Annual Report 2006 - Plataforma Solar de Almería

PLATAFORMA SOLAR DE ALMERÍA
Figure 4.10 Operation of the bioreactor after photo-
Fenton pretreatment. 250 mg l-1 Cibacron
Red FN-R with different H2O2 doses (a)
250 mg (a) 250 mg l-1, (b) 225 mg l-1,
(c) 200 mg l-1. 250 mg l-1 Procion Red H-
E7B with different H2O2 doses (d) 80 mg
l-1 (e) 65 mg l-1 (f) 50 mg l-1
Univ. of Barcelona (UB). Jordi Bacardit Peñarroya. Combined photochemical/biological
treatment of biorecalcitrant water. Study of change in scale and
control methods. In the laboratory (UB) experiments were designed to study
the influence of the most characteristic parameters of this process: hydrogen
peroxide dose, iron (FE 2+ ) dose and temperature. Based on the results, experiments
were designed at the PSA conforming to the conditions of interest
for study (Table 4.1). In this case, the temperature id not change and 4-
chloropenol (4-CP) was used. The strongest influence, as expected, is the
H2=2 dose. A large fraction produces more degradation and a better biodegradability
of the resulting degradation compounds. Furthermore, it was demonstrated
that with very low iron doses, the H 2 O 2 is used more efficiently.
Table 4.1 Designs of experiments performed at the PSA
Exp.
[4-CP] 0
ppm
[Fe 2+] 0
ppm
[H 2 O 2 ] 0
ppm
coded
Fe 2+ H 2 O 2
Temperature
ºC
initial
pH
1 200 10 500 0 + 27 2.8
2 200 10 400 0 0 27 2.8
3 200 10 300 0 - 27 2.8
4 200 2 300 - - 27 2.8
5 200 20 300 + - 27 2.8
6 200 20 500 + + 27 2.8
7 200 2 500 - + 27 2.8
84