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Description: 10-Year-Old Membranes Challenge the Tiered System with Protozoa, Virus and Surrogate...
10-Year-Old Membranes Challenge the Tiered System with Protozoa, Virus and Surrogate Removal
Abstract
In this work, pathogen LRVs were quantified from a unique, 10-year-old MBR installation, in line with recent guidance from the WRF project 4997. The Kubota membrane system studied should achieve LRVs of >3.0 for Cryptosporidium, 4.0 for Giardia and over 2.5 for enteroviruses over its lifetime. These results surpass benchmarks accounting for the impacts of ageing membranes. Pathogen LRVs were compared against suitable indicator organisms as well. To further understand the contributions of the bioreactor to pathogen removal in MBR, systematic pilot scale studies were also conducted. Excluding bioflim and membrane exclusion, the results suggest that the enhanced virus removal in MBR is also due to contributions from adsorption and biological degradation, which account for 1.4 - 2.0 and 0.2 - 1.3 to the total LRV, respectively. There were differences in the behaviour of indigenous and model organisms as well as coliphages that require further investigation.
Pathogen LRVs were quantified from a unique, 10-year-old MBR installation, in line with recent guidance from the WRF Project 4997. Results indicate that the Kubota membrane system studied should achieve LRVs of >3.0 for Cryptosporidium, 4.0 for Giardia and over 2.5 for enteroviruses over its lifetime. To further understand the contributions of the bioreactor to pathogen removal in MBR, systematic pilot scale studies were also conducted. Results suggest that the enhanced virus removal in MBR is also due to contributions from adsorption and biological degradation, which account for 1.4 - 2.0 and 0.2 - 1.3 to the total LRV, respectively.
SpeakerFontaine, Nicola
Presentation time
12:05:00
12:25:00
Session time
11:00:00
12:30:00
SessionLatest on Gaining Log Removal Credits for MBRs
Session number422
TopicDisinfection and Public Health, Microconstituents, Policy and Regulation, Research and Innovation, Water Reuse and Reclamation
TopicDisinfection and Public Health, Microconstituents, Policy and Regulation, Research and Innovation, Water Reuse and Reclamation
Author(s)
Nicola Fontaine
Author(s)N. Fontaine1; L. Morris2; A. Branch9; A. Salveson8; C. McBride3; H. Kuge4; K. Modaressi5; A.C. Gilmore7;Y. Terao6;
Author affiliation(s)Carollo Engineers Inc, Sacramento, CA1Kubota Membrane USA Corp., Canton, OH2, 6Nevada County Sanitation, Nevada City, CA3Kubota Membrane USA Corp., Bothell, WA4, 5Carollo Engineers Inc, Phoenix, AZ7
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2021
DOI10.2175/193864718825158121
Volume / Issue
Content sourceWEFTEC
Copyright2021
Word count13

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