
ABSTRACT Several decades ago serious contamination of the soil and groundwater occurred in Hidas, Hungary, due to the non-proper deposition of large amount of chlorobenzene wastes. To defend the drinking water basin of the area a depression method is used and the groundwater pumped up is purified by a UV oxidation lamp reactor, which operates at its full capacity. To make possible to increase the load on the lamp reactor, the development of a pre-purification system, a combined solar photocatalytic/stripping reactor has been developed on pilot plant scale for testing and optimisation. The main features of this reactor are: (a) Daytime, in the presence of anatase-TiO2 catalyst, it operates as a solar photocatalytic reactor utilizing the solar UV radiation for the mineralization of chlorobenzenes. (b) The integrated stripper works day and night and serves for the removal of chlobenzenes by air purging. Air flows counter-currently with the water film, and chlorbenzenes removed by the air flow are oxidized in a catalytic air cleaning reactor. (c) Daytime the reactor functions also as a solar collector, resulting in increased water temperature and therefore, a significant acceleration of the stripping process.
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