| Title: |
Efficacy of locally-available cleaning methods and household chlorination at inhibiting biofilm development in jerricans used to store household drinking water |
| Authors: |
String G. M.; Domini M.; Badr H.; Brodsky H.; Kamal Y.; Tatro T.; Johnston M.; Ogudipe A.; Vu T. N.; Wolfe M. K.; Lantagne D. S. |
| Contributors: |
String G. M.; Domini M.; Badr H.; Brodsky H.; Kamal Y.; Tatro T.; Johnston M.; Ogudipe A.; Vu T. N.; Wolfe M. K.; Lantagne D. S. |
| Publication Year: |
2021 |
| Collection: |
Università degli Studi di Brescia: OPENBS - Open Archive UniBS |
| Description: |
Jerricans are commonly used to store household drinking water. However, biofilms can grow on jerrican surfaces and contaminate water. To investigate mechanisms to inhibit biofilm growth, 72 5 L jerricans containing E. coli-spiked water were incubated for 10 weeks in the laboratory. Jerricans were stratified by: water treatment with chlorine; turbidity; and, regular cleaning with NaOCl, rocks, sand, NaOCl/rocks, and NaOCl/sand. At study end, surface E. coli was enumerated and biofilms imaged using epifluorescence microscopy; free chlorine residual was tested regularly. We found biofilms grew rapidly in jerricans (presence confirmed in 3 weeks), and chlorine demand within jerricans increased over time as FCR decreased from 1.16 to 0.59 mg L-1 over the course of the study in 5 NTU treated waters. Biofilm growth was significantly inhibited by water treatment with chlorine (p = 0.03), and was inhibited by cleaning with NaOCl or NaOCl/rocks. Cleaning with rocks increased surface roughness, which promotes biofilm growth. These results highlight the need for research on locally-appropriate cleaning methods and/or alternatives (e.g. replacement, biofilm-resistant surfaces) to ensure jerricans provide safe storage of drinking water. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:000617006400010; volume:7; issue:2; firstpage:367; lastpage:383; numberofpages:17; journal:ENVIRONMENTAL SCIENCE. WATER RESEARCH & TECHNOLOGY; http://hdl.handle.net/11379/555187 |
| DOI: |
10.1039/d0ew00748j |
| Availability: |
http://hdl.handle.net/11379/555187; https://doi.org/10.1039/d0ew00748j |
| Accession Number: |
edsbas.984C9B4C |
| Database: |
BASE |