Our main purpose was to study the disinfection of a secondary wastewater anaerobic effluent by a combined photolytic-photocatalytic continuous reactor using solar irradiation. This reactor had a rectangular section and included back-and-forth-flow internal channels. It comprised two compartments: the first one corresponded to photolytic disinfection with a residence time and the second one corresponded to photocatalytic disinfection with a residence time. The photocatalyst used was Degussa P-25 fixed on an ordinary tile. By use of this reactor between and with a water flow rate of , the total coliform concentration diminished by four orders of magnitude, reaching values lower than (most probable number)/, which are below the regulation. Even if photolysis was important, this single process did not permit one to obtain an outlet coliform concentration below ; however, it helped to improve the photocatalytic performance. A decrease in chemical oxygen demand (COD) was also observed in the photocatalytic compartment, illustrating an oxidation of organic pollutants. In parallel, batch experiments were carried out to get information about the residence times, the photocatalytic performance of fixed on an ordinary tile, and the photolytic effect. The results suggest that this low cost and easy to operate treatment system could be a promising alternative to usual systems for the decrease in COD and the disinfection of domestic wastewaters.
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e-mail: enriquez@angel.umar.mx
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November 2008
Research Papers
Preliminary Study of the Disinfection of Secondary Wastewater Using a Solar Photolytic-Photocatalytic Reactor
Héctor Hernández-García,
Héctor Hernández-García
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
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Héctor López-Arjona,
Héctor López-Arjona
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
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Juan Francisco Rodríguez,
Juan Francisco Rodríguez
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
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Rosario Enríquez
Rosario Enríquez
Laboratorios de Ingeniería Ambiental,
e-mail: enriquez@angel.umar.mx
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
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Héctor Hernández-García
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
Héctor López-Arjona
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
Juan Francisco Rodríguez
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, México
Rosario Enríquez
Laboratorios de Ingeniería Ambiental,
Universidad del Mar
, Puerto Ángel, C.P. 70902 Oaxaca, Méxicoe-mail: enriquez@angel.umar.mx
J. Sol. Energy Eng. Nov 2008, 130(4): 041004 (5 pages)
Published Online: September 4, 2008
Article history
Received:
November 13, 2007
Revised:
November 26, 2007
Published:
September 4, 2008
Citation
Hernández-García, H., López-Arjona, H., Rodríguez, J. F., and Enríquez, R. (September 4, 2008). "Preliminary Study of the Disinfection of Secondary Wastewater Using a Solar Photolytic-Photocatalytic Reactor." ASME. J. Sol. Energy Eng. November 2008; 130(4): 041004. https://doi.org/10.1115/1.2969801
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