**2.4.4 Double skin sheet reactor (DSSR)**

226 Studies on Water Management Issues

Fig. 2. A TFFBR installed at the PSA in Spain (Bockelmann et al., 1995)

collected from a variety of industrial companies (Bahnemann, 2004).

**2.4.3 Compound parabolic collecting reactor (CPCR)** 

Fig. 3. Schematic view of the reflector of a CPCR

The TFFBR was tested during its operation at the PSA. The efficiency of the performance of the TFFBR was found to be higher than that of the PTR during several test campaigns utilizing both model pollutants dissolved in pure water and real wastewater samples

The compound parabolic collecting reactor (CPCR) is a through reactor without any solar concentrating properties. The major difference between the PTR and CPCR is the shape of their reflecting mirrors. The reflector of a PTR has a parabolic profile and the pipe is The double skin sheet reactor is a new kind of reactor which does not have a light concentrating properties. It is a flat and transparent structured box made of PLEXIGLAS® (Van Well et al., 1997). PLEXIGLAS® is a trademark of a commercialized Poly(methyl methacrylate) (PMMA) which is a transparent thermoplastic. The inner structure of the DSSR is depicted in Fig. 4. The suspension of the model pollutant and the photocatalyst is allowed to flow through these channels. The DSSR can use both the diffuse and direct portion of the sunlight.

Fig. 4. A schematic view of the inner structure of a DSSR
