دورية أكاديمية
Household slow sand filters in continuous and intermittent flows and their efficiency in microorganism's removal from river water.
| العنوان: | Household slow sand filters in continuous and intermittent flows and their efficiency in microorganism's removal from river water. |
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| المؤلفون: | Nasser Fava NM; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, São Paulo, Brazil., Terin UC; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, São Paulo, Brazil., Freitas BLS; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, São Paulo, Brazil., Sabogal-Paz LP; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, São Paulo, Brazil., Fernandez-Ibañez P; Nanotechnology and Integrated Bioengineering Centre, School of Engineering, Ulster University, Northern Ireland, UK., Anthony Byrne J; Nanotechnology and Integrated Bioengineering Centre, School of Engineering, Ulster University, Northern Ireland, UK. |
| المصدر: | Environmental technology [Environ Technol] 2022 Apr; Vol. 43 (10), pp. 1583-1592. Date of Electronic Publication: 2020 Nov 11. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Taylor & Francis Country of Publication: England NLM ID: 9884939 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1479-487X (Electronic) Linking ISSN: 09593330 NLM ISO Abbreviation: Environ Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2008- : Oxford : Taylor & Francis Original Publication: London : Publications Division, Selper Ltd., 1990- |
| مواضيع طبية MeSH: | Rivers* , Water Purification*/methods, Escherichia coli ; Family Characteristics ; Filtration/methods ; Fresh Water ; Silicon Dioxide |
| مستخلص: | This study aimed to evaluate the efficiency of four household slow sand filter (HSSF) models for the removal of microorganisms from river water throughout the development of their biological layers ( schmutzdecke ). Two models were designed to be operated continuously (HSSF-CC and HSSF-CT) and two intermittently (HSSF-ID and HSSF-IF). Filters were fed daily with 48 L pre-treated river water (24 h sedimentation followed by filtration through a non-woven synthetic blanket). Water samples were quantified by coliform group bacteria and analysed by bright field microscopy to visualize the microorganisms. Total coliform reduction was between 1.42 ± 0.59 log and 2.96 ± 0.58 log, with continuous models showing a better performance ( p -values < 0.004). Escherichia coli reduction varied from 1.49 ± 0.58 log to 2.09 ± 0.66 log and HSSF-IF, HSSF-CC and HSSF-CT presented a similar performance ( p -values > 0.06), slightly better than the one presented by HSSF-ID ( p -value=0.04). Microorganisms, such as algae, protozoa and helminths were detected by microscopy in raw water and pre-treated water. Algae were the most significant group in these samples, although they were not visualized by bright field microscopy in the filtered water. Results showed the potential of HSSF in microbiological risk reduction from river water, which increases the range of point-of-use water treatments in rural communities. However, additional studies of the HSSF biological layer must be performed. |
| فهرسة مساهمة: | Keywords: biosand filter; decentralized treatment; drinking water; microscopy; schmutzdecke |
| المشرفين على المادة: | 7631-86-9 (Silicon Dioxide) |
| تواريخ الأحداث: | Date Created: 20201023 Date Completed: 20220411 Latest Revision: 20220411 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1080/09593330.2020.1841834 |
| PMID: | 33092473 |
| قاعدة البيانات: | MEDLINE |
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Full Text Finder | تدمد: | 1479-487X |
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| DOI: | 10.1080/09593330.2020.1841834 |