Mechanism of Cryptosporidium, Giardia, and MS2 virus removal by MF and UF

Jacangelo, Joseph G.; Adham, Samer; Laîné, J.M.

doi:10.1002/j.1551-8833.1995.tb06427.x

Cited by 200 publications

(113 citation statements)

References 8 publications

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“…The most effective PACl dosage from a previous study did not suitably remove the concentration of bacteriophage Qβ. These results relate to those of [22] who noticed that increasing the concentration of bacteriophage in the feed solution from 10 6 to 10 9 PFU/ml caused more than a 1 log drop in removal using ultrafiltration. Thus, the bacteriophage Qβ in the feed water can have an effect on the removal of bacteriophage Qβ of ceramic membrane microfiltration with in-line coagulation.…”

Section: Removal Of Bacteriophage Qβ With Different An Initial Concensupporting

confidence: 86%

Bacteriophage Removal Efficiency of In-line Coagulation with Ceramic Membrane Filtration

Wattanachira¹,

Rakruam²,

Yanthongyu³

et al. 2017

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Abstract. The main objectives of this study are to evaluate the removal efficiency of bacteriophage Qβ using in-line coagulation with ceramic membrane filtration at different coagulant dosages, ceramic membrane pore sizes and initial bacteriophage Qβ concentrations. Raw water was collected from the Ping River, Chiang Mai, Thailand, and spiked with bacteriophage Qβ to prepare an initial concentration of 8x10 6 PFU/ml. According to the resulted, it was found that the smaller pore sizes membrane yield higher bacteriophage Qβ log removal. However, the use of a ceramic membrane alone could not remove bacteriophage Qβ completely. In-line coagulation combined with ceramic membrane filtration was conducted. The optimal polyaluminum chloride (PACl) doses for the 1.0, 0.5 and 0.1 µm pore size membranes were 2.5, 2.0 and 1.5 mg-Al/L, respectively. Bacteriophage Qβ removal at the optimal PACl dose was more than 6.7 log in all cases. The results of effect of different initial bacteriophage Qβ concentration on the removal efficiency showed that in-line coagulation with ceramic membrane at all pore sizes can completely remove bacteriophage Qβ when the initial concentration was low (5x10 5 PFU/ml). However, the higher initial bacteriophage Qβ concentrations (4x10 6 and 8x10 7 PFU/ml) required a higher PACl dose to obtain effective bacteriophage Qβ removal.

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Section: Removal Of Bacteriophage Qβ With Different An Initial Concensupporting

confidence: 86%

Bacteriophage Removal Efficiency of In-line Coagulation with Ceramic Membrane Filtration

Wattanachira¹,

Rakruam²,

Yanthongyu³

et al. 2017

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“…Liu et al [108] reported a 0.5 log reduction in removal by a membrane immediately after backwash, which increased until the next backwash. Jacangelo et al [109] noted that the virus removal by MF/UF membranes was low at the beginning of filtration and increased with time with accumulation of foulants. However, in that study, the removal rate did not decrease after hydraulic backwash, indicating that the irreversible membrane fouling maintained the virus removal.…”

Section: Impact Of Membrane Cleaningmentioning

confidence: 99%

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

Hai

Riley

Shawkat

et al. 2014

Water

108

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Abstract:The continued depletion of fresh drinking water resources throughout the world has increased the need for a variety of water treatment and recycling strategies. Conventional wastewater treatment processes rely on extensive chemical post-disinfection to comply with the stringent microbiological safety for water reuse. When well designed and operated, membrane bioreactors (MBRs) can consistently achieve efficient removals of suspended solids, protozoa and coliform bacteria. Under optimal conditions, MBR systems can also significantly remove various viruses and phages. This paper provides an in-depth overview of the mechanisms and influencing factors of pathogen removal by MBR and highlights practical issues, such as reduced chemical disinfectant dosing requirements and associated economic and environmental benefits. Special attention has been paid to the aspects, such as membrane cleaning, membrane imperfections/breach and microbial regrowth, in the distribution system on the overall pathogen removal performance of MBR.

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“…However, more contradictory results were obtained when smaller pathogens like Cryptosporidium, Giardia and MS2 were considered [5,8,9].…”

Section: Introductionmentioning

confidence: 99%

Ultrafiltration (UF) Pilot Plant for Municipal Wastewater Reuse in Agriculture: Impact of the Operation Mode on Process Performance

Falsanisi

Liberti

Notarnicola

2010

Water

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Abstract:Following increasing interest in the use of UltraFiltration (UF) membrane processes as an alternative advanced disinfection technique, the performance of a UF pilot plant was investigated under two opposite operating conditions ("stressed operating condition" versus "conventional operating condition"). The results indicate that for both conditions, the reclaimed effluent complied with the Italian regulations for unrestricted wastewater reuse (i.e., Total Suspended Solids (TSS) < 10 mg/L; Chemical Oxygen Demand (COD) < 100 mg/L and Escherichia coli < 10 CFU/100 mL). On the other hand, when compared with the Title 22 of the California Wastewater Reclamation Criteria, only the effluent produced under the "conventional operating condition" met the stipulated water quality standards (i.e., TSS and turbidity undetectable and total coliforms < 2.2 CFU/100 mL). It should be noted that, in spite of the nominal cut-off size, total coliforms breakthrough was indeed occasionally observed. A localized membrane pore micro-enlargement mechanism was hypothesized to explain the total coliforms propagation in the ultrafiltered effluent, as monitoring of the membrane permeability and transmembrane pressure highlighted that gel/cake formation had only a minor contribution to the overall membrane fouling mechanism with respect to pore plugging and pore narrowing mechanisms. OPEN ACCESSWater 2009, 1 873

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Mechanism of Cryptosporidium, Giardia, and MS2 virus removal by MF and UF

Cited by 200 publications

References 8 publications

Bacteriophage Removal Efficiency of In-line Coagulation with Ceramic Membrane Filtration

Bacteriophage Removal Efficiency of In-line Coagulation with Ceramic Membrane Filtration

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

Ultrafiltration (UF) Pilot Plant for Municipal Wastewater Reuse in Agriculture: Impact of the Operation Mode on Process Performance

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