Water disinfection by solar photocatalysis using compound parabolic collectors

Fernández, P.; Blanco, J.; Sichel, C.; Malato, Sixto

doi:10.1016/j.cattod.2005.03.062

Cited by 160 publications

(84 citation statements)

References 21 publications

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“…Dos tipos de catalizadores fueron colocados axialmente y en serie dentro del reactor: el catalizador Ahlstrom (dos tubos) y un complejo de rutenio (dos tubos). El catalizador Ahlstrom está compuesto por un entramado de celulosa sobre la cual se han soportado nanopartículas de TiO 2 [9][10][11] y absorbe energías mayores a 3.2 eV. El catalizador basado en un complejo de rutenio, soportado sobre silicona porosa tiene una alta absorción en el rango visible [12] y genera oxígeno "singulete" de gran poder oxidante.…”

Section: Metodologia De Experimentalunclassified

Tecnología solar aplicada a la purificación de agua

Rodríguez

Jorge

Zúñiga

et al. 2010

TEC

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Section: Metodologia De Experimentalunclassified

Tecnología solar aplicada a la purificación de agua

Rodríguez

Jorge

Zúñiga

et al. 2010

TEC

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“…In order to increase the amount of water treated by solarassisted methods, compound parabolic collector reactors have been used [17,18,23] and [26], and solar photo-Fenton even was a subject under question, because of the intermittent action of the light [27]. There is a technical issue to be addressed in the intermittent nature of this treatment method, and the existence of ''dead'' time among the experiment.…”

Section: Introductionmentioning

confidence: 99%

“…The recirculating flow of these reactors creates a gap in the illumination for as long as water is present in the (dark) storage tank, allowing bacterial defense mechanisms to deploy [28]. Literature indicates a variety of light-to-dark distributions (Table 1), which materialize this difference [17,18,23,26,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Ultrasound enhancement of near-neutral photo-Fenton for effective E. coli inactivation in wastewater

Giannakis

Papoutsakis

Darakas

et al. 2015

Ultrasonics Sonochemistry

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a b s t r a c tIn this study, we attempt for the first time to couple sonication and photo-Fenton for bacterial inactivation of secondary treated effluent. Synthetic wastewater was subjected to sequential high-frequency/low power sonication, followed by mild photo-Fenton treatment, under a solar simulator. It was followed by the assessment of the contribution of each component of the process (Fenton, US, hv) towards the removal rate and the long-term survival; sunlight greatly improved the treatment efficiency, with the coupled process being the only one to yield total inactivation within the 4-h period of treatment. The short-term beneficial disinfecting action of US and its detrimental effect on bacterial survival in long term, as well as the impact of light addition were also revealed. Finally, an investigation on the operational parameters of the process was performed, to investigate possible improvement and/or limitations of the coupled treatment; 3 levels of each parameter involved (hydraulic, environmental, US and Fenton) were tested. Only H 2 O 2 increased improved the process significantly, but the action mode of the joint process indicated potential cost-effective solutions towards the implementation of this method.

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“…In this respect, ozonation and UV-C irradiation have traditionally been tested and, to a certain extent, employed as disinfection methods due to the simplicity of operation and the relatively affordable operating and maintenance costs (Rice et al, 1981;Symons et al, 1989;Lin et al, 1999;Bonacquisti, 2006;Wait et al, 2007). In recent years research on disinfection has been directed to the use of (i) TiO 2 heterogeneous photocatalysis driven by artificial (UV or visible) or natural sunlight irradiation (Fernández et al, 2005;Belgiorno et al, 2007), and (ii) ultrasound (US) which represents a relatively innovative technique to conventional treatment technologies (Mason and Tiehm, 2001;Khan et al, 2006;Naddeo et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Water and wastewater disinfection by ultrasound irradiation - a critical review

Naddeo¹,

Cesaro²,

Mantzavinos³

et al. 2014

Global NEST Journal

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It is well known that chlorine and its compounds, traditionally utilized for water and wastewater disinfection, react with some organic matter to form undesirable by-products, hazardous to human health, known as Disinfection By-Products (DBPs). In many countries very stringent limits for chlorination by-products such as trihalomethanes were set for wastewater reuse. Accordingly, the use of different oxidation/disinfection systems should be evaluated as possible alternative to chlorine. Ultrasound (US) was recently found to be effective for this purpose.Aim of this work is to review main US disinfection studies, pointing out ultrasound mechanisms as well as its effects in terms of different bacteria inactivation (Total coliform, Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Saccharomyces cerevisiae, Klebsiella pneumonia) at both laboratory scale and pilot-scale. To this end, several experimental results were discussed and both focal interest points and encountered problems were summarized.Moreover the intensification of cavitation phenomena by combined oxidation processes was overviewed and main advantages and disadvantages were pointed out, in order to address future research and promote efficient large scale operations.

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Water disinfection by solar photocatalysis using compound parabolic collectors

Cited by 160 publications

References 21 publications

Tecnología solar aplicada a la purificación de agua

Tecnología solar aplicada a la purificación de agua

Ultrasound enhancement of near-neutral photo-Fenton for effective E. coli inactivation in wastewater

Water and wastewater disinfection by ultrasound irradiation - a critical review

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