Environmental Engineering Reference
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photocatalyst and reactant fluid. Inclined plate collector (IPC) is another
solar collector where all of the above parameters are properly addressed.
In IPC, the photocatalysts are supported on the inclined plate and the
reactant fluid flows through the catalyst allowing the transfer of photon to
photocatalyst via reactant fluid. IPCs do not include any photon concen-
trator or reflective surface and the design is pretty simple. Some research-
ers have used the term thin-film fixed-bed reactor (TFFBR) instead of IPC
[22,26]. Roselin et al. [26] discussed the use of ZnO mediated photocata-
lytic degradation of reactive dye 22 in a TFFBR under solar radiation. They
reported almost complete mineralization of the dye along with the forma-
tion of NO 3 - , SO 4 2- and NH 4 + ions. Another simple solar photoreactor setup
known as double skin sheet (DSS) reactor has shown better performance
compared to TFFBR [22]. Arslan et al. [27] performed a comparative study
with two different photoreactors (TFFBR and DSS) and three commercial
TiO 2 (Degussa P25, Millennium PC 500 and Sachtleben Mikroanatas) for
the degradation of simulated dyehouse effluent. Degussa P25 was reported
as the best photocatalyst and DSS reactor offered better efficiency even
under a lower UV-A dose. Diagrams of the three solar reactors are pre-
sented in Figures 4.3-4.5 [28,29].
4.6
Dependence of Dye Degradation on Different
Parameters
The photocatalytic degradation of several dyes (acid orange 7, reac-
tive blue 4, red 120, acid brown 14, methylene blue, remazol brill blue R,
Figure 4.3 Compound Parabolic Collector Reactor (Copyright 2005 Elsevier) [28].
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