Abstract:Coupling with the technology of photocatalysis and organic membrane separation

a new type of three-phase fluidized bed recycle reactor equipment of photocatalysis-organic membrane separation was designed

and the TiO2 distribution properties in the recycle reactor equipment

which the average diameter is 0.22 μm

were investigated. The results show that TiO2 suspension concentration in the membrane separator is much lower than that in the photocatalytic reactor. As the aeration flux in the bottom of the photocatalytic reactor and the TiO2 dosage are fixed

the equilibrium concentrations of TiO2 suspension remain constant

and the optimal values of the dosage and the flux are 82.50 g

1.00 m3/h respectively. The water rinsing in the recycle pipe makes the TiO2 suspension concentrations invariable

and the best rinsing time intervals is 60 min. The TiO2 suspension concentration with the 6.50 mm of connecting pipe diameter is lower than that of the 20.00 mm in the membrane separator. The membrane effluent has very small influence on the TiO2 distribution properties.