UV disinfection of treated wastewater in a large-scale pilot plant and inactivation of selected bacteria in a laboratory UV device

Hassen, Abdennaceur; Mahrouk, Meryem; Ouzari, Hadda; Chérif, Mohamed; Boudabous, Abdellatif; Damelincourt, J. J.

doi:10.1016/s0960-8524(99)00179-0

Cited by 142 publications

(86 citation statements)

References 19 publications

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“…The laboratory UV device used in this study was previously described by Hassen et al (2000). A collection of 22 strains of Pseudomonas aeruginosa was used in this work.…”

Section: Uv Processingmentioning

confidence: 99%

“…In general, variation in the bacterial photoreactivation is seriously discussed in the literature; and it seems that certain micro-organisms are able to repair some of the damage caused by UV light when exposed to light in the near-UV or violet-blue spectral range (Hassen et al, 2000). Different mechanisms are proposed to explain the process of photoreactivation.…”

Section: Impact Of Temperature On the Photoreactivation Repairmentioning

confidence: 99%

“…The second mechanism is the substitution of damaged nucleotides. The best known example is cutting-repairing: a sequence of low adjacent bases is excised from DNA submitted to the UV radiance, and then it is resynthesized correctly (Hassen et al, 2000;Kashimada et al, 2006). Nevertheless, the process of photoreactivation is not general in all bacteria.…”

Section: Impact Of Temperature On the Photoreactivation Repairmentioning

confidence: 99%

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Modeling of ultraviolet (UV) radiation under a large pilot-scale designed for wastewater disinfection and inactivation of selected bacteria of Pseudomonas aeruginosa in a laboratory UV device

Mounaouer¹,

Hassen²

2014

Afr. J. Microbiol. Res.

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The aim of this paper was to propose a modeling system of water ultraviolet (UV) disinfection. Results reveal that application of the model of Chick-Watson in its original form or modified are not representative of the kinetics of disinfection. For this reason, the application of a new kinetic model of Collins-Selleck in UV inactivation of Pseudomonas aeruginosa in secondary wastewater appeared to be the best applied model. The modeling of the reactivation process at range of 7.5-50°C temperature was shown. First-order saturation does not fit the obtained data in photoreactivation; a modification of the model is proposed coinciding with the classical logistic equation. To better explain the process of inactivation, we have assumed that the action of disinfectant on the survival of lonely microorganisms is faster than its action on suspended solids protected or agglomerated to each other. For this reason, the application of a new kinetic model by introducing a third factor reflecting the influence of suspended solids in water on disinfection kinetics appeared to be determinant for modeling UV inactivation of P. aeruginosa in secondary treated wastewater.

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“…The laboratory UV device used in this study was previously described by Hassen et al (2000). A collection of 22 strains of Pseudomonas aeruginosa was used in this work.…”

Section: Uv Processingmentioning

confidence: 99%

Section: Impact Of Temperature On the Photoreactivation Repairmentioning

confidence: 99%

Section: Impact Of Temperature On the Photoreactivation Repairmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of ultraviolet (UV) radiation under a large pilot-scale designed for wastewater disinfection and inactivation of selected bacteria of Pseudomonas aeruginosa in a laboratory UV device

Mounaouer¹,

Hassen²

2014

Afr. J. Microbiol. Res.

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“…Selon HaSSEn et al (2000), plus la valeur du coefficient de létalité k est grande, plus la souche bactérienne est vulnérable à l'action des UV-C et plus la valeur du coefficient k est petite, plus le microorganisme est tolérant à l'action de ces rayonnements germicides. En se basant sur cet argument, nous pouvons déduire l'efficacité de la lampe UV à basse pression alimentée à haute fréquence (E2).…”

Section: éTude De La Cinétique D'inactivation Bactérienne Irradiée Parunclassified

Impact du mode d'alimentation électronique d'une lampe UV-C sur le processus de désinfection des eaux

Said

Mustapha²,

Trabelsi

et al. 2011

rseau

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En vue d’améliorer le processus de désinfection des eaux (usées et potables) par irradiation UV-C, une lampe UV-C à vapeur de mercure à basse pression est mise en fonctionnement en utilisant deux types d’alimentation électronique : une alimentation électronique traditionnelle de 50 Hz, et une alimentation électronique modifiée à haute fréquence de 64 KHz. L’exploitation des résultats de la cinétique d’inactivation bactérienne par un modèle de simulation mathématique, le modèle de « Series-Events », a permis de mettre en relief l’amélioration du processus de traitement par irradiation UV, en utilisant une lampe UV à basse pression, alimentée à haute fréquence. Cette amélioration est traduite par l’augmentation de l’abattement bactérien avec une réduction notable du temps d’exposition UV par rapport à celui déterminé après une irradiation par une lampe UV-C classique. En plus, la détermination du coefficient de réactivation bactérienne (Cr), après la mise en repos des bactéries postirradiées en présence et ou en absence de la lumière visible, montre une inactivation irréversible des bactéries testées par les mécanismes de réactivation photodépendants et photoindépendants, dans le cas d’irradiation par une lampe UV-C alimentée à haute fréquence. L’augmentation de l’abattement irréversible des bactéries testées à un temps d’exposition réduit est en rapport direct avec l’augmentation du flux spectral UV monochromatique de la raie 253,7 nm fourni par la lampe UV à basse pression, alimentée à haute fréquence (64 KHz). Cette augmentation de flux UV de germicide permet de surmonter les inconvénients liés à l’utilisation d’une lampe UV conventionnelle, à savoir la détermination de la dose létale et le problème de réactivation bactérienne après traitement par la lumière ultraviolette.

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“…Several works report the efficiency of UV light into the inactivation of different microorganisms by using either bench top collimated beam apparatus or continuous flow reactors (Sommer, 1998;Lage, 2003), what lead to the approval since November 29 UV disinfection is mainly used in air and water purification, and sewage treatment of food and beverages (Blume and Neis, 2004;Chmiel et al, 2002;Green et al, 1995;Hassen et al, 2000), processing of drinking water (Peldszus et al, 2003;Lehtola et al, 2004), and it is potentially useful for milk and fruit juice production (Koutchma, 2004;Matak, 2005). Chmiel et al (2002) determined the reduction of highly contaminated spent process water of food and beverage industries using the combination of a membrane bioreactor, UV pre-disinfector and UV disinfection apparatus.…”

Section: Uv Microbial Inactivationmentioning

confidence: 99%

Study of short-wave ultraviolet treatments (UV-C) as a non-thermal preservation process for liquid egg products

Souza¹

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UV disinfection of treated wastewater in a large-scale pilot plant and inactivation of selected bacteria in a laboratory UV device

Cited by 142 publications

References 19 publications

Modeling of ultraviolet (UV) radiation under a large pilot-scale designed for wastewater disinfection and inactivation of selected bacteria of Pseudomonas aeruginosa in a laboratory UV device

Modeling of ultraviolet (UV) radiation under a large pilot-scale designed for wastewater disinfection and inactivation of selected bacteria of Pseudomonas aeruginosa in a laboratory UV device

Impact du mode d'alimentation électronique d'une lampe UV-C sur le processus de désinfection des eaux

Study of short-wave ultraviolet treatments (UV-C) as a non-thermal preservation process for liquid egg products

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