TY - JOUR
T1 - Solar heterogeneous and homogeneous photocatalysis as a pre-treatment option for biotreatment
AU - Oller, Isabel
AU - Fernández-Ibáñez, Pilar
AU - Maldonado, Manuel I.
AU - Pérez-Estrada, Leonidas
AU - Gernjak, Wolfgang
AU - Pulgarín, César
AU - Passarinho, Paula C.
AU - Malato, Sixto
PY - 2007/1/1
Y1 - 2007/1/1
N2 - In this paper, we present pilot-scale solar Photo-Fenton and TiO 2 treatment of a model compound (α-methylphenylglycine) dissolved in 500 mg/1 concentration in water. Not only contaminant disappearance and mineralisation were evaluated, but also enhancement of biodegradability. The solar photoreactors, composed of 4.16 m2: of compound parabolic collectors, had a total volume of 82 1 (44.61 illuminated). Treatment was successful with both Advanced Oxidation Processes (AOPs) tested, but photo-Fenton was shown to be by far more efficient from the kinetic and practical point of view. To find out the conditions for biocompatibility using the AOPs as a pre-treatment, waste water after certain degradation time, unacclimated municipal sludge and mineral nutrients were placed together and evaluated by the Zahn-Wellens (Z-W) test. Biodegradability was enhanced (70% biodegradable) by both AOPs, but photo-Fenton was demonstrated to be more efficient, requiring a treatment time one order of magnitude shorter than TiO2. Hydrogen peroxide management for reduced consumption and elimination prior to discharging water to the biotreatment step is also discussed in detail.
AB - In this paper, we present pilot-scale solar Photo-Fenton and TiO 2 treatment of a model compound (α-methylphenylglycine) dissolved in 500 mg/1 concentration in water. Not only contaminant disappearance and mineralisation were evaluated, but also enhancement of biodegradability. The solar photoreactors, composed of 4.16 m2: of compound parabolic collectors, had a total volume of 82 1 (44.61 illuminated). Treatment was successful with both Advanced Oxidation Processes (AOPs) tested, but photo-Fenton was shown to be by far more efficient from the kinetic and practical point of view. To find out the conditions for biocompatibility using the AOPs as a pre-treatment, waste water after certain degradation time, unacclimated municipal sludge and mineral nutrients were placed together and evaluated by the Zahn-Wellens (Z-W) test. Biodegradability was enhanced (70% biodegradable) by both AOPs, but photo-Fenton was demonstrated to be more efficient, requiring a treatment time one order of magnitude shorter than TiO2. Hydrogen peroxide management for reduced consumption and elimination prior to discharging water to the biotreatment step is also discussed in detail.
KW - Biodegradability
KW - Photo-Fenton
KW - Photocatalysis
KW - Solar photoreactors
KW - Solar treatment
KW - Titanium dioxide
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=33846519368&partnerID=8YFLogxK
U2 - 10.1163/156856707779238586
DO - 10.1163/156856707779238586
M3 - Article
AN - SCOPUS:33846519368
SN - 0922-6168
VL - 33
SP - 407
EP - 420
JO - Research on Chemical Intermediates
JF - Research on Chemical Intermediates
IS - 3-5
ER -
