Removal of viruses, parasitic protozoa and microbial indicators in conventional and membrane processes in a wastewater pilot plant

Ottoson, Jakob; Hansen, Aviaja Anna; Björlenius, Berndt; Nordér, Helené; Stenström, Thor Axel

doi:10.1016/j.watres.2006.01.039

Cited by 221 publications

(141 citation statements)

References 26 publications

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“…in an MBR pilot plant with a nominal pore size of 0.4 µm. These relatively high removal rates for bacteria and protozoa have also been observed in a number of other studies (Ottoson et al, 2006;Zhang and Farahbakhsh, 2007;Zanetti et al, 2010).…”

Section: Introductionsupporting

confidence: 77%

“…Ottoson et al (2006) demonstrated that human virus genomes were not removed as effectively as phages, with 1.8 and 1.1 log removals for enteroviruses and noroviruses, respectively, but the authors concluded that the differences were probably related to the use of different detection methods. For example, phages are normally cultured, whilst human viruses are typically detected using culture-independent molecular approaches (e.g., PCR), which are based on the detection of nucleic acids, rather than a complete, infectious particle (virion).…”

Section: Introductionmentioning

confidence: 99%

“…A range of studies, performed at both pilot-scale and within full-scale municipal wastewater plants, have demonstrated that microbial removal in MBR systems is more effective than in conventional activated sludge treatment systems (Arraj et al, 2005;Ottoson et al, 2006;Francy et al, 2012;Marti et al, 2011). Further, MBR systems have been shown to remove microorganisms that are greater in size than the membrane filter pores.…”

Section: Introductionmentioning

confidence: 99%

“…Removal of enteric viruses by MBR treatment has also been investigated (Ottoson et al, 2006;Francy et al, 2012) and results from comparative studies suggest that MBR treatment removes enteric viruses more effectively than conventional secondary treatment (Oota et al, 2005;Zhang and Farahbakhsh, 2007). Ottoson et al (2006) demonstrated that human virus genomes were not removed as effectively as phages, with 1.8 and 1.1 log removals for enteroviruses and noroviruses, respectively, but the authors concluded that the differences were probably related to the use of different detection methods.…”

Section: Introductionmentioning

confidence: 99%

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Bacteriophage removal in a full-scale membrane bioreactor (MBR) – Implications for wastewater reuse

et al. 2015

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The aim of this study was to assess the potential removal efficacy of enteric viruses in a fullscale membrane bioreactor (MBR) wastewater reuse system, using a range of indigenous and 'spiked' bacteriophages (phages) of known size and morphology. Samples were taken each week for three months from nine locations at each treatment stage of the water recycling plant (WRP) and tested for a range of microbiological parameters (n=135). Mean levels of faecal coliforms were reduced to 0.3 CFU/ 100ml in the MBR product and were undetected in samples taken after the chlorination stage. A relatively large reduction (5.3 log) in somatic coliphages was also observed following MBR treatment. However, F-RNA and humanspecific (GB124) phages were less abundant at all stages, and demonstrated log reductions post-MBR of 3.5 and 3.8, respectively. In 'spiking' experiments, free-swimming 'spiked' phages (MS2 and B14) displayed post-MBR log reductions of 2.25 and 2.30, respectively.The removal of these 'free-swimming' phages, which are smaller than the membrane pore size (0.04 µm), also highlights the possible role of the membrane biofilm as an effective additional barrier to virus transmission. The findings from this study of a full-scale MBR

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bacteriophage removal in a full-scale membrane bioreactor (MBR) – Implications for wastewater reuse

et al. 2015

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“…With the passage through the membranes, there is almost complete remove of the bacteria, and partial viruses that however reach very high values in the case of ultrafiltration [85].…”

Section: Membrane Filtrationmentioning

confidence: 99%

Overview of the Main Disinfection Processes for Wastewater and Drinking Water Treatment Plants

et al. 2017

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Abstract:The use of water disinfection as a public health measure reduces the spread of diseases. Various disinfection technologies can be used to meet the pathogen inactivation demand in water. This work is an overview of the main disinfection technologies of wastewater and drinking water that reports for the conventional processes the action mechanism, the possible formation of by-products, the operative conditions, the advantages and disadvantages. For advanced and natural processes the action mechanisms are reported. Advanced technologies are interesting but are still in the research state, while conventional technologies are the most used. There is a tendency, especially in Italy, to use chlorine-based disinfectant, despite in some forms could lead to production of disinfection by-products.

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Wastewater Microbiology

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Removal of viruses, parasitic protozoa and microbial indicators in conventional and membrane processes in a wastewater pilot plant

Cited by 221 publications

References 26 publications

Bacteriophage removal in a full-scale membrane bioreactor (MBR) – Implications for wastewater reuse

Bacteriophage removal in a full-scale membrane bioreactor (MBR) – Implications for wastewater reuse

Overview of the Main Disinfection Processes for Wastewater and Drinking Water Treatment Plants

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