A comparison of prototype compound parabolic collector-reactors (CPC) on the road to SOLARDETOX technology

Abstract

Solar photocatalytic detoxification of non-biodegradable chlorinated hydrocarbon solvents (NBCS) is carried out in different concentrating and non concentrating devices using TiO2 as a photocatalyst fixed on the inner surface of the reaction tubes or as a slurry catalyst which has to be removed from the treated water. The reaction is most effective using 200 mg/l of TiO2 as a slurry in a non concentrating CPC reactor. The concentrating parabolic trough reactor has a poor activity because of its minor irradiated reactor surface. Catalyst coated glass tubes are less efficient then the used slurry catalyst. Their advantage is that no catalyst has not to be removed from the treated water and there is no loss of activity during treatment. Yet their physical stability is not sufficient to be competitive to the slurry catalyst. Nevertheless the degradation results are very promising and will possibly lead to commercial applications of this technology.

Treatment of Hazardous Organic and Inorganic Compounds through Aqueous-Phase Photocatalysis: A Review

“…Funken et al 108 worked on the solar photocatalytic detoxification of nonbiodegradable chlorinated hydrocarbon solvents (NBCSs) in different concentrating and nonconcentrating devices using TiO 2 as the photocatalyst either fixed on the inner surface of the reaction tubes or in a slurry. They suggested that the reaction was most effective using a TiO 2 concentration of 200 mg/L as a slurry in a compound-parabolic-concentrator reactor.…”

Characterization and Evaluation of the Efficiency of TiO2/Zinc Phthalocyanine Nanocomposites as Photocatalysts for Wastewater Treatment Using Solar Irradiation

“…This reactor is similar to the SOLARDETOX prototypes used at the Plataforma Solar de Almería and the German Aerospace Center, Cologne [38,39], but the mirrors were calculated exclusively for this reactor and the ratio between irradiated surface and dark tubing is higher. Since the BRITE EURAM SOLARDETOX project CPC-type reactors are known as very powerful solar reactors for water treatment up to a pilot plant scale [38,39].…”

Paper mill wastewater detoxification by solar photocatalysis

“…Different solar driven CPC type reactors with 5 l and 60 l volume were used for degradation tests (Funken et al, 2001) as well as UV-lamp driven reactors with a volume of 0.8 l to 5 l and a power consumption between 150 W and 1,000 W. The tests were compared to define advantages and disadvantages of both reactor types especially for the use in a sunny region like Minas Gerais or São Paulo.…”