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Microbiological evaluation of 5 L- and 20 L-transparent polypropylene buckets for solar water disinfection (SODIS)

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posted on 22.12.2021, 09:36 authored by María Inmaculada Polo-López, Azahara Martínez-García, Maria Jesus Abeledo-Lameiro, Hipolito H Gómez-Couso, Elvira E Ares-Mazás, Aurora Reboredo-Fernández, Tracy D Morse, Lyndon Buck, Kingsley Lungu, Kevin McGuiganKevin McGuigan, Pilar Fernández-Ibáñez
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 (1.5-2 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.

Funding

WATERSPOUTT Water - Sustainable Point-Of-Use Treatment Technologies | Funder: EU Horizon 2020 | Grant ID: H2020-2016-RIA-688928-2

EI CF PANI EI Coordination funds for H2020 submission | Funder: Enterprise Ireland H2020 Support | Grant ID: N/A

WATERSPOUTT Coordination Funds | Funder: Enterprise Ireland H2020 Support | Grant ID: CS20141060

Global Health Institute of Poverty Related Diseases (IPRD) | Funder: Translational Research Hub - TRH | Grant ID: RCSI-DCU-NUIM JIGH 1

Princess Haya SODIS Primary School Project | Funder: Private Donor | Grant ID: N/A

Conference | Funder: RCSI | Grant ID: N/A

A Joint RCSI/DCU/NUIM Global Health Institute/Network | Funder: 3U RCSI, DCU, NUIM | Grant ID: A Joint RCSI/DCU/NUIM Global Health Institute/Network

Combined Solar Disinfection & Harvested Rainwater Treatment in Sub-Saharan African Primary Schools | Funder: Princess Haya Foundation | Grant ID: N/A

Water - Sustainable Point-Of-Use Treatment Technologies (WATERSPOUTT) | Funder: European Commission Directorate-General for Research and Innovation | Grant ID: EU-H2020-2015-SC5-Water-688928

Photo-irradiation and Adsorption based Novel Innovations for Water-treatment (PANIWATER) | Funder: EU Horizon2020 | Grant ID: EU-H2020-SC5-12-2018-820718

History

Comments

The original article is available at https://www.mdpi.com/

Published Citation

Polo-López MI. et al. Microbiological evaluation of 5 L- and 20 L-transparent polypropylene buckets for solar water disinfection (SODIS). Molecules. 2019;24(11):2193.

Publication Date

11 June 2019

PubMed ID

31212699

Department/Unit

  • Physiology and Medical Physics

Research Area

  • Population Health and Health Services

Publisher

MDPI

Version

  • Published Version (Version of Record)