Combined Photo-Biochemical Reactor for the Destruction of Organic Pollutants in Water
A new type of a hybrid photocatalytic reactor, working under the combined natural solar and artificial UV-irradiation, and a biochemical aerobic reactor with floating package with fixed microflora are described. The destruction process can be performed either under homogeneous conditions when Fenton's reagent based on iron trioxalate and hydrogen peroxide was used as catalyst, or under heterogeneous conditions, when dispersed TiO2 with an anatase structure was applied. It was synthesized by electrochemical dissolving of Ti anodes in alkaline medium under application of periodic current with regulated impulse. Titanium hydroxide thus formed was annealed under the special regimes so as to reduce the probability of ruthil and brukite formation. The two-stage photocatalytic and biochemical treatments of benzothiazoles-containing solutions were studied, dependent on the oxidant and dispersed TiO2 concentration. Theoretical aspects of this problem are discussed.
Keywordsphotocatalytic reactor benzothiazoles dispersed TiO2 heterogeneous catalysis
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