Microbiological Evaluation of 5 L- and 20 L-Transparent Polypropylene Buckets for Solar Water Disinfection (SODIS)
| Autor: | Tracy Morse, Kevin G. McGuigan, Pilar Fernández-Ibáñez, Elvira Ares-Mazás, Kingsley Lungu, Hipólito Gómez-Couso, María Jesús Abeledo-Lameiro, M. Inmaculada Polo-López, Aurora Reboredo-Fernández, Azahara Martínez-García, Lyndon Buck |
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| Přispěvatelé: | Universidade de Santiago de Compostela. Departamento de Microbioloxía e Parasitoloxía, Universidade de Santiago de Compostela. Instituto de Investigación e Análises Alimentarias |
| Rok vydání: | 2019 |
| Předmět: |
Inactivation kinetics
Pharmaceutical Science Cryptosporidium 02 engineering and technology 010501 environmental sciences Polypropylenes E. coli 01 natural sciences SODIS Article Analytical Chemistry lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry Drug Discovery Humans Drinking water Physical and Theoretical Chemistry 0105 earth and related environmental sciences Sunlight Polypropylene Small volume Organic Chemistry Middle income countries drinking water Temperature Thermal Conductivity household water treatment and storage 021001 nanoscience & nanotechnology Pulp and paper industry 6. Clean water Disinfection Solar water disinfection Volume (thermodynamics) chemistry TA Chemistry (miscellaneous) Household water treatment and storage Waterborne pathogen Molecular Medicine Environmental science MS2-phage 0210 nano-technology Water Microbiology |
| Zdroj: | Molecules Volume 24 Issue 11 Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela instname Molecules, Vol 24, Iss 11, p 2193 (2019) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules24112193 |
| Popis: | Background: Solar water disinfection (SODIS) is an appropriate technology for household treatment of drinking water in low-to-middle-income communities, as it is effective, low cost and easy to use. Nevertheless, uptake is low due partially to the burden of using small volume polyethylene terephthalate bottles (1.5&ndash 2 L). A major challenge is to develop a low-cost transparent container for disinfecting larger volumes of water. (2) Methods: This study examines the capability of transparent polypropylene (PP) buckets of 5 L- and 20 L- volume as SODIS containers using three waterborne pathogen indicators: Escherichia coli, MS2-phage and Cryptosporidium parvum. (3) Results: Similar inactivation kinetics were observed under natural sunlight for the inactivation of all three organisms in well water using 5 L- and 20 L-buckets compared to 1.5 L-polyethylene-terephthalate (PET) bottles. The PP materials were exposed to natural and accelerated solar ageing (ISO-16474). UV transmission of the 20 L-buckets remained stable and with physical integrity even after the longest ageing periods (9 months or 900 h of natural or artificial solar UV exposure, respectively). The 5 L-buckets were physically degraded and lost significant UV-transmission, due to the thinner wall compared to the 20 L-bucket. (4) Conclusion: This work demonstrates that the 20 L SODIS bucket technology produces excellent bacterial, viral and protozoan inactivation and is obtained using a simple transparent polypropylene bucket fabricated locally at very low cost ($2.90 USD per unit). The increased bucket volume of 20 L allows for a ten-fold increase in treatment batch volume and can thus more easily provide for the drinking water requirements of most households. The use of buckets in households across low to middle income countries is an already accepted practice. |
| Databáze: | OpenAIRE |
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