Impact of flocculated particles on low pressure UV inactivation of E. coli in drinking water
Bibliographic record
Abstract
Research Article| May 01 2007 Impact of flocculated particles on low pressure UV inactivation of E. coli in drinking water Guo Liu; Guo Liu 1Jacques Whitford Ltd, 3430 South Service Road, Burlington, Ontario L7N 3T9, Canada Search for other works by this author on: This Site PubMed Google Scholar Robin M. Slawson; Robin M. Slawson 2Department of Biology, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5, Canada Search for other works by this author on: This Site PubMed Google Scholar Peter M. Huck Peter M. Huck 3NSERC Chairholder in Water Treatment,University Research Chair, NSERC Industrial Research Chair in Water Treatment, Dept. of Civil and Environmental Engineering, University of Waterloo, 200 University Ave., West Waterloo, Ontario, N2L 3G1, Canada Tel.: 519-888-4567, ext. 32707 Fax: 519-746-7499; E-mail: pm2huck@uwaterloo.ca Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2007) 56 (3): 153–162. https://doi.org/10.2166/aqua.2007.104 Article history Received: September 21 2006 Accepted: December 21 2006 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Guo Liu, Robin M. Slawson, Peter M. Huck; Impact of flocculated particles on low pressure UV inactivation of E. coli in drinking water. Journal of Water Supply: Research and Technology-Aqua 1 May 2007; 56 (3): 153–162. doi: https://doi.org/10.2166/aqua.2007.104 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex This study investigated the impact of coagulated/flocculated particulate matter on low-pressure (LP) UV inactivation of spiked Escherichia coli under drinking water conditions using a standard bench scale collimated beam apparatus. The effect of floc particles in both coagulated river water and coagulated process (treatment plant) water was assessed. Laboratory grade water and uncoagulated river water were used as controls. The dose-response curves of spiked E. coli were determined at UV doses of 5, 10, 15, 25, and 40 mJ/cm2. The results indicated that surface water particles (turbidity from 12 to 32 NTU essentially have no influence on UV inactivation of spiked E. coli if they are appropriately accounted for in the UV transmittance determination. However, the presence of floc particles formed by coagulation and flocculation led to significantly lower inactivation of E. coli by LP UV. A limited investigation of medium pressure UV inactivation undertaken as part of the study indicated that shielding effects for medium pressure UV warrant further investigation. The support for the inactivation results provided by the particle size analysis carried out suggests that criteria related to particle size may be very useful in addition to turbidity for UV regulation and operation. The results emphasize the need for UV disinfection/inactivation to be placed following filtration, because a sedimentation upset (i.e. where some floc particles may reach a downstream UV unit) could potentially compromise disinfection/inactivation. bench-scale collimated beam, coagulation/flocculation, E. coli ATCC 11229, low-pressure, medium-pressure, UV inactivation This content is only available as a PDF. © IWA Publishing 2007 You do not currently have access to this content.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".