Particle Effects on Ultraviolet Disinfection of Coliform Bacteria in Recycled Water

Jolis, Domènec; Lam, Curtis H.; Pitt, Paul

doi:10.2175/106143001x139218

Cited by 62 publications

(55 citation statements)

References 4 publications

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“…Particles larger than approximately 7-10 µm are able to enmesh and protect coliform bacteria from UV light (Qualls et al, 1983;Emerick et al, 2000;Jolis et al, 2001;Wright et al, 2002). Emerick et al (2000) derived an equation for describing the inactivation of particle-associated coliform bacteria in wastewater secondary effluent exposed to UV disinfection, shown below:…”

Section: Cases Studies Of the Inactivation Of Particle-associated mentioning

confidence: 99%

Particle-Associated Viruses in Water: Impacts on Disinfection Processes

Templeton

Andrews

Hofmann

2008

Critical Reviews in Environmental Science and Technology

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Studies have shown that viruses are frequently attached onto or enmeshed within suspended particles in natural water and wastewater and that this viral particle-association can impede disinfection processes in some circumstances. This article summarizes the current state of knowledge of the occurrence of particle-associated viruses in the aquatic environment and the reported subsequent impacts on disinfection processes. The intention is that this article will help guide future research and aid regulators attempting to address the disinfection of particle-laden waters.

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Section: Cases Studies Of the Inactivation Of Particle-associated mentioning

confidence: 99%

Particle-Associated Viruses in Water: Impacts on Disinfection Processes

Templeton

Andrews

Hofmann

2008

Critical Reviews in Environmental Science and Technology

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“…It is seen that the UV irradiation is unlikely to be economically feasible due to its high energy consumption. The commonly applied UV dose for disinfecting wastewater is generally less than 100 mJ/cm 2 (Bourrouet et al, 2001;Jolis et al, 2001). Occasionally, a UV dose of 170-300 mJ/cm 2 has been applied to achieve a higher efficiency of bacteria inactivation (Thompson et al, 2003;Lazarova and Savoys, 2004).…”

Section: Disinfection With Uv Lightmentioning

confidence: 99%

Disinfection of swine wastewater using chlorine, ultraviolet light and ozone

et al. 2006

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Swine wastewater Chlorine Ultraviolet light Ozone A B S T R A C TVeterinary antibiotics are widely used at concentrated animal feeding operations (CAFOs) to prevent disease and promote growth of livestock. However, the majority of antibiotics are excreted from animals in urine, feces, and manure. Consequently, the lagoons used to store these wastes can act as reservoirs of antibiotics and antibiotic-resistant bacteria.There is currently no regulation or control of these systems to prevent the spread of these bacteria and their genes for antibiotic resistance into other environments. This study was conducted to determine the disinfection potential of chlorine, ultraviolet light and ozone against swine lagoon bacteria. Results indicate that a chlorine dose of 30 mg/L could achieve a 2.2-3.4 log bacteria reduction in lagoon samples. However, increasing the dose of chlorine did not significantly enhance the disinfection activity due to the presence of chlorine-resistant bacteria. The chlorine resistant bacteria were identified to be closely related to Bacillus subtilis and Bacillus licheniformis. A significant percentage of lagoon bacteria were not susceptible to the four selected antibiotics: chlortetracycline, lincomycin, sulfamethazine and tetracycline (TET). However, the presence of both chlorine and TET could inactivate all bacteria in one lagoon sample. The disinfection potential of UV irradiation and ozone was also examined. Ultraviolet light was an effective bacterial disinfectant, but was unlikely to be economically viable due to its high energy requirements. At an ozone dose of 100 mg/L, the bacteria inactivation efficiency could reach 3.3À3.9 log.

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“…To reduce the pathogenetic risk, disinfection using chlorine is generally performed. However, the adverse effects of chlorination have caused concerns over the formation of hazardous disinfection byproducts (DBPs), and ultraviolet (UV) irradiation has been focused as a substitute for chlorination disinfection (Jolis et al, 2001). With the rapid development of membrane technologies, reclamation of municipal wastewater using ultrafiltation (UF)and reverse osmosis (RO) have become increasingly attractive (Bourgeous et al, 2001;Qin et al, 2005).…”

Section: Introductionmentioning

confidence: 99%