Virus Type-Specific Removal in a Full-Scale Membrane Bioreactor Treatment Process

Type Article
Date 2018-06
Language English
Author(s) Miura Takayuki1, 3, Schaeffer Julien1, Le Saux Jean-Claude1, Le Mehaute Philippe2, Le Guyader Soizick1
Affiliation(s) 1 : IFREMER, LSEM SG2 M, Lab Microbiol, Nantes, France.
2 : SAUR, Direct Gen Ouest, Vannes, France.
3 : Natl Inst Publ Hlth, Dept Environm Hlth, 2-3-6 Minami, Wako, Saitama 3510197, Japan.
Source Food And Environmental Virology (1867-0334) (Springer), 2018-06 , Vol. 10 , N. 2 , P. 176-186
DOI 10.1007/s12560-017-9330-4
WOS© Times Cited 34
Keyword(s) Norovirus, Sapovirus, Rotavirus, MBR, Mixed liquor suspended solids, Adsorption

We investigated removal of noroviruses, sapoviruses, and rotaviruses in a full-scale membrane bioreactor (MBR) plant by monitoring virus concentrations in wastewater samples during two gastroenteritis seasons and evaluating the adsorption of viruses to mixed liquor suspended solids (MLSS). Sapoviruses and rotaviruses were detected in 25% of MBR effluent samples with log reduction values of 3- and 2-logs in geometric mean concentrations, respectively, while noroviruses were detected in only 6% of the samples. We found that norovirus and sapovirus concentrations in the solid phase of mixed liquor samples were significantly higher than in the liquid phase (P < 0.01, t test), while the concentration of rotaviruses was similar in both phases. The efficiency of adsorption of the rotavirus G1P[8] strain to MLSS was significantly less than norovirus GI.1 and GII.4 and sapovirus GI.2 strains (P < 0.01, t test). Differences in the adsorption of viruses to MLSS may cause virus type-specific removal during the MBR treatment process as shown by this study.

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