E. Kudlek, M. Dudziak, J. Bohdziewicz, G. Kamińska
Silesian University of Technology, Institute of Water and Wastewater Engineering, Gliwice, PL
REMOVAL OF MICROPOLLUTANTS IN THE LABORATORY MULTIFUNCTIONAL MEMBRANE REACTOR
Hybrid wastewater treatment systems based on advanced oxidation processes and membrane techniques are an alternative both to conventional water treatment systems and sequential systems based on deep-treatment processes. The paper presents the estimation of the removal rate of organic micropollutants from wastewater effluent at various phases of the photocatalytic laboratory multifunctional membrane reactor. The tested compounds belong to the group of polycyclic aromatic hydrocarbons - anthracene and benzo(a)pyrene, industrial additives i.e. pentachlorophenol and octylphenol, as well as pharmaceuticals – diclofenac. The treatment process was carried out without or with the addition of a catalyst in the form of commercial titanium dioxide. Reactor’s selected operating parameters allowed to remove over 72% of the tested micropollutants in the process carried out without catalyst. The addition of the semiconductor to the treated water solution allowed to remove completely all tested compounds. It has been shown that the ultrafiltration membrane acts not only as a separation barrier of the catalyst, but also allows for the retention of micropollutants, which removal rate ranged from 9% for pentachlorophenol to 98% for benzo(a)pyrene.
Keywords: membrane reactor, UV irradiation, wastewater effluent, micropollutants