Avaliação do emprego da radiação ultravioleta na desinfecção de esgoto sanitário

Souza, Jeanette Beber de; Vidal, Carlos Magno de Sousa; Cavallini, Grasiele Soares; Quartaroli, Larissa; Marcon, Lucas Ricardo C

doi:10.5433/1679-0375.2012v33n2p117

Cited by 8 publications

(12 citation statements)

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“…On the other hand, in the same test, UV radiation was not very efficient to remove total coliforms (maximum inactivation log 1,76). The biggest difficulty to the inactivation of total coliforms is also observed in several other studies in the area specific literature, including Souza et al [15].…”

Section: Tests Of Wastewater Disinfectionsupporting

confidence: 55%

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Water and Wastewater Disinfection with Peracetic Acid and UV Radiation and Using Advanced Oxidative Process PAA/UV

Souza

Valdez²,

Jeranoski

et al. 2015

International Journal of Photoenergy

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The individual methods of disinfection peracetic acid (PAA) and UV radiation and combined process PAA/UV in water (synthetic) and sanitary wastewater were employed to verify the individual and combined action of these advanced oxidative processes on the effectiveness of inactivation of microorganisms indicators of fecal contaminationE. coli, total coliforms (in the case of sanitary wastewater), and coliphages (such as virus indicators). Under the experimental conditions investigated, doses of 2, 3, and 4 mg/L of PAA and contact time of 10 minutes and 60 and 90 s exposure to UV radiation, the results indicated that the combined method PAA/UV provided superior efficacy when compared to individual methods of disinfection.

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Section: Tests Of Wastewater Disinfectionsupporting

confidence: 55%

“…Radiation intensity measurements were carried out with a radiometer (Vilber Lourmat) with UV radiation detector sensor at the 254 nm wavelength. To determine the UV radiation dose, the route described by Daniel [14], as well as the study carried out by Souza et al [15], was followed.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Water and Wastewater Disinfection with Peracetic Acid and UV Radiation and Using Advanced Oxidative Process PAA/UV

Souza

Valdez²,

Jeranoski

et al. 2015

International Journal of Photoenergy

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“…Bilotta and Daniel (2012) tested the effect of effective UV doses (123.0 and 247.0 mWscm -2 ) on effluent from secondary treatment with exposure times of 60/120 seconds and noted the inactivation of 1.6 to 5.2 log-cycles of E. coli. Souza et al (2012) in one of their UV assays observed that 317.1 mWscm -2 were required to inactivate 3.7 and 2.0 log-cycles of E. coli and CT, respectively. However, a dose of 42.28 mWscm -2 was able to disinfect approximately 5 log of the same microorganisms.…”

Section: Resultsmentioning

confidence: 99%

Adaptation of domestic effluent for agricultural reuse by biological, physical treatment and disinfection by ultraviolet radiation

2019

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Domestic effluent reuse is an alternative for irrigated agriculture in situations of reduced water availability. However, as there is the presence of pathogens in wastewater, the disinfection process is necessary before use. This research evaluated the sanitary and agricultural viability of treated wastewater at a pilot-scale station composed of a septic tank, Wetlands and an ultraviolet radiation (UV) disinfection system. The Sewage Treatment Station (STS) is installed in the Agricultural Sciences Center, UFSCar, in Araras city, SP, and receives 2000 L of sewage daily, which was monitored in terms of pH, turbidity, electrical conductivity (EC), dissolved oxygen (DO), sodium (Na), potassium (K), calcium (Ca), total nitrogen (TN), total phosphorus (TP), magnesium (Mg), total organic carbon (TOC), total coliforms (TC), Escherichia coli (E. coli) and Sodium Adsorption Ratio (SAR).The removal efficiency of the parameters was calculated based on the input and output means of each treatment unit. Results indicated removal efficiency for K (68.2%), TN (54.1%) and TP (36.1%). The levels of Na (26.7%) and Ca (22.9%) demonstrated the contribution of these salts to the wastewater; however, SAR did not present any risks for soil sodification. Microbiologically, the STS presented removal efficiency of 4 and 5 log-cycles for TC and E. coli, respectively. Therefore, results of monitoring indicate that the treated wastewater presents sanitary and agricultural viability, and conforms with the current legislation.

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“…As doses de radiação foram calculadas pelo produto da intensidade de radiação pelo tempo de exposição, de acordo com Souza et al (2012).…”

Section: Figura 1 -Fluxograma Dos Experimentos Realizadosunclassified

Tratamento Avançado de Efluente de Reator UASB por Membrana de Microfiltração Associado à Desinfecção por Radiação Ultravioleta

et al. 2016

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ResumoA baixa eficiência dos reatores UASB, no que se refere às remoções de nutrientes, patogênicos e matéria orgânica, faz com que seja necessário o pós-tratamento, a fim de melhorar a qualidade do efluente gerado. Assim sendo, investigou-se nesse estudo a utilização da microfiltração associada à desinfecção por radiação ultravioleta como alternativa ao tratamento avançado de esgotos. Para isso, foram coletadas amostras de efluente de reator UASB a fim de realizar ensaios em sistema piloto de microfiltração, utilizando-se em uma das amostras a pré-coagulação com tanino vegetal. Keywords: Membrane Filtration, Post-sewage Treatment, UV Radiation.The low efficiency of UASB bioreactors, regarding the removal of nutrient, organic matter and pathogens, makes it necessary to carry out a post treatment, in order to improve the quality of the effluent. Accordingly, this research has examined the use of microfiltration associated to the disinfection by the ultraviolet radiation, as an option to this post treatment. For so, were collected samples of UASB reactors' effluent, in order to carry out some tests on a pilot microfiltration system, using in one of the samples pre-coagulation with vegetable tannin. After, all the microfiltrated samples were inserted in a UV reactor, applying different radiation doses, ranging from 43.8 to 194.9 mWs.cm -2, to simulate the disinfection. The system used showed good results in terms of turbidity removal, apparent color, true color, phosphorus, nitrogen, total solids, total suspended solids and COD, reaching in the best operating condition, the following values: 1.90 uT, 15 uC, 10 uC, 0.94 mg/L, 17.64 mg/L, 123 mg/L, 0 mg/L and 10 mg/L, respectively, which represent the following removal percentages: 91.3%, 93.6%, 82.0%, 55.1%, 26.3%, 35% and 86.1%. The inactivation obtained for E. coli, total coliforms, colifagos and Clostridium perfrigens was satisfactory, achieving a higher inactivation than the detection limit of the method used, when submitted to the highests tested radiation doses. The average permeate flux ranged from 55.2 to 133.6 L.m

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Avaliação do emprego da radiação ultravioleta na desinfecção de esgoto sanitário

Cited by 8 publications

References 0 publications

Water and Wastewater Disinfection with Peracetic Acid and UV Radiation and Using Advanced Oxidative Process PAA/UV

Water and Wastewater Disinfection with Peracetic Acid and UV Radiation and Using Advanced Oxidative Process PAA/UV

Adaptation of domestic effluent for agricultural reuse by biological, physical treatment and disinfection by ultraviolet radiation

Tratamento Avançado de Efluente de Reator UASB por Membrana de Microfiltração Associado à Desinfecção por Radiação Ultravioleta

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