Pilot plan protocol for optimization of UV dose required to obtain an appropriate municipal wastewater disinfection

Dávila, Inmaculada Salcedo; Balao, J.A. Andrade; Alonso, J. M. Quiroga; Nebot, Enrique

doi:10.2166/aqua.2008.072

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Application of UV radiation for the disinfection of wastewater is a scientific task which has recently been explored. The number of facilities using UV disinfection has augmented in the last years and it is expected to keep increasing in the next years [2,4,6]. Ozone, on the other hand, has been described as an efficient disinfection agent, able not only to control bacteria, but also to oxidize organic matter in municipal effluents [7].…”

Section: Introductionmentioning

confidence: 99%

Disinfection of Primary Municipal Wastewater Effluents Using Continuous UV and Ozone Treatment

Bustos¹,

Vaca²,

López³

et al. 2014

JWARP

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UV radiation and ozonation were investigated as disinfection alternatives for the wastewater treatment plant. The inactivation of total and fecal coliforms using ozone and ultraviolet radiation as separate treatments was evaluated. Different ozone concentrations (3 to 40 mg O 3 /L) were applied and UV fluencies ranging from 8.5 to 12 mJ/cm 2 at different pH values (from 5 to 9) were tested. Best results were obtained for ozone doses near 20 mg/min with removals of 72% and 78% of fecal and total coliforms, respectively. The ozone also was capable of oxidizing organic matter in the effluent measured as COD (the highest removal obtained was 36% for 20 mg O 3 /min). Maximum bacterial resistance was observed at pH 7 in both cases. The UV light offered a high bacterial inactivation (over 80%) and the lowest bacterial inactivation was observed at pH 7. Finally, we obtained the electric energy per order (E EO , kWh/m 3 /order), defined as the electric energy (kW-h) required to degrade a contaminant by one order of magnitude in a unit volume of contaminated water, being noteworthy that E EO values for the UV process resulted were lower than those determined for the process with ozone in all the water flow tested.

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Section: Introductionmentioning

confidence: 99%

Disinfection of Primary Municipal Wastewater Effluents Using Continuous UV and Ozone Treatment

Bustos¹,

Vaca²,

López³

et al. 2014

JWARP

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“…Dose dependence has been observed with the inactivation of Escherichia coli O157:H7, with a high dose of 913 mJ/cm 2 of UV irradiation causing damage to the cell membrane, while the membrane remained intact with a relatively low dose of 0-203 mJ/cm 2 [35]. Meanwhile, Salcedo Dávila et al [36] found with a pilot plant that a mean UV dose of 50 mWs/cm 2 was sufficient to meet required microbiological quality standards. Nguyen et al [5] observed that inactivation varied with the UV dose applied, finding that with 47.8 ± 1.6 mJ/cm 2 the coliphage MS2 reduction was 2.6 ± 0.1 uLog, while with a dose of 69.4 ± 3.8 mJ/cm 2 the reduction increased to 3.7 ± 0.2 uLog.…”

Section: Uv Dosementioning

confidence: 99%

UV Disinfection Systems for Wastewater Treatment: Emphasis on Reactivation of Microorganisms

et al. 2023

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UV disinfection is cost-effective and easy to maintain for decentralized areas. However, to ensure its effectiveness, some parameters need to be considered. In this study, a general search of Web of Science articles was performed to determine the possible influence of these parameters on the reactivation of microorganisms in UV systems; in addition, different search strings were used focusing exclusively on wastewater treatment, UV systems and Advanced Oxidation Processes (AOPs). It was found that in order to maintain low transmittance, it is essential to remove suspended solids and reduce water hardness. It is recommended to control the zeta potential in the range of 0–5 mV to avoid the aggregation of particles and bacteria. Determining the appropriate UV dose is essential to mitigate the reactivation of microorganisms. A minimum dose of 40 mJ/cm2 can contribute to effective disinfection and reduce the likelihood of reactivation. In addition, maintaining a residual chlorine level of at least 0.5 mg/L provides an additional barrier to reactivation. It is also important to optimize the design flow rate of the UV system as recommended for each individual unit. These measures, together with the combination of UV disinfection and chemical or AOPS, can effectively reduce the reactivation.

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Degradation of organic matter from wastewater using advanced primary treatment by O3 and O3/UV in a pilot plant

Bustos-Terrones

Rangel‐Peraza

Sanhouse

et al. 2016

Physics and Chemistry of the Earth, Parts A/B/C

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Pilot plan protocol for optimization of UV dose required to obtain an appropriate municipal wastewater disinfection

Cited by 4 publications

References 8 publications

Disinfection of Primary Municipal Wastewater Effluents Using Continuous UV and Ozone Treatment

Disinfection of Primary Municipal Wastewater Effluents Using Continuous UV and Ozone Treatment

UV Disinfection Systems for Wastewater Treatment: Emphasis on Reactivation of Microorganisms

Degradation of organic matter from wastewater using advanced primary treatment by O3 and O3/UV in a pilot plant

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